摘要
本文以苹果幼树为试材，采用根系半干旱处理，研究蒸腾流从根系开始上行所经器官、组织脱落酸（ＡＢＡ）浓度的变化规律，试验结果认为，①根系ＡＢＡ浓度的增加是ＡＢＡ浓度整体水平增高的启动因子。②茎木质部汁液所含ＡＢＡ来源于根系和叶片，③叶片下表皮层具有积累ＡＢＡ的能力。
Here young apple trees were selected as experiment matarials and only nearly half of roots were given water during the treatment. We carefully investigated regularity of ABA concen- tration changes in transpiration stream at the different organs and tissues of plant from the root to shoot. The test results indicate : ①Increased ABA concentration in roots causes ABA raising in the whole plant. ②ABA in xylem sap originates from both roots and leaves, and it's concentra- tion is defferent in cross section of xylem ③The back epidermis of leaf possesses the strong abili- ty of collecting ABA.
出处
《北京农学院学报》
1998年第3期19-25,共7页
Journal of Beijing University of Agriculture
关键词
土壤
干旱
木质部汁液
脱落酸
苹果
Drying soil, abscisic acid, xylem sap, young apple
