Submitted to: CSA News
Publication Type: Abstract Only
Publication Acceptance Date: 9/20/2019
Publication Date: 11/11/2019
Citation: Echevarria Laza, H.J., Payton, P.R., Mahan, J.S., Emendack, Y., Chen, J. 2019. Physiological Characterization of Maize Inbred Lines under Heat Stress Conditions. CSA News. Oral Presentation. https://scholars.ttu.edu/en/activities/physiological-characterization-of-maize-inbred-lines-under-heat-s
Technical Abstract: Maize (Maize mays L.) plants are very sensitive to high temperatures (heat stress). Heat stress at critical developmental stages of maize plant can cause significant yield loss. Characterization of maize inbred lines for genetic variation in heat tolerance and identification of superior heat tolerance lines for breeding are essential to breed maize hybrids with enhanced heat tolerance. In this study, we evaluated a mini-core of maize inbred lines for their diverse heat stress responses and examined physiological changes in leaf tissues of field-grown maize plants under normal (open field) and heat stressed (heat tent) conditions. The carbon assimilation of young and matured leaves was measured using Licor-6400 and the fast kinetic of chlorophyll fluorescence was measured using a Handy-PEA+ Fluorometer. The findings of this study on the differential physiological responses of these maize inbred lines are presented.