茁长素(auxins) 也称生长素。是一类植物生长激素的统称。天然存在的茁长素类物质有吲哚-3-乙酸、吲哚-3-乙醛、吲哚-3-乙腈、抗坏血酸等。
这些花蕾本身也会产生茁长素。
这项新的研究显示侧边的芽体无法将它们的茁长素输送到主茎秆是因为主干内太过饱和了。
The new research shows that the buds on the side cannot export their auxin into the main stem because it is too full.
自1930S起,研究人员就了解到生长旺盛的植物顶梢会释放出一种被称为茁长素的激素。
Researchers have known since the nineteen thirties that the actively growing tip of a plant releases a hormone called auxin.
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