The fertility of pollen, the contents of protein, DNA and RNA, the activities of protease, DNase and RNase in the panicles of maintainer in hybrid rice decreased when the maintainer was treated with ACC or ethrel.

• 用ACC处理保持系会降低花粉的可育度， 使其幼穗中蛋白质、DNA 和RNA 含量以及蛋白酶、RNA 酶和DNA 酶活性下降；