热带亚热带植物学报2025，Vol.33Issue(2)：197-206,10.DOI:10.11926/jtsb.4875
旱-盐复合胁迫对降香黄檀幼苗生长和生理生化特性的影响
Effects of Combined Drought and Salt Stress on Growth,Physio-chemical Characteristics of Dalbergia odorifera Seedlings
摘要
Abstract
In order to explore the effects of drought-salt combined stress on the growth,physio-chemical characteristics of terrestrial woody plants,pot experiments were conducted in drought-salt combined stress(SD),the growth,photosynthetic pigment content and physiological and biochemical indexes of Dalbergia odorifera seedlings with three planting densities[1 plant(DI),2 plants(DII)and 3 plants(DIII)per pot,respectively]were studied under 25%-30%field water capacity+150 mmol/L NaCl.The results showed that SD treatment significantly inhibited the growth of plant height,basal diameter,total leaf area,taproot length,total chlorophyll content and relative water content at DI density,but increased the activities of catalase and glutathione reductase(GR),soluble protein and soluble sugar content.Compared with DI density,DIII density further reduced GR activity and reduced glutathione content,resulting in inhibition of seedling growth.Therefore,under the combined drought and salt stress environment,planting density would affect the growth of D.odorifera,and low density planting mode should be considered in the coastal zone.关键词
干旱胁迫/盐胁迫/种植密度/生长性状Key words
Drought stress/Salt stress/Planting density/Growth trait引用本文复制引用
周静静,苗灵凤,李大东,田梦洁,杨帆..旱-盐复合胁迫对降香黄檀幼苗生长和生理生化特性的影响[J].热带亚热带植物学报,2025,33(2):197-206,10.基金项目
海南省自然科学基金高层次人才项目(421RC1033,322RC578)资助This work was supported by the Project for High-level Talents of Natural Science in Hainan(Grant No.421RC1033,322RC578). （421RC1033,322RC578）
