Botany Commons^™

Oregon State Rank Assessment For Deschutes Milkvetch (Astragalus Tegetarioides), Nora Dunkirk, Gabriel Campbell, Sue Vrilakas

Institute for Natural Resources Publications

Oregon state conservation status assessment for Deschutes Milkvetch (Astragalus tegetarioides) using NatureServe methodology, 2026.

Afforestation Strategies In Semi-Arid Mediterranean Ecosystems: Experimental Evidence From Chmistar, Lebanon, Ahmad Saker, Mohammad Saleh, Wael Mostafa, Safaa Baydoun, Jamilah Borjac, Dalia El-Badan

BAU Journal - Science and Technology

The success rate of broadleaf tree growth in semi-arid Mediterranean environments is reduced in afforestation operations constrained by water scarcity, shallow soil depth, and intense competition from herbaceous vegetation. This study, conducted between 2022 and 2024 in Chmistar, East Lebanon, using a completely randomized block design, aimed to evaluate the impact of three planting broadleaf trees techniques (traditional digging pits , hoedad tools, and auger digging) and four effective vegetation control (herbicide application, mowing,  mulching, and no control) on the early growth of three native broadleaf tree species (Pistacia palaestina, Quercus calliprinos, and Quercus infectoria ).

The …

Exploring The Relationship Between Tree Dbh And Lichen Cover On Coast Redwood, Grace M. Personeus, Sierra Gittleman, Alisa A. Zarattini

IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt

We investigated the relationship between Diameter at Breast Height (DBH) and lichen cover on coast redwood (Sequoia sempervirens) to see if larger trees had higher percentages of cover. We measured cover using 10 cover classes on the southeastern and southwestern sides of trees in a secondary growth forest. We found a significant relationship between DBH and cover, yet no significant difference between the two sides measured. We suggest that further research with a larger sample size and more varied age classes will provide further insight into the relationship.

Oregon State Rank Assessment For Willamette Navarretia (Navarretia Willamettensis), Nora Dunkirk

Institute for Natural Resources Publications

Oregon state conservation status assessment for Willamette Navarretia (Navarretia willamettensis) using NatureServe methodology, 2026.

Scientific Note: Here The Whole Time: A Revised Understanding Of White Alumroot (Heuchera Alba, Saxifragaceae) In The Susquehanna River Valley., Anais Barnes, Madeline Wickers, Scott Schuette, Tanisha M. Williams, Ryan Folk, Christopher T. Martine

Faculty Journal Articles

Heuchera alba and H. pubescens (Saxifragaceae) are closely related species of alumroot endemic to the Appalachian region of eastern North America that can be difficult to distinguish morphologically. Heuchera pubescens has been understood to occupy a range from Kentucky to Pennsylvania, with the distribution of H. alba restricted to Virginia and West Virginia—plus a recently-recorded extension into Pennsylvania discovered with the help of social media. The uncovering of H. alba in Pennsylvania has challenged historical perceptions of Heuchera distributions in the state, particularly as this relates to the current concept of H. pubescens which may be in need of revision. …

Soil Health Analysis (Lesson 2), Mara Johnson, Madhav P. Nepal, Jiyul Chang

iLEARN Teaching Resources

In this lesson, students will build on the previous lesson (reading and analyzing the Three Sisters chapter from Braiding Sweetgrass) by experimenting on soil in their schoolyard. Students will collect soil samples from multiple locations around their school grounds and evaluate soil texture, structure, infiltration, color, organic matter, and pH. Students Through field observations and laboratory analysis, students examine how soil characteristics influence plant growth and ecosystem health. Students connect modern soil science with Indigenous agricultural knowledge, particularly the Three Sisters planting system described in Braiding Sweetgrass by Robin Wall Kimmerer. By exploring how healthy soil supports sustainable agriculture, …

Oregon State Rank Assessment For Straggling Gilia (Allophyllum Gilioides), Lindsey K. Wise

Institute for Natural Resources Publications

Oregon state conservation status assessment for Straggling gilia (Allophyllum gilioides) using NatureServe methodology, 2026.

