Effects of Silicon at Different Concentrations on Morphology and Photosynthetic Physiological Mechanism of Japonica Rice  

研究不同硅浓度对粳稻形态和光合生理机制的影响(英文)

作　　者：陈亮[1] 蔡丽萍[1] 周彬 石妍[1] 饶梦[1] 

机构地区：[1]湖北师范学院生命科学学院,湖北黄石435002 [2]湖北省广播电视大学阳新分校,湖北阳新435200

出　　处：《Agricultural Science & Technology》2012年第9期1877-1880,1907,共5页农业科学与技术（英文版）

基　　金：Supported by Outstanding Young and Middle-aged Talent Program of Hubei Provincal Department of Education(Q20102501)~~

摘　　要：[Objective] The aim was to explore effects of silicon at different concentrations on morphology and photosynthetic physiological mechanism of japonica rice. [Method] Seedlings of japonica rice were treated with silicon at different concentrations （0, 30, 80, 130 and 180 mg/L of sodium silicate）; silicon contents were measured with Molybdenum blue spectrophotometric method in root, stem and leaf; plant height, root length and number in different treatment groups were measured with tools; chlorophyll a and b, and a/b in leaf and stem of rice in different groups were measured. [Result] Silicon contents in vegetative organs were as follows： stem〉leaf〉 root; when silicon was 80 mg/L, japonica ecotype was shortest; when silicon was 30 mg/L, root length of the rice was shortest and root number was least; when silicon was 30 mg/L, contents of chlorophyll a and b were highest and chlorophyll a/b achieved the peak when silicon was 80 mg/L. [Conclusion] Silicon at proper concen- tration would improve lodging-resistance and efficiency of photosynthesis, further enhancing yield of japonica rice.[目的]为了探究不同硅浓度对粳稻形态和光合生理机制的影响。[方法]用不同硅浓度(0、30、80、130、180mg/L硅酸钠溶液)处理粳稻幼苗。采用钼蓝比色法测定不同硅浓度处理组水稻根、茎、叶的硅含量,使用测量工具测量不同硅浓度处理组水稻的株高、根长、根系数目,采用丙酮提取法测定不同硅浓度处理组水稻叶、茎的叶绿素a、b的含量以及叶绿素a/b值。[结果]粳稻营养器官中硅含量从高到低依次是:茎>叶>根;当硅浓度为80mg/L时,粳稻株高最矮;当硅浓度为30mg/L时,粳稻的根长最短,跟系数最少;当硅浓度为30mg/L时,叶绿色a、b的含量均最高,且叶绿素a/b值在80mg/L时达到最大值。[结论]适当的硅浓度可提高粳稻的抗倒伏性以及粳稻的光合作用效率,进而提高粳稻的产量。

关 键 词：Japonica ecotype Silicon concentration Morphological characteristics Photosynthetic efficiency 

分 类 号：S511.22[农业科学—作物学]