水分胁迫下湿地松优良半同胞家系光合色素的响应  

Study on Response of the Contents of Photosynthetic Pigments of Slash Pine's Half-sib under Water Stress

作　　者：童方平[1,2] 方伟[1] 马履一[1] 宋庆安[3,2] 龙应忠[3] 吴际友[3] 易霭琴[3,2] 程勇[3] 

机构地区：[1]北京林业大学 [2]湖南省林木无性系育种重点实验室,长沙410004 [3]湖南省林业科学院

出　　处：《中国农学通报》2006年第11期97-102,共6页Chinese Agricultural Science Bulletin

基　　金：湖南省自然科学基金资助项目"湿地松纸浆材优良家系高产的生理生态机理研究"(05JJ3072)

摘　　要：为研究湿地松半同胞家系光合色素对水分逆境的响应,采用盆栽试验和吸光度测定方法,以湿地松普通种子为对照(CK),测定了七个湿地松优良半同胞家系在弱度水分胁迫(土壤相对含水量为55%￣60%)、中度水分胁迫(土壤相对含水量为35%￣40%)和强度水分胁迫(土壤相对含水量为20%￣25%)条件下的光合色素,对湿地松优良半同胞家系在不同水分胁迫条件下的光合色素进行了研究,结果表明:无论是不同水分梯度还是不同家系水平,Chl、Chla、Chlb、Chla/Chlb、Caro、Caro/Chl均有极显著差异;从正常水分至水分胁迫初期Chl、Chla、Chlb、Chla/Chlb稍微下降,后随着水分胁迫程度的加深下降较快,从正常水分至水分胁迫初期Caro、Caro/Chl先稍微下降,胁迫中期上升,胁迫后期下降;所有半同胞家系的Chl、Chla、Chlb、Chla/Chlb、Caro高于普通种(cK),在水分胁迫条件下家系464、1027的Chl、Chla、Chlb、Chla/Chlb、Caro高于家系的平均水平,家系609、46的Caro/Chl值高于家系的平均水平。在水分胁迫条件下具有较高的光合色素是家系464、1027生长快、产量高的主要生理原因之一。Applied with test of potted plant and measurement absorbency for study response of the contents of photosynthetic pigments of slash pine＇s half-sib under water stress. There are 7 families comparison with general slash pine（ab. CK）. The contents of photosynthetic pigments are mensurated under feebleness water stress while soil water content is 55% to 60% and moderate water stress while soil water content is 35% to 40% and heavy water stress while soil water content is 20% to 25%. The test result indicate that either water grads or families of chlorophyll （Chl） and chlorophyll a （Chla） and chlorophyll b （Chlb） and Chla/Chlb and carotenoid （Caro） and Caro/Chl are mighty notable difference. The Chl and Chla and Chlb and Chla/Chlb little drop from normal soil water to initial water stress. Then drop obvious with increased water stress. The Caro and Caro/Chl little drop firstly from normal soil water to initial water stress,then up in metaphase water stress,after drop in evening water stress. The Chl and Chla and Chlb and Chla/Chlb and Caro of slash pine＇half-sib are over general slash pine. The Chl and Chla and Chlb and Chla/Chlb and Caro of 464 and 1027 are over average value of slash pine＇s half-sib under water stress. The Caro/Chl of 609 and 46 are over average value of slash pine＇s half-sib under water stress. There are high contents of 464 and 1027 under water stress. It is one of the physiology reason with growth fast and high yield of 464 and 1027.

关 键 词：光合色素 水分胁迫 半同胞家系 湿地松 

分 类 号：S718.43[农业科学—林学]