Increased seed oil content, decreased abscisic acid sensitivity and/or increased drought resistance in a plant may be accomplished by altering expression of a HIGH-LEVEL EXPRESSION OF SUGAR-INDUCIBLE 2 (HSI2) protein in the plant to thereby increase or decrease expression of HSI2 in the plant compared to a plant grown under similar conditions in which the expression of HSI2 was unaltered. Increasing expression of HSI2 increases oil content while decreasing expression of HSI2 decreases abscisic acid sensitivity and/or increases drought resistance.
