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Articles 1 - 6 of 6
Full-Text Articles in Life Sciences
Physiological Responses To Water Deficit By Sorghum Bicolor Genotypes Varying In Expression Of The Limited Transpiration Trait, Marylou C. Machingura
Physiological Responses To Water Deficit By Sorghum Bicolor Genotypes Varying In Expression Of The Limited Transpiration Trait, Marylou C. Machingura
Georgia Journal of Science
The ability by land plants to partially close their stomata in response to high vapor pressure deficit, called the limited transpiration trait, is a rare phenomenon in crop plants. The characteristic has been demonstrated in several crop species including Sorghum bicolor. The molecular and physiological basis for the limited transpiration trait is however, not clear. This study was conducted to determine the physiological attributes associated with the limited transpiration trait in three sorghum genotypes SC1345, SC35 and Macia. Plants of these three sorghum genotypes were established in a greenhouse and subjected to water deficit stress. Chlorophyll fluorescence and relative …
Effect Of Estrogen Pretreatment On Glial-Like Cell Viability Following Stress Response Hormone Treatment, Bridget N. Smith, Kevin S. Burgess, Kathleen S. Hughes
Effect Of Estrogen Pretreatment On Glial-Like Cell Viability Following Stress Response Hormone Treatment, Bridget N. Smith, Kevin S. Burgess, Kathleen S. Hughes
Georgia Journal of Science
The role of steroid hormones is critical in cellular function. Previous studies have found a positive correlation between the endogenous estrogen 17β-estradiol and cellular protection. Conversely, exogenous conjugated equine estrogens provide less protective mechanisms than endogenous hormones, and little is known about the role of estrogens in cellular protection during a stress response. In the present study, we compare the effects of short-term estrogen pretreatments (alone and in combination) on cell viability when cells with glial cell morphology are exposed to either epinephrine or cortisol. Results showed that 1 µM 17β-estradiol resulted in decreased cell viability following the epinephrine treatment; …
Avian Reproductive Success Is Associated With Multiple Vegetation Characteristics At An Active Grassland Restoration Site In Central Georgia, Kayla Allen, Katie Stumpf
Avian Reproductive Success Is Associated With Multiple Vegetation Characteristics At An Active Grassland Restoration Site In Central Georgia, Kayla Allen, Katie Stumpf
Georgia Journal of Science
Grassland bird populations are experiencing major declines due to habitat degradation, pesticide use, and fire suppression throughout North America. Large-scale grassland restoration efforts to improve and provide suitable habitat are ongoing, but there is little data on productivity of birds breeding in restored habitats, nor on the impact of specific vegetation characteristics on reproductive success. Since 2005, agriculture fields at Panola Mountain State Park in central Georgia have been undergoing restoration to warm-season grasslands; however, until now, data on nest success or productivity was lacking. The goals of this project were to: (1) quantify reproductive success and (2) determine which …
Macroinvertebrates, Watershed Imperviousness, And A Water Quality Index: A Confluence Of Georgia Adopt-A-Stream’S Volunteer Data, Christopher H. Kodani
Macroinvertebrates, Watershed Imperviousness, And A Water Quality Index: A Confluence Of Georgia Adopt-A-Stream’S Volunteer Data, Christopher H. Kodani
Georgia Journal of Science
The relationship between a stream’s macroinvertebrate community as quantified by Georgia Adopt-A-Stream’s Water Quality Index and the impervious surface of an adopted stream’s watershed was weak. Although the average WQI decreased with increasing watershed imperviousness, the R2 was only 8.3%--an admittedly poor fit. To further investigate, a more comprehensive analysis was performed using forward stepwise regression. This model, which included both imperviousness and the abundance of just 15 out of the 20 kinds of macroinvertebrates, achieved an R2 of 59.4%. Imperviousness alone may not be a good predictor of WQI, but a combination of selected macroinvertebrate data and …
Zebrafish (Danio Rerio) Hoxb6: An Exploration Into The Divergence Of Genomic Dna Sequence And Gene Expression Across Teleost Fishes Post-Genome Duplication, Amber Lynn Rittgers, Pierre Le Pabic, Adam Davis
Zebrafish (Danio Rerio) Hoxb6: An Exploration Into The Divergence Of Genomic Dna Sequence And Gene Expression Across Teleost Fishes Post-Genome Duplication, Amber Lynn Rittgers, Pierre Le Pabic, Adam Davis
Georgia Journal of Science
Hoxb6 is an evolutionarily conserved developmental regulatory gene that functions, in part, to pattern several organs and organ systems within the embryonic trunk during vertebrate embryogenesis. The cis-regulatory circuitry mediating trunk expression in mouse (Mus musculus) may be conserved across gnathostome vertebrates, as several other species show similar trunk expression patterns, including chicken (Gallus gallus), dogfish shark (Scyliorhinus canicula), and several teleost fishes. A whole genome duplication event that occurred in the lineage leading to teleost fishes has generated at least two Hoxb6 genes, hoxb6a and b6b. Two teleost fishes of the …
Estimating The Size Of Georgia's Resident Canada Goose Population, Gregory D. Balkcom
Estimating The Size Of Georgia's Resident Canada Goose Population, Gregory D. Balkcom
Georgia Journal of Science
Canada geese (Branta canadensis) are an important waterfowl species in Georgia, and are hunted across the state. To meet management objectives, managers need to understand the impacts of hunting regulations on the population of interest. Therefore, reliable population estimates are necessary. Population size can be estimated by various methods, including aerial surveys, ground surveys, or population indices such as the Lincoln Estimator. I used annual estimates of resident Canada goose harvest in Georgia from the U.S. Fish and Wildlife Service’s Harvest Information Program along with banding and recovery data from the Bird Banding Laboratory in a bias-adjusted version …