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Articles 1 - 30 of 99
Full-Text Articles in Plant Biology
Plant-Water Relationships Of Crested, Pubescent, Slender, And Western Wheatgrass, A B. Frank
Plant-Water Relationships Of Crested, Pubescent, Slender, And Western Wheatgrass, A B. Frank
IGC Proceedings (1977-2023)
Objectives were to characterize development of water stress in the field and in controlled environments; to determine stress effects on transpit"ation (E), stomata} conductance (C), leaf water potential (LWP), leaf osmotic potential (LOP), and photosynthesis (P); and to relate measured changes to drought tolerance in crested wheatgrass (Agropyron desertorom [Fisch.] Schult.), slender wheatgrass (A. trachycaulum [Link] Malte.), pubescent wheatgrass (A. intermedium var. trichophorum [Link] Haloc), and western wheatg:rass (A. smithii Rydb. ). Both L WP and LOP decreased for all species as soil water potential decreased, but not in a 1: 1 ratio indicative of maximum osmotic adjustment. The LWP …
Hail As An Ecological Factor In The Increase Of Pricklypear Cactus, W A. Laycock
Hail As An Ecological Factor In The Increase Of Pricklypear Cactus, W A. Laycock
IGC Proceedings (1977-2023)
Detached joints or pads of plains pricklypear cactus (Opuntia pov,acantha) can root and form new plants. However, few data exist to quantify this phenomenon or to describe conditions under which rooting takes place. A severe hailstorm at the Central Plains Experimental Range in northeastern Colorado on 31 July 1978 broke segments from plants of plains pricklypear. This occurrence provided an opportunity to determine the amount of joint dispersal and rooting from a natural destructive event. Cactus joints detached and scattered by the force of the hail were counted on permanent belt transects established in two pastures having different pricklypear populations. …
Passive Microwave Remote Sensing Of Flash Drought Impacts On Vegetation, Quinton R. Deppert
Passive Microwave Remote Sensing Of Flash Drought Impacts On Vegetation, Quinton R. Deppert
School of Natural Resources: Dissertations, Theses, and Student Research
In 2002, Dr. Mark Svoboda characterized a new form of drought known as flash drought. Flash drought was defined as a rapid decline in vegetation health caused by severe heat and drought. In recent years, attempts to quantify the impacts of flash drought via precipitation, soil moisture, evapotranspiration, and temperature indicators have proliferated. What has rarely been quantified is what the rapid decline in vegetation health amid flash drought looks like through remote sensing. This is because vegetation health indices like the Normalized Difference Vegetation Index (NDVI) are derived from the visible and infrared regions of the electromagnetic spectrum and …
Co2 Exchange Of The Abovegrass And Belowground Components Of Kleingrass (Panicum Coloratum L.) During Drought In The Northern Chihuahuan Desert, William B. Sisson
Co2 Exchange Of The Abovegrass And Belowground Components Of Kleingrass (Panicum Coloratum L.) During Drought In The Northern Chihuahuan Desert, William B. Sisson
IGC Proceedings (1977-2023)
The effect a 52 day drought had on the die! whole-plant carbon balance of kleingrass (Panicum coloratum L.) growing in the northern Chihuahuan desert was determined. Whole-plant CO2 inputs (photosynthesis) and outputs (belowground and aboveground respiration) were measured on day 52 of the drought (June 23, 1981) and 2 days following 1.12 cm of precipitation that occurred on June 24, 1981. Although net photosynthesis rates were severely depressed on June 23, a positive whole-plant carbon balance was determined prior to and following the rain. On a whole-plant basis,.002 g C/g DW/day was gained on June 23 and .015 g …
Special Enhancements Using Noaa Satellite Data To Evaluate Grasslands Of Western Canada, H Mccartney, J Whiting, J Polson
Special Enhancements Using Noaa Satellite Data To Evaluate Grasslands Of Western Canada, H Mccartney, J Whiting, J Polson
IGC Proceedings (1977-2023)
