海藻糖对干旱胁迫下白桦生长和生理特性的影响  

Effect of Trehalose on the Growth and Physiological Characteristics of Betula Platyphy under Drought Stress

作　　者：杨杰 Yang Jie(Wangtao Forest Farm,National Forest Administration Bureau of Taiyuan Mountain in Shanxi Province,Changzhi 046500,China)

机构地区：[1]山西省太岳山国有林管理局王陶林场,山西长治046500

出　　处：《山西林业科技》2024年第4期11-13,17,共4页Shanxi Forestry Science and Technology

摘　　要：在盆栽条件下,设置无干旱胁迫对照(S1)、干旱胁迫对照(S2)、干旱胁迫+6 mmol/L海藻糖(S3)、干旱胁迫+12 mmol/L海藻糖(S4)、干旱胁迫+18 mmol/L海藻糖(S5)5个处理,研究了干旱胁迫下人工喷施海藻糖对白桦生长和生理特性的影响。结果表明,干旱胁迫显著降低了白桦的株高、茎粗、生物量、叶绿素含量和净光合速率,但提高了其SOD活性、POD活性和MDA含量。喷施海藻糖提高了干旱胁迫下白桦的株高、茎粗、生物量、叶绿素含量和净光合速率,提高了其SOD活性、POD活性,降低了其MDA含量。综合比较来看,12 mmol/L是缓解白桦干旱胁迫并促进苗木生长的适宜海藻糖浓度。5 treatments including non-drought stress control(S1),drought stress control(S2),drought stress+6 mmol/L trehalose(S3),drought stress+12 mmol/L trehalose(S4)and drought stress+18 mmol/L trehalose(S5)were set up under potted conditions to study the effects of artificial spraying of trehalose on the growth and physiological characteristics of Betula platyphy under drought stress.The results showed that drought stress significantly reduced the plant height,stem thickness,biomass,chlorophyll content and net photosynthetic rate of Betula platyphy,but increased its SOD activity,POD activity and MDA content.Spraying trehalose increased the plant height,stem diameter,biomass,chlorophyll content and net photosynthetic rate of Betula platyphy under drought stress,increased its SOD activity and POD activity,and reduced its MDA content.Overall,12 mmol/L was the appropriate concentration of trehalose to alleviate drought stress and promote seedling growth in Betula platyphy.

关 键 词：海藻糖 干旱胁迫 白桦 生长 生理特性 

分 类 号：S792.153[农业科学—林木遗传育种]