Botany Commons^™

Impact Of An Herbicide Treatment In An Annual Grass Invaded Sagebrush Steppe, Jordan Dino Santia

Undergraduate Scholarship

Globally, rangelands are being threatened by invasive annual grasses (IAGs) that alter fire regimes, drive vegetation type conversion, and alter ecosystem function. This study evaluates vegetation responses to an Imazapic treatment applied in 2020 to control a population of Taeniatherum caput-medusae, an IAG, that flourished following a severe wildfire in 2013. The site, located on a Bureau of Land Management (BLM) grazing allotment east of Klamath Falls, Oregon, has been monitored annually using the Assessment, Inventory, and Monitoring (AIM) protocol since the Summer of 2022. Over this period, very little T. caput-medusae has been detected while bare ground has …

ผลของสารสกัดหยาบจากเปลือกของประดู่ป่า Pterocarpus Macrocarpus Kurz ต่อฤทธิ์การต้านอนุมูลอิสระและความมีชีวิตของเซลล์มะเร็งลำไส้ใหญ่, ฐิติกานต์ เกตุทอง

Chulalongkorn University Theses and Dissertations (Chula ETD)

มะเร็งลำไส้ใหญ่เป็นหนึ่งในสาเหตุหลักของการเสียชีวิตและการเจ็บป่วยทั่วโลก มีปัจจัยเสี่ยงหลายประการที่ส่งผลต่อมะเร็งลำไส้ใหญ่ หนึ่งในนั้นคือการเปลี่ยนแปลงระดับอนุมูลอิสระของออกซิเจน แม้ว่าการรักษาด้วยเคมีบำบัดจะมีประสิทธิภาพ แต่อัตราความสำเร็จก็ยังค่อนข้างต่ำเนื่องจากเกิดผลข้างเคียงด้านลบหลังการรักษา ประดู่ป่าได้รับการยอมรับว่าเป็นแหล่งของสารสำคัญในด้านการรักษาโรค สารสกัดจากแก่นของประดู่ป่ามีสารประกอบสำคัญคือ homopterocarpin ซึ่งมีคุณสมบัติต้านอนุมูลอิสระและต้านมะเร็งตับ อย่างไรก็ตาม ผลกระทบต่อมะเร็งลำไส้ใหญ่ยังไม่ชัดเจน ในการศึกษานี้ ผู้วิจัยศึกษาผลของสารสกัดหยาบจากเปลือกของประดู่ป่าต่อฤทธิ์ต้านอนุมูลอิสระและความมีชีวิตของเซลล์มะเร็งลำไส้ใหญ่ ตัวอย่างประดู่ป่าถูกเก็บและระบุชนิดในเดือนกุมภาพันธ์ พ.ศ.2568 จากนั้นแช่ตัวอย่างแห้งของเปลือกของประดู่ป่าใน methanol เป็นเวลา 48 ชั่วโมง ตัวอย่าง 20 กรัม ให้สารสกัด 3.79 กรัม การวิเคราะห์ TLC ปรากฏจุดสีแดงเด่นชัดในทุกครั้งของการทดสอบ คาดว่าเป็นสารประกอบหลักของสารสกัดคือ homopterocarpin ฤทธิ์ต้านอนุมูลอิสระของสารสกัดถูกวิเคราะห์ด้วยวิธี DPPH assay และคำนวณค่า IC50 เพื่อประเมินความสามารถในการกำจัดอนุมูลอิสระ ซึ่งอยู่ที่ 45 µg/ml การทดสอบความเป็นพิษของสารสกัดต่อเซลล์มะเร็งลำไส้ใหญ่คือ HCT116 และ SW620 และเซลล์ไตตัวอ่อนของมนุษย์คือ HEK293 ด้วยวิธี MTT assay คำนวณค่า IC50 เพื่อประเมินความสามารถในการกำจัดเซลล์มะเร็งและความเป็นพิษต่อไต ซึ่งมีค่า 91, 32 และ 87 µg/ml ตามลำดับ สารสกัดจากเปลือกของประดู่ป่าแสดงคุณสมบัติต้านอนุมูลอิสระและต้านมะเร็งลำไส้ใหญ่ที่โดดเด่น อย่างไรก็ตาม จำเป็นต้องมีการศึกษาเพิ่มเติมเพื่อศึกษากลไกการออกฤทธิ์ของสารประกอบแต่ละชนิดในสารสกัดนี้

Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 26 2025, Several Authors

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

No abstract provided.

Letter From The Dean, Jeff Edwards

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

No abstract provided.