The grazing and hay lands of Saskatchewan, a Province in western Canada, extend from the wide open short grass prairie of the south to the northern roughland bush pastures of the Aspen Parkland (Populus tremuloides). These areas total 7,853,000 ha. This study is part of a continuing effort directed towards the development of operational remote sensing analysis techniques for the estimation of grazing conditions in both native and seeded pastures in Saskatchewan. Multi-spectral remotely sensed data from satellites has proven useful in assessing crop vigour. In most cases, where drought assessment or monitoring was required, large land areas were involved …
Summerpack*, A Computer Package For Sheep And Pasture Management Over The Summer/Autumn Period In A Mediterranean Environment, J.P G. Orsini
Summerpack*, A Computer Package For Sheep And Pasture Management Over The Summer/Autumn Period In A Mediterranean Environment, J.P G. Orsini
IGC Proceedings (1977-2023)
The south-western part of Western Australia has a Mediterranean type climate characterized by a dry summer/autumn period that can extend over more than six months. The quantity and the quality of the dry pastures progressivily deteriorate from senescence until the break of season when germination occurs. Although dry adult sheep usually maintain weight in the first two months, weight losses can be high in autumn unless supplements are fed. It is important for farmers at the beginning of summer to obtain an estimate of the amount of supplements they need to purchase or keep in storage and what would be …
Quantifying Dna Methylation In Response To Drought Stress In Silver Firs (Abies Alba), Julia K. Brandfonbrener
Quantifying Dna Methylation In Response To Drought Stress In Silver Firs (Abies Alba), Julia K. Brandfonbrener
Biology Honors Projects
As future droughts are expected to increase in duration and severity due to climate change, forest managers may need to evaluate which coniferous species are the most resilient in drought events. Drought stress induces changes in physiology, including decreases in water potential, stomatal closure, pigment degradation, and leaf senescence (Jongdee et al., 2002, Munné-Bosch & Alegre, 2004, Heitholt et al., 1991). These physiological changes are associated with epigenetic regulation of gene expression in response to abiotic stressors (Alongi et al. 2025) and have been highly studied in crop plants and Arabidopsis. This project examines the photosynthetic and epigenetic response …
Drought Pearl Millet- An Unpalatable Enigma, D J. Minson, J B. Hacker, M Shimojo, P Stuart, J Slatter
Drought Pearl Millet- An Unpalatable Enigma, D J. Minson, J B. Hacker, M Shimojo, P Stuart, J Slatter
IGC Proceedings (1977-2023)
After planting in late 1989 there were many reports that Nutrifeed was unpalatable to cattle, sheep and horses. Seventyfive properties were visited where unpalatability was common, a questionnaire was distributed and samples of forage and soil were analysed. Forty-six properties reported unpalatability but on the other 29, pearl millet was palatable. Unpalatability developed only when forage grown on soil high in available nitrogen was subjected to a shortage of water. Unpalatable forage was dark green, contained more than 3S g N/kg DM and was often low in phosphorus, After rain or irrigation the new growth was usually palatable but stock …
Photosynthesis And Water Relations Of A C4 And A C3 Grass Under Doubled Carbon Dioxide, D Nie, M B. Kirkham, E T. Kanemasu
Photosynthesis And Water Relations Of A C4 And A C3 Grass Under Doubled Carbon Dioxide, D Nie, M B. Kirkham, E T. Kanemasu
IGC Proceedings (1977-2023)
The objective of this project was to determine during an entire season the photosynthetic rate and water potential of a C3 grass (Kentucky bluegrass, Poa pratensis L.) and a C4 grass (big bluestem, Andropogon gerardii Vitman) grown with 2 levels of CO2 (ambient or twice ambient) and 2 water levels (field capacity or no water added). Elevated CO2 increased the photosynthetic rate of Kentucky bluegrass by an average of 76%. During mid-season (11 June-16 July), photosynthetic rate of high-water big bluestem with ambient CO2 was about the same as that of low-water big bluestem with doubled CO2• Under both water …
Adaptation Of Sainfoin Cultivars And Lucerne To Water Stress, S R. Mir Hosseini, P D. Kemp, D J. Barker, J Hodgson
Adaptation Of Sainfoin Cultivars And Lucerne To Water Stress, S R. Mir Hosseini, P D. Kemp, D J. Barker, J Hodgson
IGC Proceedings (1977-2023)
