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ARS Home » Southeast Area » Tifton, Georgia » Crop Genetics and Breeding Research » Research » Publications at this Location » Publication #205581

Title: Evaluation of Epidermal Conductance as a Potential Drought Tolerant Trait of Peanut

item MADDIE, S
item Holbrook, Carl - Corley
item KVIEN, C

Submitted to: Multicrop Aflatoxin and Fumonisin Elimination and Fungal Genomics Workshop-The Peanut Foundation
Publication Type: Abstract Only
Publication Acceptance Date: 12/15/2006
Publication Date: 2/1/2007
Citation: Cantonwine, E., Maddie, S., Buchanan, B., Holbrook Jr, C.C., Kvien, C.K. 2007. Evaluation of Epidermal Conductance as a Potential Drought Tolerant Trait of Peanut. Proc. Aflatoxin Elimination Workshop p. 72.

Interpretive Summary: not required

Technical Abstract: Epidermal conductance (ge) is the loss of water vapor from leaves when stomata are closed. An experiment was conducted to compare epidermal conductance values of peanut genotypes with varied levels of field resistance to drought to assess ge as a potential drought response trait in peanut. Epidermal conductance was computed using the equation ge = ('FW/t)*(1/A)*1/(el-ea), where 'FW is change in fresh weight of a detached leaf over time t, A is the area of the leaf, and (el-ea) is the absolute humidity gradient between the leaf and the ambient air inside the measuring chamber. Water loss from leaves occurred linearly after 1 hr. No differences in ge were detected among genotypes or drought response groups. Based on these preliminary results, ge does not appear to vary much across peanut genotypes with different responses to drought.