外源精胺对盐胁迫下草莓钠钾稳态和光合作用的影响  

Effects of Exogenous Spermine PM on the Sodium-potassium Homeostasis and Photosynthesis of Strawberries under Salt Stress

作　　者：杨逸楠 王丽娟 YANG Yi-nan;WANG Li-juan(College of Horticulture and Landscape Architecture/Tianjin Agricultural University,Tianjin 300392,China)

机构地区：[1]天津农学院园艺园林学院,天津300392

出　　处：《山东农业大学学报（自然科学版）》2024年第4期579-586,共8页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：天津市科技局科技帮扶项目(22ZXBTSN00030);天津市优秀企业特派员项目(23ZYCGSN00540)。

摘　　要：本试验以‘红颜’为材料,采用盆栽方式,研究不同浓度(0、0.3、0.6、0.9mmol·L^(-1))外源精胺(Spermine)对盐胁迫(150mmol·L^(-1)NaCl)下草莓幼苗生长、Na^(+)和K^(+)含量、光合特性的影响。结果表明:外源喷施不同浓度精胺,与NaCl处理相比,显著提高地上部和地下部鲜重、地下部干重、K^(+)含量、叶绿素含量、净光合速率、可溶性糖含量、可溶性蛋白含量和抗氧化酶活性,显著降低Na^(+)含量、丙二醛含量。根据隶属函数综合评价,0.6 mmol·L^(-1)精胺处理的草莓幼苗耐盐性最好,D值为0.27。In this experiment,'Fragaria×ananassa.cv.'Benihoppe',the strawberry cultivar was used to study the effects of exogenous Spermine at different concentrations(0,0.3,0.6,0.9 mmol·L^(-1))on the growth,Na^(+)and K^(+)contents,and photosynthetic characteristics of potted strawberry seedlings under salt stress(150 mmol·L^(-1) NaCl).The results show that exogenous application of different concentrations of spermine significantly increases the fresh weight of both aboveground and underground parts,underground dry weight,K^(+)content,chlorophyll content,net photosynthetic rate,soluble sugar content,soluble protein content,antioxidant enzyme activity and decreases Na^(+)content and malondialdehyde content compared to NaCl treatment.According to the comprehensive evaluation of membership function,0.6 mmol·L^(-1) sperminetreated strawberry seedlings showed the best salt tolerance with a D value of 0.27.

关 键 词：草莓 精胺 盐胁迫 离子含量 光合作用 

分 类 号：S668.4[农业科学—果树学]