Research on Adaptation of Liquidambar Formosana Hance.Seedlings to Drought and Waterlogging Stress
PEI Yunxia
DAI Miaohong
TANG Xiaoxiao
NI Tianhong
ZHOU Zhongcheng
DU Kebing
Abstract：In order to further understand the adaptation of Liquidambar formosana Hance.to flooding and drought stresses,its seedlings were subjected to three treatments:normal watering(control check),waterlogging stress(partial submergence for 15 days and drainage recovery for 3 days)and drought stress(drought treatment for 15 days and rewatering for 3 days).The changes of phenotype,growth,photosynthetic capacity and physiological characteristics were measured under waterlogging and drought stress.The results showed that compared to the watered plants,the waterlogged plants exhibited hypertrophied lenticels at the base of stem and significantly decreased root-shoot ratio,while the biomass and leaf phenotype did not change significantly.Slight fluctuations were observed in the indexes of leaf gas exchange,chlorophyll fluorescence parameters,malonaldehyde(MDA)content,soluble sugar(SS)content,proline(Pro)content,relative membrane permeability(RMP),absolute water content(AWC),chlorophyll contents and root metabolites.All plants survived until the end of the experiment,indicating a mild damage.In summary,Liquidambar formosana Hance.was a waterlogging-resistant tree species.Under drought stress,seedling height and root-collar diameter growth slowed down,and the biomass decreased significantly,coupled with slowly growth of leaves and wilting.On the 15th day,substantial changes occurred in the indexes of leaf gas exchange,chlorophyll fluorescence parameters,MDA,SS,Pro,RMP,AWC,chlorophyll contents and root metabolites,and differed significantly with the watered plants.At the end of the experiment,all plants died.That meant 15 days drought seriously affected its growth activity.The results of this study can provide a reference for the cultivation and forestland selection of Liquidambar formosana Hance..
Keywords：Liquidambar formosana Hance.drought stresswaterlogging stressdrought resistancewaterlogging resistanceabiotic stress
Publication Date：2024-12-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 573-581 )