Sainfoin ( Onobrychis viciifolia Scop.) is of particular interest as a pasture crop because it is a productive legume in dry areas but does not induce bloat in ruminant animals. In this study 3·sainfoin cultivars (Fakir, Melrose and 035) and l lucerne (Medicago saliva L.) cultivar Grasslands Oranga were compared during a drying phase when water was withheld once; flowering began. A randomised complete block design with 4 replicates' was used. Transpiration rate (Tr) declined as volumetric soil water content (VSWC) was reduced. Stomata! resistance (Rs) increased and relative ivater content (RWC) decreased when VSWC decreased. Critical VSWC for …
Physiological Response Of White Clover Genotypes To Water Deficit, D J. Barker, J R. Caradus, M T. Mcmanus
Physiological Response Of White Clover Genotypes To Water Deficit, D J. Barker, J R. Caradus, M T. Mcmanus
IGC Proceedings (1977-2023)
Three plants from each of 2 white clover (Trifolium repens L.) cultivars, Grasslands Kopu and a breeding line selected from germplasm of Syrian origin, were grown in large pots of soil and physiological characteristics measured during a continuous drying phase of 18-37 days. By the end of the experiment, leaf water potential was -2.5 MPa, gravimetric soil water content was 13% (considerably lower than -1.5 MPa), and leaf relative water content was 60%. A 91- fold increase in leaf praline concentration indicated that water stress had altered plant metabolism. Differences in the rate of soil drying occurred between eultivars, but …
Forecasting Annual Drought Conditions For Arid And Semi-Arid Rangelands, C L. Hanson, J R. Wight
Forecasting Annual Drought Conditions For Arid And Semi-Arid Rangelands, C L. Hanson, J R. Wight
IGC Proceedings (1977-2023)
Long-term weather forecasts (>14 days) have improved, but still lack accurate enough information to be valuable; thus, drought forecasts must be based on historical records and calculated probabilities of occurrence. The use of regression techniques to investigate linear dependence between current and preceding years' precipitation or forage yield is illustrated. A 3-state Markov process is used to determine relationships between below-average, average and aboveaverage consecutive annual herbage yields, and winter and spring precipitation amounts. Methods for using natl/ml resource simulation models to forecast ecosystem components such as herbage production, runoff, and erosion with their associated probabilities of occurrence are …
Carbohydrate Reserves Of Perennial Grasses: Effect Of Drought And Defoliation Intensity, S P. Boschma, M J. Hill, J M. Scott, J J. Lutton
Carbohydrate Reserves Of Perennial Grasses: Effect Of Drought And Defoliation Intensity, S P. Boschma, M J. Hill, J M. Scott, J J. Lutton
IGC Proceedings (1977-2023)
The carbohydrate reserves of six perennial grasses were measured during exposure to drought and defoliation over spring-summer and summer-autumn seasons. Of the six species assessed, tall fescue (Festuca arundinacea) and perennial ryegrass (Lolium perenne) had the highest level of reserves while wallaby grass (Danthonia richardsonii) had the lowest levels. The results indicate that during the spring-summer period drought intensity had a greater effect on plant reserves than defoliation intensity. However, defoliation had a greater effect on reserves during the summer-autumn period. It is suggested that tiller reserves may be most affected when drought is …
The Interaction Between Root Distribution And Pasture Growth During Water Deficit, D J. Barker, N Dymock
The Interaction Between Root Distribution And Pasture Growth During Water Deficit, D J. Barker, N Dymock
IGC Proceedings (1977-2023)
Quantification of water-limited pasture growth is of interest in agriculture since it allows prediction of impaired animal production during drought, and is the basis for scheduling irrigation. Experimental work on two dairy pastures 25 km south-west of Palmerston North, New Zealand found 50% of root mass was in the top 2.3 cm of soil. Soil moisture was, similarly, not uniformly distributed down the soil profile and dried most rapidly in the top 20†cm of soil. Leaf appearance rate was more strongly correlated with water status nearer the soil surface (r = 0.52 & 0.63 for 0-5 & 10-15 cm depth, …
