摘要
通过模拟不同pH值(分别为3.0,4.0,5.0)的酸雨胁迫处理水稻(Oryza sativa)种子和幼苗,以了解酸雨对水稻种子萌发及幼苗生长的影响。结果显示:pH值5.0的模拟酸雨对水稻种子发芽率影响不明显,但pH值4.0和pH值3.0处理下种子萌发率显著下降;幼苗对不同程度的模拟酸雨胁迫均敏感,各生长指标包括叶长、苗高、植株鲜重、不定根数等被显著抑制,且随着pH降低,被抑制程度越甚。试验结果表明,模拟酸雨对水稻种子萌发和幼苗生长发育均有影响,且幼苗阶段较种子萌发阶段对酸雨的影响更为敏感。
The effects of simulated acid rain stress（pH 3.0,4.0,5.0,respectively） on seed germination and seedling growth of rice（Oryza sativa） were analyzed.The results showed that： there was little influence on the seed germination under the simulated acid rain with pH 5.0,but a significant inhibition effect exited under the simulated acid with pH 3.0 and PH 4.0;the rice seedling showed sensitive to all different simulated cid rain stresses,the growth indexes including leaf length,height and fresh weight of seedlings and number of adventitious roots were less than these cultured in the normal condition（CK）,and the inhibition effect increased with decreasing pH of simulated acid rain.The results indicated that,simulated acid rain with different pH values all have effect on seed germination and seedling growth of rice,and the seedlings are more sensitive to the acid rain stress than seeds.
出处
《湖南农业科学》
2012年第1期90-92,共3页
Hunan Agricultural Sciences
基金
湖南科技学院科研项目(09XKYTC030
10XKYTC034)
关键词
模拟酸雨
种子萌发
幼苗生长
水稻
simulated acid rain
seed germination
seedling growth
rice
