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冬小麦光合功能对盐胁迫的响应
引用本文:朱新广,王强,张其德,卢从明,匡廷云.冬小麦光合功能对盐胁迫的响应[J].植物营养与肥料学报,2002,8(2):177-180.
作者姓名:朱新广  王强  张其德  卢从明  匡廷云
作者单位:1.中国科院植物研究所光合作用基础研究开发实验室 北京100093
基金项目:国家重点基础研究发展规划项目(G1998010100);光合作用基础研究开放实验室创新资金资助.
摘    要:研究了冬小麦 (Triticum aestivum L. )光合功能对盐胁迫的响应。结果表明 ,盐胁迫 ,尤其是高浓度NaCl(400mmol/L)的胁迫 ,大大降低单位面积叶绿素 (Chl)的含量、叶绿体对光能的吸收能力、PSII电子传递速率、原初光能转化效率以及光化学荧光猝灭系数 (qP) ,同时降低光合放氧速率及其光饱和点 ,使植物更易受到光抑制。这些结果加剧光合放氧和碳同化能力的下降 ,不利于光合产物的积累 ,是生长在盐碱地上作物低产的重要生理原因之一。

关 键 词:冬小麦    盐胁迫    放氧速率    电子传递速率    原初光能转化效率
文章编号:1008-505X(2002)02-0177-04
修稿时间:2001年7月11日

Response of photosynthetic functions of winter wheat to salt stress
ZHU Xin guang,WANG Qiang,ZHANG Qi de,LU Cong ming,KUANG Ting yun.Response of photosynthetic functions of winter wheat to salt stress[J].Plant Nutrition and Fertilizer Science,2002,8(2):177-180.
Authors:ZHU Xin guang  WANG Qiang  ZHANG Qi de  LU Cong ming  KUANG Ting yun
Affiliation:1.Lab of photosyn Basic Res;Inst of Botany;CAS;Beijing 100093;China
Abstract:The response of photosynthetic functions of winter wheat to salt stress was studied in this paper The results showed that the chlorophyll content per unit area of leaves, the capacity of light energy absorption of the chloroplasts, the electron transport rate of PSII, the efficiency of primary conversion of light energy and the coefficient of photochemical fluorescence quenching (qP) were greatly reduced by salt stress, especially NaCl of high concentration (400 mmol/L) At the same time, photosynthetic oxygen evolution rate and its light saturation point was decreased, and photoinhibition was exacerbated by salt stress These results accelerated the decrease of the capacity of oxygen evolution and carbon assimilation Therefore, plants could not effectively accumulate photosynthetic products This is one of the important physiology causes of low yield of crops grown in saline alkali soil
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