The paper studied effects of GA_3 and IAA on cellulase activity in abscission zone from petiole of primaryleaves of bean, cotyledon petioles and boll petioles of cotton.
The soybean primaryleaves developed from 7 layers of original cells, and 3-4 layers of palisade cells(PSC)and 2 layers of paraveinal Mesophyll cells (PVM) were formed in these leaves.
大豆初生叶一般由7层原始细胞发育而成,通常形成3—4层栅拦细胞及2层脉侧叶肉细胞。
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The increasing rate of width and length of primaryleaves decreased obviously after 10 days planting. The leaves got their maximum areas after 15 days while L. sative was just at the 3nd instar stage.