河南农业大学学报2024，Vol.58Issue(6)：928-935,8.DOI:10.16445/j.cnki.1000-2340.20240430.002
白花泡桐叶片和细根对干旱胁迫的协同响应
Coordinated responses of Paulownia fortunei leaves and fine roots to drought stress
摘要
Abstract
[Purpose]The objective of this experiment was to explore the rules and mechanisms of syn-ergistic response of Paulownia fortunei leaves and fine roots under drought stress.[Method]The expe-rimental material was Paulownia fortunei seedlings.Several potted seedlings were selected,and a water control method was adopted to set up three water treatment gradients:normal water supply,mild drought and severe drought.The synergic response mechanism of leaves and fine roots of Paulownia seedlings under drought stress was studied.[Result]With the increase of drought degree,the vein di-ameter of Paulownia remained unchanged,while the vein density continued to decrease,and the leaf nitrogen content increased.Vein density was negatively associated with root respiration rate,specific leaf area and leaf nitrogen content,while it was positively associated with leaf thickness.Root respira-tion rate was negatively associated with leaf thickness,and positively associated with specific leaf area and leaf nitrogen content.[Conclusion]The carbon transport characteristics represented by leaf veins drive the coordinated responses of aboveground and underground organs of Paulownia paulownia to drought,and the optimization of leaf vein traits can be considered in future germplasm improvement and utilization of Paulownia paulownia.关键词
干旱胁迫/叶片经济学性状/叶片水力学性状/根呼吸速率Key words
drought stress/leaf economic traits/leaf hydraulics traits/root respiration rate分类
农业科技引用本文复制引用
刘新宇,李湘,郭冰林,孔德良,范国强,赵振利..白花泡桐叶片和细根对干旱胁迫的协同响应[J].河南农业大学学报,2024,58(6):928-935,8.基金项目
国家自然科学基金项目(32171746) （32171746）
河南农业大学高层次人才引进启动费项目(30500854) （30500854）
河南省留学人员科研择优资助经费项目(30602423) （30602423）