Response To Drought Of White Clover Lines Selected For Different Stolon Morphologies, H D. Karsten, J R. Caradus, D R. Woodfield
Response To Drought Of White Clover Lines Selected For Different Stolon Morphologies, H D. Karsten, J R. Caradus, D R. Woodfield
IGC Proceedings (1977-2023)
White clover (Trifolium repens L.) lines were selected from within large and small-leaved cultivars of Grasslands Kopu and Grasslands Tahora, respectively, for long or short internodes, and for high or low branching frequency from plants grown in sun and shade (50% full sunlight). Lines were compared for drought tolerance in a perennial ryegrass (Lolium perenne L.) sward in boxes. Prior to imposing drought branching frequency selections did not differ in branching frequency, although the low branching frequency selection had a higher percentage of rooted nodes. After an imposed drought treatment sun-selected lines grew better than shade-selected lines relative …
The Emerging Role Of Non-Coding Rnas (Ncrnas) In Plant Growth, Development, And Stress Response Signaling, Amit Yadav, Jyotirmaya Mathan, Arvind Kumar Dubey, Anuradha Singh
The Emerging Role Of Non-Coding Rnas (Ncrnas) In Plant Growth, Development, And Stress Response Signaling, Amit Yadav, Jyotirmaya Mathan, Arvind Kumar Dubey, Anuradha Singh
Center for Plant Science Innovation: Faculty Publications
Plant species utilize a variety of regulatory mechanisms to ensure sustainable productivity. Within this intricate framework, numerous non-coding RNAs (ncRNAs) play a crucial regulatory role in plant biology, surpassing the essential functions of RNA molecules as messengers, ribosomal, and transfer RNAs. ncRNAs represent an emerging class of regulators, operating directly in the form of small interfering RNAs (siRNAs), microRNAs (miRNAs), long noncoding RNAs (lncRNAs), and circular RNAs (circRNAs). These ncRNAs exert control at various levels, including transcription, posttranscription, translation, and epigenetic. Furthermore, they interact with each other, contributing to a variety of biological processes and mechanisms associated with stress resilience. …
Variation In Grazing Sward Chicory Content After Periods Of Low Rainfall, Kevin Dolan, C. Hearn, D. Hennessy, R. Henriques, M. B. Lynch, Michael O’Donovan
Variation In Grazing Sward Chicory Content After Periods Of Low Rainfall, Kevin Dolan, C. Hearn, D. Hennessy, R. Henriques, M. B. Lynch, Michael O’Donovan
IGC Proceedings (1977-2023)
Multispecies (MS) swards can reduce chemical nitrogen (N) fertiliser requirement due to the legume components of the sward mixtures, and have the potential to increase drought tolerance, particularly where chicory (CH, Chicorium intybus L.) is included in the sward mixture. A grazed plot experiment was established to investigate the persistency of forage herb species in MS swards under typical Irish grazing conditions. The swards contained three plant functional groups: grass, legume and herb; four sward types were established which included sward mixtures of the following species: perennial ryegrass (PRG, Lolium perenne L.) white clover (WC, Trifolium repens L.), red clover …
Irrigation Effects On Forage Dry Matter Yield And Nutritive Value Of Alfalfa, Rudra Baral, Doohong Min
Irrigation Effects On Forage Dry Matter Yield And Nutritive Value Of Alfalfa, Rudra Baral, Doohong Min
IGC Proceedings (1977-2023)
Alfalfa (Medicago sativa L.) is among the top four field crops in United States (U.S.) in terms of acreage harvested and economic value. Several studies have documented that alfalfa requires high amount of water compared to other major field crops. However, more than 65% alfalfa in the U.S. is grown under rainfed condition where severe to moderate drought condition has been pronounced during alfalfa growing season. The magnitude of yield loss due to water-limited conditions is still unknown. In this context, the objective of our study is to evaluate the forage dry matter yield and forage nutritive value of …
Beyond The Boom: Integrated Approaches To Managing Weeds And Brush, M. L. Treadwell, D. Burson
Beyond The Boom: Integrated Approaches To Managing Weeds And Brush, M. L. Treadwell, D. Burson
IGC Proceedings (1977-2023)
