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Full-Text Articles in Life Sciences
Understanding Floristic Diversity Though A Database Of Greene County Specimens, K. M. Harris, M. B. Foard, T. D. Marsico
Understanding Floristic Diversity Though A Database Of Greene County Specimens, K. M. Harris, M. B. Foard, T. D. Marsico
Journal of the Arkansas Academy of Science
We present a floristic list of Greene County, Arkansas, based on accessioned collections from the Arkansas State University Herbarium (STAR). Currently, there are 1569 specimens representing 540 taxa from Greene County in STAR. Using the USDA Plants Database, plant species were analyzed according to whether or not they are native to the state as well as whether or not they have been previously documented as species occurring in the county. Having analyzed all the Greene County collections from STAR, we found 225 previously undocumented species. The data suggest that most of the specimens in the STAR collection were found in …
Effects Of Light Limitation On Plant-Rhizobia And Plant-Mycorrhiza Interactions, Jess A. Millar
Effects Of Light Limitation On Plant-Rhizobia And Plant-Mycorrhiza Interactions, Jess A. Millar
Anthós
Plants respond with a sink stimulation of photosynthesis when colonized by bacterial and fungal mutualists, which compensates for costs of carbohydrate allocation to the microbes. Problems may arise when light is limited and plants cannot increase photosynthesis. We hypothesize that under such conditions the costs for maintaining the mutualism outweigh the benefits, which ultimately turns the beneficial microbes into parasites exploiting resources and reducing host fitness. We study these plant-‐microbe interactions under different light availabilities using lima bean plants, rhizobia (nitrogen-‐fixing bacteria), and mycorrhizal fungi. In our study, we apply two levels of light (full light and light intensity reduced …