摘要
The research used bioassay method to explore seed tolerance of Cd in terms of seed germination and seedling growth. Specifically, 12 rice varieties of three types were investigated under Cd stress, covering germination rate, shooting index, vigor index, seedling and shoot lengths, and fresh weights. The results showed that as Cd concentration grew, seed germination and seedling growth kept increasingly inhibited; germination index, vigor index, root length, shoot length and fresh weights went down; inhibition effects on seed germination and seedling growth were conventional rice〉two-line hybrid rice〉three-line hybrid ,rice. Shanyou 9588, Tianyou 998, Chuanxiang 8, and Y Liangyou 1 performed ~rongly in Cd tolerance; C Liangyou 651, Nei 5 You 263, Xiangwanxian 16, Huanghuazhan, Xiangwanxian 13, and Zhunliangyou 527 performed poorly in Cd tolerance, and Cd tolerance of rest treatments were moderate.
为探明不同类型水稻品种种子萌发及幼苗生长耐Cd性差异,采用室内生物测定方法,研究了不同镉(Cd)胁迫处理对3种不同类型12个水稻品种种子的萌发率、发芽指数、活力指数、幼苗根长、芽长及其根芽鲜质量的影响。结果表明,随着镉离子浓度增加,备类型水稻品种种子萌发所受抑制作用明显增强,萌发率、发芽指数、活力指数、根芽长及其鲜重均表现呈下降趋势:不同类型水稻品种种子萌发及幼苗生长受抑制程度均表现以常规水稻品种>两系水稻品种>三系水稻品种。12个水稻品种中,深优9588、天优998、川香8号、Y两优1号等4个品种耐Cd性较强:C两优651、内5优263、湘晚籼16号、黄华占、湘13号、准两优527等6个品种耐Cd性相对较弱,其它为中等耐Cd品种。
基金
Supported by Loudi City Science and Technology Project(2014-1)
State Key Laboratory of Hybrid Rice
Key Laboratory of Pesticide Harmless Application of Hunan Province~~
作者简介
孟桂元（1977-），男，湖南新邵人。副教授。博士，主要从事作物栽培与生理生态研究，E-mail：mengguiyuan@126．com。通讯作者，助理研究员，在褛博士，主要从事作物栽培与生理生态研究。E-mail：kiki010206@163．com。