William Bray stated in his 1904 report, The Timber of the Edwards Plateau of Texas, "This struggle of the timberlands to capture the grasslands is an old warfare....it spreads like infection.” This trend is true today and especially pronounced in the Great Plains, where only 1/4 of the Great Plains’ original grasslands remains intact. Species like honey mesquite, honey locust, black locust, sumac, dogwood, post oak, winged elm, Siberian elm, salt cedar, huisache, Eastern redcedar, Ashe and redberry juniper, pricklypear, sericea lespedeza, and many other species represent alarming rates of spread and rapid establishment throughout Great Plains grasslands. Although, these …
Effect Of Timing And Intensity Of Drought On Perennial Ryegrass Seed Yield, R. J. Martin, R. N. Gillespie, S. Maley
Effect Of Timing And Intensity Of Drought On Perennial Ryegrass Seed Yield, R. J. Martin, R. N. Gillespie, S. Maley
IGC Proceedings (1977-2023)
Perennial ryegrass seed worth about $50 million is produced annually in Canterbury, New Zealand (Rowarth 1998). Ryegrass seed production in New Zealand is often affected by drought, reducing both seed number and seed size (Rolston et al., 1994). Irrigation management recommendations are not currently available for farmers growing ryegrass seed crops. To quantify the effect of water stress on perennial ryegrass seed yield, we carried out an experiment in a rainshelter where rainfall was excluded from experimental plots otherwise exposed to normal weather (Martin et al., 1990).
Forage Monitoring Technology To Improve Risk Management Decision Making By Herders In The Gobi Region Of Mongolia, Jay Angerer, J. W. Stuth, D. Tsogoo, G. Tolleson, Dennis Sheehy, U. Gombosuren, Sean Granville-Ross
Forage Monitoring Technology To Improve Risk Management Decision Making By Herders In The Gobi Region Of Mongolia, Jay Angerer, J. W. Stuth, D. Tsogoo, G. Tolleson, Dennis Sheehy, U. Gombosuren, Sean Granville-Ross
IGC Proceedings (1977-2023)
In the period from 1999 to 2002, Mongolia experienced a series of droughts and severe winters that lowered livestock numbers by approximately 30% countrywide. In the Gobi region, livestock mortality reached 50% with many households losing entire herds (Siurua & Swift 2002). In March 2004, a program was initiated by the United States Agency for International Development (USAID) through the Global Livestock Collaborative Research and Support Program (GLCRSP). The goal of this program is to develop forage monitoring technologies that provide early warning of drought and winter disaster to improve livestock herder decision making in the Gobi region. The program …
Dynamics Of Long-Term Carbon Sequestration On Rangelands In The Western Usa, G. E. Schuman, L. J. Ingram, P. D. Stahl, G. F. Vance
Dynamics Of Long-Term Carbon Sequestration On Rangelands In The Western Usa, G. E. Schuman, L. J. Ingram, P. D. Stahl, G. F. Vance
IGC Proceedings (1977-2023)
Rangelands in the USA occupy 161 million hectares of land. Worldwide, rangelands occupy about half of the land area and account for more than 1/3 of the world's terrestrial carbon (C) reserves. Because of their large land area, rangelands have the potential to sequester a significant amount of additional atmospheric C. Schuman et al. (2001) estimate that rangelands and marginal croplands restored to grasslands in the USA can sequester 64 million metric tonnes C/ha/yr if properly managed. The objective of this research was to evaluate the long-term effects of grazing on soil C storage in a northern mixed-grass prairie (NMP).
Long-Term (9-Year) Response Of Two Semiarid Grasslands To Prescribed Fire In The Southwestern Usa, R. L. Pendleton, B. K. Pendleton, C. S. White
Long-Term (9-Year) Response Of Two Semiarid Grasslands To Prescribed Fire In The Southwestern Usa, R. L. Pendleton, B. K. Pendleton, C. S. White
IGC Proceedings (1977-2023)
Historically, arid grasslands of SW USA experienced fire return intervals of 5-10 years. During the last 100 years, however, fire has been a rare event. Recent expansion of woody plants in arid grasslands has prompted managers to re-introduce fire as a tool to reduce abundance of woody plants and maintain perennial grass cover. The use of fire in desert grasslands poses unique challenges, however, due to extreme variability in rainfall patterns. Our research examines vegetation response to repeat fire in 2 desert grassland ecotones near Albuquerque, New Mexico (35.05o N 106.60o W).