Phytochemical And Nutritional Composition Of Vernonia Amygdalina: Antioxidant, Antidiabetic Efficacy, And Hematological Benefits, Hassan A. Adewuyi, Messiah Atapia, Emmanuel Ochonung, Sakariyau A. Waheed, Adebimpe H. Oluwatoyin, Chizoba V. Obunadike, Adeleye A. Edema, Samad Hussein, Usman A. Mohammed, Kevin L. Sebastine, Tolulope O. Jaiyeola

Chemistry & Biochemistry Faculty Publications

Vernonia amygdalina, a traditionally used medicinal plant, has been purported to possess health-promoting properties. The aim of this study is to investigate the phytochemical and nutritional composition of V. amygdalina, evaluate its antioxidant and antidiabetic efficacy, and assess its hematological benefits. Phytochemical screening, proximate analysis, antioxidant assays (DPPH, ABTS), antidiabetic evaluations in treptozotocin induced diabetic rats, and hematological assessments were conducted according to standard protocol. V. amygdalina exhibited a rich phytochemical profile, comprising flavonoids, phenolic acids, and terpenoids, alongside significant antioxidant activity (IC50 = 12.5 μg/mL) and complete source of protein. Proximate analysis revealed high protein (21.1%) and …

“Nice To See You”: Addressing Plant Awareness Disparity With Locally Specific Ecological And Cultural Plant Education, Cecilia Muecke

Pomona Senior Theses

Plants form the basis of life on Earth. However, due to the phenomenon of plant awareness disparity, a self-perpetuating cycle whereby plants are overlooked on an individual and global level ensues. Lack of plant awareness leads to a lessened emphasis on plants in sustainability and conservation as well as biology education, resulting in negative impacts on biodiversity and food security. The severity of plant awareness disparity is dependent on cultural context, and Indigenous and/or traditional societies are less likely to experience plant awareness disparity because of they are typically more connected to plants for their everyday needs. Native plants are …

Rwanda's Natural Remedies: A Fresh Look At The Fight Against Malaria, Leandre Nsabimana Ndisanze

Pomona Senior Theses

Malaria remains one of the most devastating parasitic diseases globally, disproportionately affecting sub-Saharan Africa, where Rwanda continues to face high transmission rates and rising resistance to conventional interventions. Despite decades of control efforts, the emergence of drug-resistant Plasmodium falciparum and insecticide-resistant Anopheles mosquitoes threatens to reverse recent gains. This research responds to the urgent need for sustainable and culturally relevant alternatives by exploring the therapeutic potential of Rwandan traditional medicinal plants. These indigenous remedies, long used by local healers, offer an underexplored reservoir of bioactive compounds that may provide the basis for novel antimalarial drugs.

The central hypothesis of this …

A Vascular Flora Of The Sacatar Trail Wilderness, Sierra Nevada, California, Kimberly Schaefer Pivetti

CGU Theses & Dissertations

The Sacatar Trail Wilderness in Inyo and Tulare counties, California, encompasses a bioregional transition zone in the southeastern Sierra Nevada. The ca. 233 km 2 (90 mi 2 ) study area, located 32 km (20 mi) northwest of the city of Ridgecrest, ranges from 930 to 2698 m (3051–8851 ft) in elevation. The highly diverse California Floristic Province, Great Basin, and Mojave Desert converge in the region including the Wilderness creating conditions to support a broad spectrum of vegetation assemblages. The Bureau of Land Management has prohibited vehicular activity in this area since its wilderness designation in 1994; consequently, recent …

Featured Faculty Mentor/Student Team, Kelly Loftin, Eva Berryhill

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

No abstract provided.

Letter From The Faculty Editor, Beth Kegley

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

No abstract provided.

Introduction To Hydroponics- 2025-2026 Workshop Handbook, Stacy A. Adams

Department of Agronomy and Horticulture: Faculty Publications

Hydroponically grown plants grow faster than traditional production systems, with greater productivity, greater palatability, and having optimal visual character. Three principal components of a system include the plant support platform, a nutrient solution reservoir, and an interface for the root-solution. This publication provides in-depth explanation to system design, evaluation of water quality, nutrient formulation, and prototype systems that can be easily constructed for those wanting to explore hydroponics, such as educators, organizational leaders, or home enthusiasts.

The Aussie Oddballs: Identifying The Existence Of Censer And Trample Burr Dispersal In Australian Bush Tomatoes, Abigail Motter

Honors Theses

Australian bush tomatoes in northern Western Australia likely have seed dispersal mechanisms that depend on processes outside of frugivory, which is unusual for this genus. Solanum tudununggae seeds are wind dispersed by the censer mechanism, meaning that seeds fall from holes in the top of the fruit when the branches move. In another species, piles of abscised and burr-like fruits have been found strewn around the bases of S. ossicruentum, possibly due to the extinction of animals that may have been a means of dispersal via epizoochory. In this study, we attempt to provide support for the theorized dispersal …

A Mystery Of Microecology: Revealing The Ecological Relationship Between Allorhizobium Vitis And Missouri Native Grape Species, Hunter White

