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在正常水分条件下,玉米充分展开新叶中cAMP含量随生育时期而异,前期随植株生长而增加,并于旺盛生长期——雌穗小花分化期上升到峰值,以后随叶龄变老而下降;同一生育阶段,处于旺盛生长和分化发育的器官,如心叶和幼穗,其cAMP含量较高;干旱导致cAMP含量下降,其总趋势是,含量越高,下降幅度越大,对干旱反应敏感;Ca~(2+)(0.25％)和油菜素内酯BR(0.01μg/g)处理有使干旱时叶中cAMP含量增加的效应;叶中ATP含量的变化与cAMP相似。
Under normal conditions of water, the cAMP content in new leaves of full development of maize varied with the growth period, and increased with the growth of plants in the early stage, and peaked at the vigorous growth stage - Decreased; the same growth stage, in vigorous growth and differentiation of organs, such as heart and panicle, cAMP content is higher; drought led to cAMP content decreased, the general trend is that the higher the content, the greater decline in the drought (0.25%) and brassinolide BR (0.01μg / g) increased the cAMP content in the leaves. The content of ATP in leaves was similar to that of cAMP.