Investigating Cryptic Diversity In The Hawaiian Endemic Plant, Psychotria Mariniana (Rubiaceae), Uyen Thi Hoang Nguyen

Master's Theses

Islands, with their isolation and steep environmental gradients, serve as natural laboratories for studying speciation. Molecular phylogenetic and population genetic methods utilizing Next-Generation Sequencing (NGS) have revolutionized our ability to document patterns of genetic divergence and diversity. Cryptic diversity, genetically distinct populations that were previously unrecognized as unique, and cryptic speciation, where divergent genetic populations may be deserving of status as unique species, have been observed in many taxa. The Hawaiian Islands provide an ideal setting for studying divergence and speciation due to their extreme isolation, known ages, and volcanic origin. Previous work has investigated the evolutionary relationships of the …

Cover And Contents

Turkish Journal of Botany

No abstract provided.

Nitrogen Limitation Adaptation (Nla) Modulates Phosphorus And Iron Homeostasis During Boron Toxicity In Arabidopsis Thaliana, Doğa S. Kayihan, Ümi̇t Bariş Kutman, Emre Aksoy, Ceyhun Kayihan

Turkish Journal of Botany

Boron (B) toxicity is a major abiotic stress factor that impairs plant growth and disrupts nutrient homeostasis. The Nitrogen Limitation Adaptation (NLA) gene has been implicated in nutrient regulation; however, its role under B toxicity remains unclear. In this study, the physiological, biochemical, and nutrient responses of wild-type (Col-0) and nla mutant Arabidopsis thaliana were investigated under mild (1 mM H3 BO3 ; 1B) and severe (2 mM H3 BO3 ; 2B) B toxicity conditions. Excess B reduced fresh weight and photosynthetic pigment levels in both genotypes; however, nla mutants exhibited lower malondialdehyde accumulation under 1B, indicating a delayed oxidative …

Genetic Variation In Crops Of The Second Millennium Bce Revealed By Ancient Dna Analysis, Asi̇ye Uluğ, Funda Özdemi̇r Deği̇rmenci̇, Çi̇ğdem Kansu, Christina Luke, Christopher H. Roosevelt, Zeki̇ Kaya

Turkish Journal of Botany

For millennia, the Anatolian plateau has functioned as a major migratory corridor between Africa, Asia, and Europe and has subsequently been shaped by shifting settlement patterns, ranging from small communities to complex urban and imperial systems. These processes were closely associated with the development and diversification of agricultural practices. Archaeobotanical investigations at Kaymakçı, a Middle and Late Bronze Age (ca. 3500 years BP) site located in the middle Gediz Valley of western Anatolia, have provided substantial evidence of crop cultivation in the region. In this study, genetic variation in barley (Hordeum vulgare L.), chickpea (Cicer arietinum L.), bitter vetch (Vicia …

Improved Nutritional Value Of Spinach (Spinacia Oleracea L.) Through Moderate Salinity-Induced Regulation Of Vitamin C And Folate Pathways, Laleh Ahmadi, Hanieh Mohajjel Shoja, Elham Mohajel Kazemi, Maryam Kolahi

Turkish Journal of Botany

Soil salinity is a major abiotic stress affecting over 20% of cultivated and 33% of irrigated lands worldwide, significantly limiting crop productivity and nutrient biosynthesis. Vitamin C and folate are crucial antioxidants in plant stress tolerance and human nutrition; however, their regulation under salt stress remains unclear, particularly in leafy vegetables. This study evaluated the effects of different salinity levels (0, 50, 150, 250, and 350 mM NaCl) on physiological traits, antioxidant activity, vitamin C and folate accumulation, and the expression of related biosynthetic genes in spinach (Spinacia oleracea L.). High salinity (250–350 mM) reduced growth, leaf area, and pigment …

Identification Of Qtls And Molecular Markers Associated With Gray Mold Resistance In Grape, İlknur Polat, İbrahi̇m Çeli̇k, Onur Ergönül, Asli Polat, İlker Kurbetli̇, Görkem Sülü, Ayfer Daldal, Hali̇l İbrahi̇m Uzun

Turkish Journal of Botany

Grape (Vitis vinifera L.) is an economically important fruit that is both consumed fresh from the vine and used in the production of raisins, wine, and vinegar. One of the main factors limiting grape production is gray mold, caused by the fungal pathogen Botrytis cinerea. The cultivation of mold-resistant grape cultivars represents the most effective strategy for disease management; however, molecular tools to aid in the breeding of B. cinerea-resistant grapes remain limited. The present study maps the quantitative trait loci (QTLs) associated with B. cinerea resistance in grape using an F1 population derived from a reciprocal cross between the …

Oregon State Rank Assessment For Wiens' Dwarf Mistletoe (Arceuthobium Abietinum Ssp. Wiensii), Lindsey K. Wise

Institute for Natural Resources Publications

Oregon state conservation status assessment for Wiens' dwarf mistletoe (Arceuthobium abietinum ssp. wiensii) using NatureServe methodology, 2026.