Endophyte Effects On Antioxidants And Membrane Leakage In Tall Fescue During Drought, C. P. West, R. D. Carson, C. A. Guerber, B. De Los Reyes
Endophyte Effects On Antioxidants And Membrane Leakage In Tall Fescue During Drought, C. P. West, R. D. Carson, C. A. Guerber, B. De Los Reyes
IGC Proceedings (1977-2023)
Tall fescue [Festuca arundinacea (Schreb.)=Lolium arundinaceum (Schreb.) S.J. Darbyshire] infected (E+) by its fungal endophyte [(Neotyphodium coenphialum Morgan-Jones & Gams.) Glenn, Bacon & Hanlin] often shows greater persistence during summer drought than endophyte-free (E-) plants (Malinowski et al., 2005). Survival of the apical meristem and growing zone of vegetative tillers likely involves biochemical adaptations whose benefits to the host are enhanced by endophyte presence. Antioxidant enzymes may scavenge free radicals during heat and drought, and thereby reduce membrane damage. Their roles in endophyte-mediated drought tolerance in tall fescue have not been tested. Our objective was to …
Pearl Millet Response To Drought: A Review, Nikee Shrestha, Hao Hu, Kumar Shrestha, Andrew N. Doust
Pearl Millet Response To Drought: A Review, Nikee Shrestha, Hao Hu, Kumar Shrestha, Andrew N. Doust
Department of Agronomy and Horticulture: Faculty Publications
The C4 grass pearl millet is one of the most drought tolerant cereals and is primarily grown in marginal areas where annual rainfall is low and intermittent. It was domesticated in sub-Saharan Africa, and several studies have found that it uses a combination of morphological and physiological traits to successfully resist drought. This review explores the short term and long-term responses of pearl millet that enables it to either tolerate, avoid, escape, or recover from drought stress. The response to short term drought reveals fine tuning of osmotic adjustment, stomatal conductance, and ROS scavenging ability, along with ABA and ethylene …
De Novo Transcriptome Assembly From The Nodal Root Growth Zone Of Hydrated And Water-Deficit Stressed Maize Inbred Line Fr697, Sidharth Sen, Shannon K. King, Tyler Mccubbin, Laura A. Greeley, Rachel A. Mertz, Cheyenne Becker, Nicole Niehues, Shuai Zeng, Jonathan T. Stemmle, Scott C. Peck, Melvin J. Oliver, Felix B. Fritschi, David M. Braun, Robert E. Sharp, Trupti Joshi
De Novo Transcriptome Assembly From The Nodal Root Growth Zone Of Hydrated And Water-Deficit Stressed Maize Inbred Line Fr697, Sidharth Sen, Shannon K. King, Tyler Mccubbin, Laura A. Greeley, Rachel A. Mertz, Cheyenne Becker, Nicole Niehues, Shuai Zeng, Jonathan T. Stemmle, Scott C. Peck, Melvin J. Oliver, Felix B. Fritschi, David M. Braun, Robert E. Sharp, Trupti Joshi
Biomedical Sciences
Certain cultivars of maize show increased tolerance to water deficit conditions by maintenance of root growth. To better understand the molecular mechanisms related to this adaptation, nodal root growth zone samples were collected from the reference inbred line B73 and inbred line FR697, which exhibits a relatively greater ability to maintain root elongation under water deficits. Plants were grown under various water stress levels in both field and controlled environment settings. FR697‑specific RNA‑Seq datasets were generated and used for a de novo transcriptome assembly to characterize any genotype‑specific genetic features. The assembly was aided by an Iso‑Seq library of transcripts …
Effect Of Water Stress On Weed Germination, Growth Characteristics, And Seed Production: A Global Meta-Analysis, Mandeep Singh, Resham Thapa, Meetpal Singh Kukal, Suat Irmak, Steven Mirsky, Amit J. Jhala
Effect Of Water Stress On Weed Germination, Growth Characteristics, And Seed Production: A Global Meta-Analysis, Mandeep Singh, Resham Thapa, Meetpal Singh Kukal, Suat Irmak, Steven Mirsky, Amit J. Jhala
Department of Agronomy and Horticulture: Faculty Publications
