Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 10/17/2016
Publication Date: 3/27/2017
Citation: Barnaby, J.Y., McClung, A.M., Adviento-Borbe, A.A., Pinson, S.R.M., Ziska, L.H. 2017. Using rice genetic diversity for adaptions to and mitigation of changing environments. Meeting Abstract. 2nd Agriculture and Climate Change Conference March 26-28, 2017, Melia Sitges, Spain. page 19.
Technical Abstract: Human activities are contributing to greenhouse gas emissions and predictions are that atmospheric CO2 levels will double by the end of the century. Methane, the second most abundant greenhouse gas, is ~25 times more potent in global warming potential than carbon dioxide, and 7-17% of atmospheric methane comes from paddy rice fields. This research investigated how rice plants respond to differences in CO2, and also how different rice varieties vary in methane emissions. It has been reported that elevated atmospheric CO2 levels decrease protein concentration in rice grains. However, the underlying molecular mechanisms of these processes are largely elusive. Five rice varieties known to differ in grain protein contents were grown under ambient and elevated CO2 levels to investigate CO2 effects on genetic diversity of protein content, and a mutant with higher protein content in grain along with its wild type variety were further chosen for transcriptome analysis and harvested at two reproductive stages known to differ in grain protein contents. Furthermore, to understand the genetic relationship of morphological traits with CH4 emissions, as a separate greenhouse study, five high- or low-yielding rice varieties were examined to assess seasonal CH4 profiles as well as anatomical and physiological characteristics. Understanding the genetic control of physiological responses to changing environments is an adaptive strategy to sustain high yield and grain quality but reduce the negative impact of greenhouse gas emissions.