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始穗后弱光对不同基因型水稻叶片特性的影响
引用本文:任万军,杨文钰,徐精文,樊高琼,王兰英,关华.始穗后弱光对不同基因型水稻叶片特性的影响[J].四川农业大学学报,2002,20(3):205-208,278.
作者姓名:任万军  杨文钰  徐精文  樊高琼  王兰英  关华
作者单位:四川农业大学,农学院,四川,雅安,625014
摘    要:弱光胁迫对始穗后叶片生长有明显影响。弱光下 ,叶片的长度、宽度均比对照高 ,且不同品种反应有差异 ,以D优 6 8受弱光影响增幅最大。遮光 4 9%时 ,各品种的平均LAI比对照高 ,遮光率为 6 9%时 ,LAI比遮光 4 9%有所降低。D优 6 8、冈优 2 2的SLA在低光强下明显增加 ,叶片厚实的Ⅱ优 16 2的SLA在遮荫前期增加而后期减少。叶绿素a、叶绿素b、叶绿素a+b随光强降低而增加 ,Ⅱ优 16 2、D优 6 8叶绿素b比叶绿素a增幅更大 ,叶绿素a/b的值随光强减弱而降低 ,冈优 2 2的叶绿素a/b以遮荫 4 9%时最高。在弱光下 ,叶片相对干物重高于对照 ,Ⅱ优 16 2的增幅低于D优 6 8与冈优 2 2。

关 键 词:水稻  弱光  叶片
文章编号:1000-2650(2002)03-0205-04

Impact of Low-light Stress on Leaves Characteristics of Rice after Heading
REN Wan jun,YANG Wen yu,XU Jing weng,FAN Gao qiong,WANG Lan ying,GUAN Hua.Impact of Low-light Stress on Leaves Characteristics of Rice after Heading[J].Journal of Sichuan Agricultural University,2002,20(3):205-208,278.
Authors:REN Wan jun  YANG Wen yu  XU Jing weng  FAN Gao qiong  WANG Lan ying  GUAN Hua
Abstract:A three replicate, split plot design was used with species as main plot treatments and shading as subplot treatments. Species treatments included Indica hybrid Ⅱ you 162, Dyou 68 and Gangyou 22. Shading treatments began after 10% panicles heading, and subplot treatments were wrapped with one or two layers of 49% shade or 69% shade. The leaves characteristics were measured. The leaves characteristics were obviously affected by the low light stress. The length and the width of leaves under low light stress were greater than those of the control. The average LAI of each species in 49% shade was higher than that of the control, and the LAI of each species in 69% shade was lower than that in 49% shade. The SLA of Dyou 68 and Gangyou 22 increased while the light density decreased. The chla, chlb, chl (a+b) increased, and chl a/b decreased while light density decreased. The relative dry matter weight of leaves in 49% shade or 69% shade was higher than that of the control.
Keywords:RICE  LOW  LIGHT STRESS  LEAVES  
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