Weeds compete with crops for soil moisture, along with other resources, which can impact the germination, growth, and seed production of weeds; however, this impact has not been systematically recorded and synthesized across diverse studies. To address this knowledge gap, a global meta-analysis was conducted using 1,196 paired observations from 86 published articles assessing the effect of water stress on weed germination, growth characteristics, and seed production. These studies were conducted and published during 1970 through 2020 across four continents (Asia, Australia, Europe, and North America). Imposed water stress was expressed as solution osmotic potential (ψsolution), soil water potential (ψsoil), …
Differential Regulation Of Flower Transpiration During Abiotic Stress In Annual Plants, Ranjita Sinha, Sara I. Zandalinas, Yosef Fichman, Sidharth Sen, Shuai Zeng, Aurelio Gómez-Cadenas, Trupti Joshi, Felix B. Fritschi, Ron Mittler
Differential Regulation Of Flower Transpiration During Abiotic Stress In Annual Plants, Ranjita Sinha, Sara I. Zandalinas, Yosef Fichman, Sidharth Sen, Shuai Zeng, Aurelio Gómez-Cadenas, Trupti Joshi, Felix B. Fritschi, Ron Mittler
Biomedical Sciences
Heat waves occurring during droughts can have a devastating impact on yield, especially if they happen during the flowering and seed set stages of the crop cycle. Global warming and climate change are driving an alarming increase in the frequency and intensity of combined drought and heat stress episodes, critically threatening global food security. Because high temperature is detrimental to reproductive processes, essential for plant yield, we measured the inner temperature, transpiration, sepal stomatal aperture, hormone concentrations and transcriptomic response of closed soybean flowers developing on plants subjected to a combination of drought and heat stress. Here, we report that, …
Elucidating The Cellular Physiology Of Glyphosate Resistance In Palmer Amaranth (Amaranthus Palmeri) Using Integrated Omics Approaches, Pawanjit Kaur Sandhu
Elucidating The Cellular Physiology Of Glyphosate Resistance In Palmer Amaranth (Amaranthus Palmeri) Using Integrated Omics Approaches, Pawanjit Kaur Sandhu
All Theses
The evolution of resistance to herbicides in weeds poses a major threat to agricultural production systems. To date, herbicide resistance has been reported against 21 modes of action in 266 weed species across 71 countries. More than 50 weed species have developed resistance against glyphosate, the most widely used herbicide worldwide. Although several mechanisms of glyphosate resistance have been discovered, our understanding of alterations in the cellular physiology of glyphosate-resistant weed biotypes, and the induction of the resistance mechanisms remains limited. This knowledge is critical to developing sustainable weed management practices and for a comprehensive understanding of plant stress adaptations. …
Spring Forage Stash Module To Prevent Forage Crisis On Uruguayan Livestock Systems: An Evaluation Based On Model Simulations, M. Pereira Machín, F. Dieguez Cameroni
Spring Forage Stash Module To Prevent Forage Crisis On Uruguayan Livestock Systems: An Evaluation Based On Model Simulations, M. Pereira Machín, F. Dieguez Cameroni
IGC Proceedings (1977-2023)
In Uruguay, rangeland cattle production systems support national economy by beef exportation chain and economic inputs to the country. Soil hydric stress episodes results to forage crisis on grassland-based production systems, having high impact on its trajectory and leaving sequels at several farm levels mainly on rearing cattle systems in drought sensitive regions of the country. In that context, the proposal is to create a spring forage stash module, with a simple management rules as a mechanism to build stability to farms and to buffering drought impact. The concept is to differ spring forage (season with low variation coefficient on …