Change of arginine content and some physiological traits under midseason drought in peanut genotypes with different levels of drought resistance

Abstract

Peanut production areas frequently suffer from drought, which can cause severe yield losses, increased aflatoxin, andcompositional changes in seed. Midseason drought is generally the most detrimental to seed yields and in altering seed proteincomposition. The purpose of this study was to investigate the effect of midseason drought on arginine content in peanut genotypeswith different levels of drought resistance. The experiment was conducted under field conditions for 2 years. Two water regimes (wellwatered conditions and no irrigation during 30–60 days after planting) were assigned as main plots, and five peanut genotypes werearranged in subplots. Arginine content of mature peanut seed was analyzed at harvest. Midseason drought increased arginine content inall genotypes in both years. Variation in arginine content among peanut genotypes also indicated the possibility for breeding programsto improve arginine content in peanut.