Physical Sciences and Mathematics Commons^™

Dormant-Season Carbon Fluxes In Humid-Temperate Pastures, Howard Skinner

IGC Proceedings (1997-2023)

Human induced increases in atmospheric CO₂ through the burning of fossil fuels and deforestation are considered to be a primary cause of rising global temperatures. However, carbon sequestration by terrestrial ecosystems has reduced the rate of CO₂ accumulation in the atmosphere. Because of their vast size, grazing lands have the potential to sequester significant quantities of carbon, slowing the increase in atmospheric CO₂ and reducing the risk of global warming. Although C uptake during the growing season can be substantial, losses following defoliation and drought, and during the winter months can significantly reduce annual sequestration, frequently turning …

Net Photosynthesis Rate And Chlorophyll Content Of Caucasian And White Clover Leaves Under Different Temperature Regimes, A. D. Black, R. J. Lucas, D. J. Moot

IGC Proceedings (1997-2023)

In spring and summer in intensive temperate pastures, Caucasian clover (Cc) (Trifolium ambiguum) has higher dry matter (DM) production rates than white clover (wc) (Trifolium repens) (Black et al., 2003). An examination of the physiological basis for these differences can provide a greater insight into the suitability of Cc for inclusion in temperate pastures. Specifically, leaf photosynthesis rate is a major driver of seasonal growth and is strongly regulated by temperature and chlorophyll content. This study aimed to compare the net photosynthesis rate (Pn) and chlorophyll content of Cc and wc leaves under different temperature …

Identifying Genes Influencing The Efficiency Of Photosynthesis, Jason M. Rivera, Steven Burgess

PRECS student projects

• Photosynthesis adapts to environmental conditions over time.¹

• Varying environmental conditions lead to stress accumulation on the plant.²

• A genetic library has been assembled for forward genetic screening of Arabidopsis thaliana.³

• Arabidopsis Thaliana is a model plant used as a model organism in growth experiments.

• This research project aims to identify and analyze candidate genes that impact the efficiency of photosynthesis.

• These genes can be transplanted into commercial crops to increase efficiency of photosynthesis and crop yields.