Oregon State Rank Assessment For Bedstraw Broomrape (Aphyllon Epigalium Ssp. Epigalium), Lindsey K. Wise

Institute for Natural Resources Publications

Oregon state conservation status assessment for Bedstraw broomrape (Aphyllon epigalium ssp. epigalium) using NatureServe methodology, 2026.

Evaluating The Impact Of Intercropping Vegetables And Cut Flowers On Yield And Conservation Biological Control, Alliance Igiraneza

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Specialty crops such as vegetables are some of the most susceptible to yield losses and increased management difficulty over time due to pests. One of the potential solutions to this problem, which aims at ensuring the sustainability of the sector, is using conservation biological control practices such as intercropping to increase diversity, while maintaining the economic feasibility and profitability of the system. This study was conducted to evaluate the impact of this management practice using Bell pepper (Capsicum annuum var. King Arthur) as the main crop, intercropped with flowers including zinnia (Zinnia elegans var. Benary’s Giant), sunflower ( …

Forest Overstory Mortality & Recruitment Patterns Eight Years Following Wildfire In The Southern Appalachians, Ruth Cumberland

All Theses

In this study, we investigated patterns of forest overstory mortality and recruitment eight years after wildfire in a large wildfire site the Southern Appalachians, a topic that has not been thoroughly investigated to date. With evidence that pre-fire drought promotes post-fire mortality through impaired physiological function and increased fuel consumption, unknown patterns following wildfire are important to study under shifting climate and land-use conditions. In Chapter 1, three areas of interest were investigated: (a) functional group mortality response to wildfire effects, (b) temporal differences in early (1-3 years) and late (5-8 years) periods of delayed forest overstory mortality patterns following …

Cis-Variant Gene-Expression Association Analysis: A Targeted Approach To Identify Functional Cis-Regulatory Variation, Sofiya Arora

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Phenotypic diversity in plants is largely driven by changes in gene function arising from mutations in both the coding and regulatory regions. Regulatory variation is particularly pervasive because it can fine-tune gene expression without disrupting protein function and is therefore less likely to be strongly selected against in natural populations. As a result, it has played a central role in evolution and domestication. In our previous genome-wide eQTL mapping study in maize, nearly two-thirds of the expressed genes were found to harbor detectable cis-expression quantitative trait loci (cis-eQTLs) with strong local effects on gene expression. Though these cis-variants are widespread, …

Investigating The Taxonomic Uncertainties Of Potentilla Rupincola, Natalie Elizabeth Hieber

Master's Theses

Landscape stewardship is an integral role for land managers that becomes more important when rare or endangered species occur within managed areas. Conservation across the landscape is a primary concern for land managers, but resources allocated for conservation can be limited due to many competing goals. Taxonomic uncertainty surrounding rare and endangered taxa, particularly plant taxa, that have historically been classified solely using morphological features further complicates conservation planning. One such taxon is Potentilla rupincola, a rare plant endemic to the eastern Rocky Mountains in Colorado. For over a century, botanists have debated whether P. rupincola is a distinct species …

Evaluating Fungal Endophytes Inoculation As A Mechanism For Salt Tolerance In Juncus Roemarianus, Rani Badve

Honors Theses

Salinity stress is increasing in coastal and estuarine ecosystems due to increasing temperatures and the reduction of freshwater inputs via precipitation pattern changes. Elevated salinity can negatively affect plant survival, threatening the stability of coastal wetlands and the ecosystem services they provide. Juncus roemerianus is a common and dominant marsh plant in the Northern Gulf Coast that lives in varying salinities. Growing evidence suggests that root-associated fungal endophytes may contribute to enhanced stress tolerance; however, the response of fungal communities to salinity remains poorly understood.

This study evaluated how salinity influences the abundance and diversity of culturable root-associated fungal communities …