摘要
采用水培实验，以ＰＥＧ进行水分胁迫（－０．５ＭＰａ），测定了有磷和缺磷情况下玉米苗期叶片中叶绿素、类胡萝卜素及原叶绿素酸酯随不同胁迫周期的变化。结果表明，水分胁迫时磷能使叶绿素ａ和类胡萝卜素降解减慢，表现为Ｃｈｌａ／ｂ值增大及Ｃｈｌｔ／Ｃａｒｏ值随胁迫周期延长而呈Ｖ．型曲线变化。干旱缺磷能造成原叶绿素酸酯相对积累，是导致Ｃｈｌａ下降的重要因素。水分胁迫下叶绿素ａ，ｂ和Ｃａｒｏ及Ｐｃｈｌ含量均呈下降趋势。
The Changes of contents of cHorophyll(Chl),carotinioid(Caro)andProchlorophyllide(Pchl)under the phosphorus containing and phosphorus-free condi-tions during different water stress periods were determined. The results showed that thecontents of Chl a,Chl b,Caro and Pchl decresed,but with different rates.Thge value of Chl a/b was increased and the change of Chl/Caro appeared in a V-shape.Highly variedwater treatment could decrease the decomposition of photosynthetic pigment.Phospho-rus could efficiently reduce the decrease of Chl a and Caro.Water stress and P-freecould cause the accumulation of Pchl content,which is the main cause that Chl a contentdecreases.
出处
《西北农业大学学报》
CSCD
1996年第4期94-97,共4页
Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)
基金
国家攀登计划9219-5专题资助项目
关键词
水分胁迫
光合色素
磷
玉米
water stress,photosynthetic pigment,phosphorus,maize
