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ARS Home » Southeast Area » Dawson, Georgia » National Peanut Research Laboratory » Research » Publications at this Location » Publication #310560

Research Project: Developing Strategies to Identify Useful Genes in Peanut and Breeding High Yielding Peanut Varieties and Germplasm

Location: National Peanut Research Laboratory

Title: Soluble Leaf Carbohydrates as Indicators of Drought-Stress Response in Runner Peanuts

item ROY, MIMI - Auburn University
item Dang, Phat
item CHEN, CHARLES - Auburn University
item HOWE, JULIE - Auburn University

Submitted to: American Peanut Research and Education Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/1/2014
Publication Date: 7/1/2014
Citation: Roy, M., Dang, P.M., Chen, C., Howe, J. 2014. Soluble Leaf Carbohydrates as Indicators of Drought-Stress Response in Runner Peanuts. American Peanut Research and Education Society Abstracts.

Interpretive Summary: none required

Technical Abstract: Increasingly warmer and drier conditions in the southeastern United States pose problems for peanut production, especially where irrigation is not available. Peanut has a natural tolerance to short-term drought; however, development of peanut cultivars with improved tolerance to drought could alleviate concerns regarding increasingly warmer and drier conditions and the effect on water usage in peanut production. In response to drought stress, plants accumulate soluble sugars (e.g., glucose, fructose, and sucrose) in their leaves in order to enhance osmotic potential and water uptake in the plant. Evaluation of leaf sugars can be used as an indicator of drought stress response. Soluble sugars in the leaf and phenotypic expression were evaluated in an F2 population of 249 runner peanut breeding lines under rain-out shelter plots with mid-season stress. Results indicate that there were significant different fructose accumulations among genotypes ranging from 2.7ug/g to 664ug/g while no differences were detected by ANOVA for glucose and sucrose accumulations. More interesting, the fructose accumulations are corresponding to phenotypic expression readings.