LaCl_3对水稻幼苗生长、两种酶的活性及根尖细胞有丝分裂的影响

EFFECT OF LaCl 3 ON SEEDLING GROWTH、ROOT_TIPCELL MITOSIS, ACTIVITIES OF PEROXIDASE AND IAA OXIDASE OF RICE

用不同浓度的ＬａＣｌ３处理水稻种子，结果表明，当ＬａＣｌ３浓度在０．１～１．０ｍｇ／Ｌ时可提高发芽率，促进幼苗生长、根尖细胞有丝分裂指数明显上升，过氧化物酶和吲哚乙酸氧化酶活性下降。但随ＬａＣｌ３浓度提高，则抑制幼苗生长，细胞有丝分裂减缓，两种酶活性均增加。且随浓度提高，其作用效果急剧加大。

The seed germination, seedling growth, the index of root cell mitosis of rice were increased by LaCl 3, when the concentration of LaCl 3 was lower than 1.0 mg/L,and the activities of peroxidase and IAA oxidase were decresed. But the seed germination, seedling growth, root cell mitosis of rice were retarded when the concentration of LaCl 3 was higer than 5.0 mg/L, the activities of both enzymes were increased.