Multiple actions of abscisic acid in senescence of oat leaves

Senescence and Cell Death in Plant Development: Chloroplast Senescence and its Regulation

“…Of the five classical growth regulators, ethylene (Warman and Solomos, 1988;Knee, 1991;PhilosophHadas et al, 1994) and abscisic acid are known to accelerate leaf senescence, the latter especially in conjunction with light (Zhi-Yi et al, 1988;Rodoni et al, 1998). In some species the most potent antagonist of cytokinin is jasmonic acid methylester (Ueda et al, 1981) which is regarded to represent a stress hormone produced, for example, under conditions of drought (Sembdner and Parthier, 1993).…”

Effect of irradiation and growth regulators on degradation processes in detached soybean leaves

“…BA inhibited the Incubation of detached leaves with ABA resulted in total degradation of soluble proteins; only the proteins of 32, 19 and 15 kDa were retained (Table 3). ABA increases acid protease formation in light but perhaps decreases it in darkness (Zhi-Yi et al 1988). ABA also inhibits the formation of ethylene and thus may reduce degradation of protein in darkness.…”