Plant Sciences Commons^™

Effectors, Effectors Et Encore Des Effectors: The Xiv International Congress On Molecular-Plant Microbe Interactions, Quebec, Jonathan D. Walton, Tyler J. Avis, James R. Alfano, Mark Gijzen, Pietro Spanu, Kim Hammond-Kosack, Federico Sánchez

Center for Plant Science Innovation: Faculty and Staff Publications

The IS-MPMI held its fourteenth meeting in Quebec City July 19-23, 2009. There were 956 attendees from 49 countries. Just over 50% of the participants were students or postdoctoral associates. Hani Antoun (Université Laval, Canada) served as Program Chair, capably assisted by the Local Organizing Committee and the IS-MPMI International Advisory Board. There were eight plenary sessions, 18 concurrent sessions, and over 700 posters.

Letter From The Dean, Lalit Verma

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

Measuring Water Use Efficiency In Large And Small Leaves Of Malosma Laurina, Caitlin Ishibashi, Dan Kaczrowski, Evan Mattiansen

Featured Research

Our study set out to compare Water Use Efficiency (WUE) levels of Malosma laurina plants in both small and large leaves. We collected a total of 3 data sets, with each set consisting of 5 small leaves and 5 large leaves from a single specimen of Malosma laurina located on Pepperdine’s campus. Parameters including transpiration and photosynthesis were measured to calculate WUE of small and large leaves using an LI- 6400 Gas Exchange System. We hypothesized that small leaves would have a higher WUE rate than large leaves of the M. laurina. Analysis of this data via a paired …

The Effect Of Hydraulic Lift In Quercus Agrifolia On The Health Of Venegasia Carpesioides, Kelly Donovan, Brittany Wagner

Featured Research

Hydraulic lift was studied in live and dead Quercus agrifolia (Coastal Live Oak) in order to test its impact on surrounding Venegasia carpesioides (Canyon Sunflower). Hydraulic lift causes soil moisture to rise around the base of deep-rooted plants where neighboring plants can utilize this excess water. We predicted that the hydraulic lift of the Coastal Live Oak would increase soil moisture, causing higher stomatal conductance and higher water potential in nearby plants. Pvalues of .5258 and .6392 indicated there were no significant differences in soil moisture or in stomatal conductance of the Canyon Sunflowers. A p-value of .0378 showed a …

The Effects Of Light Intensity And Color Absorption Of Diurnal Leaf Movements Of Malva Parviflora, Amy Lawrence, Ben Young, Matthew Yarborough

Featured Research

Our group measured the heliotropic response rate of the Malva parviflora under various light environments in order to see the effect that light color and intensity had on daily leaf movement. In our experiment we measured the leaf angle of plants under white, blue, red and green light, as well as plants under shade, over a specific duration of time in order to determine the rate of change. We ran a One-Way Analysis of Variance on leaf angle for light color as well as coverage at a 0.05 level using SPSS 17.0. The ANOVA test showed no significance for light …

Comparison Of Uva Absorbance In Sun And Shade Leaves, James Newton, Kevin Rivera, James Kim

Featured Research

In observing chaparral species’ resistance to abiotic plant stresses, this investigation sought to study plant defense against UVA radiation in sun and shade leaves. We predicted that sun leaves would have higher absorbance of UV radiation considering their day-long exposure to sunlight.

UVA (350nm-400nm) absorbance in sun and shade leaves of Heteromeles arbutifolia and Malosma laurina were measured using an integrating sphere. Four leaves from each group were surveyed for reflectance and absorbance. Using the spectrophotometer, reflectance in the green wavelengths (500-600nm) was measured and divided by reflectance in the red (600-700nm) to give a quantitative estimation of the redness …

Adiantum Viridimontanum, Aspidotis Densa, Minuartia Marcescens, And Symphyotrichum Rhiannon: Additional Serpentine Endemics From Eastern North America, T B. Harris, N Rajakaruna

Nishanta Rajakaruna

Serpentine outcrops around the world are known to harbor disproportionately high rates of plant endemism. Remarkable cases of serpentine endemism occur in New Caledonia and Cuba, with 3178 and 920 endemic taxa, respectively, found solely on serpentine. Despite the patchy occurrence of serpentine in eastern North America from Québec and Newfoundland south to Alabama, only one taxon, Cerastium velutinum var. villosissimum, has been broadly recognized as a serpentine endemic for the region. Based on reports in the literature, we suggest that Adiantum viridimontanum, Minuartia marcescens, and Symphyotrichum rhiannon be considered endemic to serpentine soils from the east coast of North …

Biology Of Ultramafic Rocks And Soils: Research Goals For The Future, R S. Boyd, A R. Kruckeberg, N Rajakaruna

Nishanta Rajakaruna

At this, the 6th International Conference on Serpentine Ecology, it seems timely to review briefly the present status of the field and to project the needs for future research. Although a great deal of serpentine research was done prior to 1960, as summarized by Krause (1958) and discussed briefly by Brooks (1987), much of our progress in learning how serpentine geology affects plant and animal life occurred in the mid- to late 20th century. In that era, it was the landmark studies of several scientists worldwide that initiated a meteoric increase in published serpentine research. Key players in setting the …

Advances In Serpentine Geoecology: A Retrospective, N Rajakaruna, R S. Boyd

Nishanta Rajakaruna

No abstract provided.

Vegetable Growing : A Guide For Home Gardeners In Western Australia, Department Of Agriculture, Western Australia

Bulletins 4000 -

DAFWAs popular publication about vegetable growing for home gardeners.

Evolution And Systematic Significance Of Reproductive Structures In The Genus Cuscuta (Dodders, Convolvulaceae): Pollen And Gynoecium, Mark Welsh

Theses and Dissertations (Comprehensive)

The genus Cuscuta (dodders, Convolvulaceae) is one of the most significant lineages of parasitic plants from economic, conservation, and anthropogenic perspectives. Members of the genus are twining stem parasites with no roots, lacking almost completely chlorophyll or its function, and gather required nutrition from their host via specialized haustorial connections. While there are almost 200 described species, problems with species identification exist because many diagnostic characters are restricted to their tiny flowers. Probably contributing to this identification difficulty is the fact that the group has not received taxonomic attention for over 75 years; even knowledge of its basic reproductive biology …

Ecology And Molecular Phylogenetics Of Hydnora (Hydnoraceae) In Southern Africa, Jay Francis Bolin

Biological Sciences Theses & Dissertations

The Hydnoraceae are a clade of root holoparasitic angiosperms that contain two small genera, Hydnora and Prosopanche. This study, focused on Hydnora, presents novel data regarding the pollination biology, germination ecology, parasite-host nutritional relationships, and the molecular systematics of this group. Experimental addition of the primary pollinator, Dermestes maculatus to Hydnora africana chamber flowers demonstrated beetle imprisonment during the carpellate stage. Changes in the inner surfaces of the androecial chamber allowed beetle escape after pollen release. Most beetles escaped, dusted with viable pollen, three days after pollen release. To investigate germination ecology, aqueous root extracts of host and …