棉花果枝韧皮部同化物运输与水分伴随运移定量关系的示踪动力学研究  

TRACER KINETICS RESEARCH ON THE QUANTITIVE RELATIONSHIP BETWEEN PHOTOSYNTHATE AND WATER TRANSPORTATION IN THE PHLOEM

作　　者：刘新[1] 葛才林[1] 罗时石[1] 马飞[1] 龚荐[1] 

机构地区：[1]江苏农学院基础部

出　　处：《江苏农学院学报》1998年第3期33-36,共4页Jiangsu Agricultural Research

基　　金：国家自然科学基金

摘　　要：带库棉花果枝的韧皮部与木质部基部不分离，通过韧皮部引入１４Ｃ－蔗糖溶液（５％）、木质部引入３Ｈ－Ｈ２Ｏ的双标记技术所作的研究表明，同化物在韧皮部中以液流形式运输，液流中的水主要来源于木质部，运输一定量的１４Ｃ－同化物需一定量的３Ｈ－Ｈ２Ｏ。由ＬＳ－９８００液闪仪测出韧皮部中１４Ｃ－同化物的放射性计数和对应ＣａＯ中３Ｈ－Ｈ２Ｏ的放射性计数，由此计算出韧皮部运输的同化物的量（Ｙ）与伴随运移水分的量（Ｘ）之间的定量关系为：Ｙ＝０．１０７７３Ｘ。By using the double tracer, drawing 14 C sucrose into phloem of cotton stem and 3H water into xylem of cotton stem were researched in this experiment. The photosynthate transports in phloem by liquid form and the water of the liquid mainly comes from the xylem. The result shows that the photosynthate and the water from xylem transportation in phloem are closely interrelated, and the quantitive relationship is Y=0 10773X .

关 键 词：同化物运输 韧皮部 棉花 果枝部 水分运移 

分 类 号：S562.01[农业科学—作物学]