红花草莓‘托斯卡纳’盐胁迫下的生长发育及生理响应  

Growth and Physiological Responses of Red-flowered Strawberry‘Toscana’Under Salt Stress

作　　者：张伟[1] 陈毓蔚 牛亚菲 冯悦 侯非凡 亢秀萍[1] ZHANG Wei;CHEN Yuwei;NIU Yafei;FENG Yue;HOU Feifan;KANG Xiuping(College of Horticulture,Shanxi Agricultural University,Taigu,Shanxi 030801)

机构地区：[1]山西农业大学园艺学院,山西太谷030801

出　　处：《北方园艺》2023年第13期28-35,共8页Northern Horticulture

基　　金：山西省基础研究计划青年科学研究资助项目(SXBYKY2021079);山西省高等学校科技创新资助项目(2021L117)。

摘　　要：以红花草莓品种‘托斯卡纳’匍匐茎苗为试材,采用盆栽法研究盐胁迫对草莓生长状况及生理特性的影响,测定3个NaCl浓度处理后第7、14、21天和第28天的株高、根长、叶面积及耐盐性指数等生长指标,确定其盐害级别,同时测定电导率(REC)、丙二醛(MDA)、可溶性糖(SS)、可溶性蛋白质(SP)、脯氨酸(Pro)含量、超氧化物歧化酶(SOD)、过氧化物酶(POD)活性7个生理指标,研究盐害对‘托斯卡纳’植株生长、质膜透性、渗透调节物质、抗氧化酶活性的影响,以期探究红花草莓对盐胁迫的生长发育和生理响应,并为红花草莓生理响应盐胁迫提供参考依据。结果表明:红花草莓‘托斯卡纳’叶片的盐害症状随NaCl浓度的升高而越显著。100 mmol·L^(-1)NaCl处理下,14 d时叶片出现轻度盐害症状,盐害等级Ⅰ级,表现为叶片边缘呈萎蔫状,但未失绿,植株生长正常;200、400 mmol·L^(-1)NaCl处理下,叶片在第14天时开始出现中度盐害症状,盐害等级达Ⅱ级,株高、叶面积的生长均受到显著抑制;盐处理显著引起了红花草莓的生理变化,‘托斯卡纳’的REC前1周内剧烈上升;各盐胁迫浓度下MDA含量差异显著,也呈上升趋势;叶片SS、SP、Pro含量与SOD、POD活性均随胁迫时间延长呈先上升后下降的趋势。相关性分析表明,REC与MDA含量、SOD活性呈显著正相关,与植株生长指标呈显著负相关;Pro含量与SS、SP及植株生长指标均呈显著正相关,与REC和MDA含量呈显著负相关。Taking the stolon plants of‘Toscana’strawberry as experimental material,treated with three concentrations of NaCl,at the 7th,14th,21th and 28th days after treatment,the salt damage level of red-flowered strawberry were observed,and the effects of different salt concentrations on the growth of strawberry,plasma membrane permeability,osmotic regulators and antioxidant enzymes were investigated,including the plant height,leaf area,electrical conductivity,malondialdehyde,proline,soluble protein,soluble sugar,superoxide dismutase,peroxidase,in order provide reference for the physiological response of red-flowered strawberry to high salt stress,which has a great significance for the innovative utilization of it.The results showed that the symptoms of salt damage on the‘Toscana’became significant with the increase of NaCl concentration.Under the treatment of 100 mmol·L^(-1),the leaves showed slightly salt damage symptoms at the 14th day with the salt damage gradeⅠ,which showed that the leaf edge was wilting,but no chlorosis,and the plants grew normally.Under 200 mmol·L^(-1)and 400 mmol·L^(-1)NaCl,the leaves began to show moderate salt damage symptoms at the 14th day with the salt damage gradeⅡ,and the growth of plant height and leaf area of‘Toscana’were significantly inhibited.Salt treatment significantly caused the internal physiological changes of redflowered strawberry,and the REC increased quickly in the one week.The content of MDA also showed an upward trend.The activities of SS,SP,Pro contents,SOD and POD activities increased firstly and then decreased with the extension of stress time.Correlation analysis showed that REC was positively correlated with MDA content and SOD activity,and negatively correlated with plant growth index.Proline content was positively correlated with SS,SP content and plant growth index,and negatively correlated with REC and MDA content.

关 键 词：红花草莓 盐胁迫 盐害等级 生长发育 生理指标 

分 类 号：S668.4[农业科学—果树学]