Graduate Theses/Dissertations

Crown gall disease can be very detrimental to grape and wine producers around the world by reducing vine vigor and yield. It is caused by the bacteria Allorhizobium vitis (A. Vitis) carrying a tumor inducing (Ti) plasmid. The A. vitis bacteria have been found in soil and cane tissues in vineyards around the world, and infect all cultivated grapes. However, there have been no reports of crown gall on native wild grapevines, and very little is known about the ecology of A. vitis in native ecosystems. I have sampled cambium tissues from three native wild grape species of …

The Effects Of Calcium Availability On Growth And Calcium Content Of Hydroponic Daikon Radish Microgreens, Cory Michael Reichmuth

Graduate Theses/Dissertations

Microgreens are young, edible seedlings harvested upon emergence of the first true leaf. Their popularity is growing as a nutritionally dense food source that can be grown quickly in space-efficient systems. However, little is known about optimal cultivation practices and the effects of fertilization on growth and nutrition of microgreens. This study investigates the role of calcium (Ca) fertilization in optimizing the growth, yield, and nutrient content of daikon radish (Raphanus sativus) microgreens. A hydroponic system was designed to consistently deliver nutrient solution to microgreens grown in a closed-environment chamber. This study tested different Ca fertilization rates of 0, 5, …

Assessing Genetic Diversity And Population Structure In The Imperiled Aconitum Reclinatum (White Monkshood), An Endemic Wildflower Of Central Appalachia, Diamanda A. Zizis

Master’s Theses

Aconitum reclinatum, white monkshood (Ranunculaceae), is a Pennsylvania critically imperiled plant species found in five states of the Appalachian region of the United States: Pennsylvania, West Virginia, Virginia, North Carolina, and Tennessee. This plant is adapted to cool, moist environments but faces threats from increasing habitat loss, deer browse, logging, and changes in rainfall and temperature associated with climate change. Comprehensive knowledge of A. reclinatum genetic population structure remains limited. To address this, we collaborated with Natural Heritage programs within the range of A. reclinatum to sample populations across the species distribution and generate a genotyping-by-sequencing data set of …

Phylogenomics And Biogeography Of Zinniinae (Asteraceae: Heliantheae) Using Plastome And Nuclear Datasets, Samuel Victor Skibicki

Graduate Theses, Dissertations, and Problem Reports (ETD)

Zinniinae is a subtribe of plants in the daisy family (Asteraceae) and the sunflower tribe (Heliantheae). Traditionally, seven genera were included in the subtribe: Echinacea, Heliopsis, Philactis, Sanvitalia, Tehuana, Trichocoryne, and Zinnia. The subtribe is poorly understood from a phylogenetic and taxonomic standpoint, and I undertook a phylogenetic investigation of Zinniinae, using both the plastid genome (plastomes) and the nuclear genome, to learn more about the evolutionary history of this clade. Plastomes were assembled to build a phylogenetic tree, targeted sequence capture was used to compile the nuclear datasets, and a chronogram was created to estimate date ranges for …

The Everyday Scientist: Down In The Weeds In The Heart Of The South, Pamela Zendt

Master's Projects

The Everyday Scientist: Down in the Weeds in the Heart of the South is a creative nonfiction capstone project that was released as a book. The narrative documents my two-year journey as a community scientist and explores how ordinary people contribute meaningfully to scientific research in the natural world. Rooted in my desire to connect my passion for the outdoors with the goals of the Master of Arts in Professional Writing program, this project illustrates that environmental science is not only for trained professionals. Instead, it thrives on the curiosity, dedication, and participation of volunteers who follow established protocols, collect …

Greenhouse Management For The Smaller Structure--Educational And Hobby, Stacy A. Adams

Department of Agronomy and Horticulture: Faculty Publications

Greenhouses used for teaching or by hobbyist are smaller than those used for commercial production or found in the retail environment. Structural materials, covering, mechanical equipment, and control systems often are packaged as a kit made available through greenhouse suppliers. Supplier construction services may not be available, in which buyers must use local contractors to complete the installation. Greenhouses are unique structures that differ greatly from sheds or other outbuildings. They have coverings that allow maximum light transmittance, protected from UV degradation, and can handle wide inside to outside temperature extremes. This extension circular provides valuable information on the character, …

Terrarium- An Ecosystem In A Jar, Stacy A. Adams

Department of Agronomy and Horticulture: Faculty Publications

STEM education is supported through hand's-on activities in the classroom. Content understanding and reaffirmation of knowledge is supported through this informative STEM-Quick card that teachers or extension educators can distribute to participants for reference. Terrariums provide an example of a closed ecosystem where water and carbon cycling is demonstrated and plant growth can be observed. This card presents the steps to building and caring for an easy to create terrarium.

Contents, Discovery Editors

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

No abstract provided.