广西植物2024，Vol.44Issue(8)：1448-1457,10.DOI:10.11931/guihaia.gxzw202303009
不同生境下广西红鳞蒲桃幼苗的生态适应性
Ecological adaptation of Syzygium hancei seedlings in Guangxi in different habitats
摘要
Abstract
In order to understand the adaptation ability of Syzygium hancei seedlings to environmental factors in three different habitats under natural regeneration conditions,the current year's S.hancei seedlings were collected as experimental materials that regenerated in naturally coastal environments of Guangxi,and then antioxidant enzyme activities,soluble sugar(SS)content,malondialdehyde content and photosynthetic pigments in leaves and roots were measured.The results were as follows:(1)Variance analysis(ANOVA)was conducted on multiple environmental factors,which indicated that light intensitIES had highly significant differences,soil surface temperature and water content had not significant differences between the three sample plots.(2)Various light densities resulted in the changes of physiological characteristics of seedling leaves and roots in different habitats.With the light density increasing,superoxide dismutase(SOD)activity,SS content,MDA content,and chlorophyll a/b contents in leaves,and peroxidase(POD)activity in roots of seedlings were significantly higher in Habitat B than those in Habitat A;while POD activity,chlorophyll a,chlorophyll b and total chlorophyll contents in leaves,and SOD activity,SS and MDA contents in roots were higher in Habitat A than those in Habitat B.(3)With light intensity decreasing,seedlings that regenerated in Habitat B represented significantly higher SOD activity and MDA content in leaves,and POD activity in roots than those regenerated in Habitat A;however,these seedlings that regenerated in Habitat A represented significantly higher POD activity and SS content in leaves compared with those regenerated in Habitat B;chlorophyll a,chlorophyll b,total chlorophyll,and SS and MDA contents in roots were significantly higher in Habitat A than those in Habitat B firstly,and then changed to Habitat B being significantly higher than Habitat A;chlorophyll a/b content and SOD activity in roots were significantly higher in Habitat B than those in Habitat A firstly and then changed to Habitat A being significantly higher than Habitat B.Comprehensive analyses show that the physiological and biochemical characteristics of all the three habitats showing different adaptation abilities,in the meanwhile,photoinhibition occurrs in Habitat B with the lowest canopy density,hence,some manual adjusting practices are needed to create a moderate light environment,and to provide a suitable condition for promoting the natural regeneration of seedlings.关键词
红鳞蒲桃/抗氧化酶/渗透调节/光合色素/适应性Key words
Syzygium hancei/antioxidant enzymes/osmoregulation/photosynthetic pigments/adaptability分类
农业科技引用本文复制引用
赵小雨,招礼军,朱栗琼,莫若果,王燕玲..不同生境下广西红鳞蒲桃幼苗的生态适应性[J].广西植物,2024,44(8):1448-1457,10.基金项目
国家自然科学基金(31260093,31560061) （31260093,31560061）
广西自然科学基金(2013GXNSFAA019057) （2013GXNSFAA019057）
广西林业科技推广示范项目(桂林科研[2022]第1号). （桂林科研[2022]第1号）
