Physiological Response Mechanism and Drought Resistance Evaluation of Passiflora edulis Sims under Drought Stress

作     者：Binyang Zhao Fengchan Wu Guojun Cai Peiyu Xi Yulin Guo Anding Li 

作者机构：College of ForestryGuizhou UniversityGuiyang550025China Guizhou Institute of BiologyGuizhou Academy of SciencesGuiyang550009China College of Resources and EnvironmentHunan Agricultural UniversityChangsha410128China 

出 版 物：《Phyton-International Journal of Experimental Botany》 (国际实验植物学杂志（英文）)

年 卷 期：2024年第93卷第6期

页      面：1345-1363页

核心收录：

学科分类：09[农学] 0902[农学-园艺学] 090201[农学-果树学] 

基　　金：supported jointly by the Science and Technology Project of Guizhou Province(Qian-Ke-He Platform Talents5624) the National Natural Science Foundation of China(31960576) Science and Technology Project of Guizhou Province(Qian-Ke-He SupportGeneral 228)were funded 

主　　题：Drought resistance water stress phytohormone morphological trait physiological traits 

摘      要：In order to explore the response mechanism of Passiflora edulis Sims to drought stress,the changes in morpho-logical and physiological traits of Passiflora edulis Sims under different drought conditions were studied.A total of 7 germplasm resources of Passiflora edulis Sims were selected and tested under drought stress by the pot culture method under 4 treatment levels:75%–80%(Control,CK)of maximumfield water capacity,55%–60%(Light Drought,LD)of maximumfield water capacity,i.e.,mild drought,40%–45%(Moderate Drought,MD)of max-imumfield water capacity,i.e.,moderate drought and 30%–35%(Severe Drought,SD)of maximumfield water capacity,i.e.,severe *** the 40th day of drought treatment,13 indices,including seedling growth mor-phology,physiology,and biochemistry,were *** results showed that under drought stress,the height and ground diameter of *** Sims gradually decreased with increasing drought stress,and there were signifi-cant differences in seedling height and ground diameter among the *** stress significantly inhib-ited the growth of seven *** Sims *** contents of soluble sugar(SS),soluble protein(SP),proline(Pro),and other substances in *** Sims basically increased with increasing drought *** the aggrava-tion of drought stress,the malondialdehyde(MDA)content of *** Sims tended to increase to different degrees,the superoxide dismutase(SOD)activity and peroxidase(POD)activity both tended to increase atfirst and then decrease,and the change in catalase(CAT)activity mostly showed a gradual increasing *** con-tents of endogenous hormones in *** Sims significantly differed under different degrees of drought *** the aggravation of drought stress,the abscisic acid(ABA)content of *** Sims tended to increase,whereas the contents of gibberellin(GA),indoleacetic acid(IAA),and zeatin nucleoside(ZR)exhibited a down-ward trend.A comprehensive evaluation of the drought resistance of seven *** Sim