白花泡桐叶片和细根对干旱胁迫的协同响应OA北大核心CSTPCD

[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.