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 germinatio...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.展开更多
The seedlings of 6 rice varieties were treated with Cd concentrations of 25,50 and 100μmol/L for 5 d.The results showed that the longest root length,seedling height,fresh weight per plant and dry weight per plant of ...The seedlings of 6 rice varieties were treated with Cd concentrations of 25,50 and 100μmol/L for 5 d.The results showed that the longest root length,seedling height,fresh weight per plant and dry weight per plant of 6 rice varieties were significantly inhibited.The inhibiting effects showed a trend as the following:the longest root length>fresh weight per plant>dry weight per plant>seedling height,and the inhibiting effect increased with the increase of Cd stress concentration.It is more economical and reasonable to use 50μmol/L Cd stress concentration to identify Cd tolerance of rice seedlings.And it is more scienti fic to evaluate the Cd tolerance of rice seedling comprehensively by using the 4 indexes of longest root length,fresh weight per plant,dry weight per plant and seedling height.展开更多
基金Supported by Loudi City Science and Technology Project(2014-1)State Key Laboratory of Hybrid RiceKey Laboratory of Pesticide Harmless Application of Hunan Province~~
文摘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.
基金Supported by Changsha Science and Technology Project(kq180103)Hunan Agricultural Science and Technology Innovation Fund Project(2017XC10)Hunan Agricultural Science and Technology Innovation Fund Project(2017JC12)~~
文摘The seedlings of 6 rice varieties were treated with Cd concentrations of 25,50 and 100μmol/L for 5 d.The results showed that the longest root length,seedling height,fresh weight per plant and dry weight per plant of 6 rice varieties were significantly inhibited.The inhibiting effects showed a trend as the following:the longest root length>fresh weight per plant>dry weight per plant>seedling height,and the inhibiting effect increased with the increase of Cd stress concentration.It is more economical and reasonable to use 50μmol/L Cd stress concentration to identify Cd tolerance of rice seedlings.And it is more scienti fic to evaluate the Cd tolerance of rice seedling comprehensively by using the 4 indexes of longest root length,fresh weight per plant,dry weight per plant and seedling height.
