热带亚热带植物学报2024，Vol.32Issue(5)：651-659,9.DOI:10.11926/jtsb.4816
富营养化水体水淹和水淹后干旱对降香黄檀生理生态的影响
Effects of Simulated Eutrophic Waterlogging and Post-waterlogging Drought on the Eco-physiological Characteristics of Dalbergia odorifera
摘要
Abstract
In order to explore the effects of eutrophic waterlogging and post-waterlogging drought on the tolerance of terrestrial woody plants,the control(CK),nutrient(H),waterlogging(W)and eutrophication waterlogging(WH)treatments were set in the first stage.In the second stage,control-drought(CKD),nutrient-drought(HD),watering-drought(WD)and eutrophic watering-drought(WHD)treatments were set up to study the effects of different water and nutrient treatments on the growth and physiology of one-year-old Dalbergia odorifera seedlings.The results showed that D.odorifera had high survival under all treatments;the seedlings exhibited the highest biomass,net photosynthetic rate and total chlorophyll concentration under H treatment.In contrast,both W and WH treatments significantly reduced stem height increment,total biomass,net photo-synthetic rate,stomatal conductance,total chlorophyll content and leaf water potential,but significantly increased the activities of superoxide dismutase(SOD),peroxidase(POD),and contents of H2O2 and soluble protein.Notably,the impact of W stress was more pronounced than that of WH stress.Compared with the first stage,the biomass increment decreased significantly under both of CKD and HD treatments,but which showed the opposite trend under WD and WHD.Furthermore,compared with CKD and HD treatments,net photosynthetic rate significantly increased,while SOD activity and H2O2 content decreased under WD and WHD.Moreover,compared with WD,biomass increment,total chlorophyll content and POD activity increased under WHD,but Car content decreased.Therefore,it was demonstrated that nutrient supply could alleviate the negative effects of waterlogging on seedling growth of D.odorifera to a certain extent,and early waterlogging,especially eutro-phication waterlogging,was conducive to biomass accumulation of seedlings under later drought condition.关键词
降香黄檀/水淹/水淹后干旱/生理生态Key words
Dalbergia odorifera/Waterlogging/Post-waterloggging drought stress/Eco-physiolog引用本文复制引用
李大东,王海波,杨帆,苗灵凤,张娟,郭璐瑶,向丽珊..富营养化水体水淹和水淹后干旱对降香黄檀生理生态的影响[J].热带亚热带植物学报,2024,32(5):651-659,9.基金项目
国家自然科学基金项目(32060240,31660165) （32060240,31660165）
海南省自然科学基金项目(421QN192,421RC1033,320RC507) （421QN192,421RC1033,320RC507）
中国博士后科学基金项目(2023M730895)资助This work was supported by the National Natural Science Foundation of China(Grant No.32060240,31660165),the Project for Natural Science in Hainan(Grant No.421QN192,421RC1033,320RC507),and the Project for Postdoctoral Science of China(Grant No.2023M730895). （2023M730895）
