摘要
在150 mmol/L NaCl胁迫条件下,以达塞莱克特草莓为试材,利用基质盆栽方法研究了外源腐胺和钙对草莓生长、叶片含水量、脯氨酸含量及Ca^(2+)、Na^+和Cl^-吸收的影响。结果表明,在营养液中添加14 mmol/L硝酸钙和叶面喷施1×10^(-5)mol/L腐胺均可提高盐胁迫草莓植株的地上部和地下部干鲜重,提高叶片含水量、脯氨酸含量,抑制Na^+和Cl^-的吸收及运输,提高根系和叶片的K^+/Na^+值和Ca^(2+)/Na^+值,硝酸钙和腐胺同时处理的效果优于单独处理。缺钙条件下,喷施外源腐胺的K^+/Na^+值和Ca^(2+)/Na^+值显著或极显著低于腐胺加钙处理,Cl^-含量显著高于腐胺加钙处理。外源腐胺对Na^+和Cl^-吸收的调控作用受到Ca^(2+)的调节。
The effects of exogenous putrescine and calcium on plant biomass, leaf water content, proline content and ion uptake including Ca^2＋ , Na^＋ and Cl^- in strawberry （Fragaria ananassa Duch. cv. Darselect） under 150 mmol/L NaCl stress were studied. The plants for experiment were cultivated with medium in spot. NaCl and calcium nitric acid were dissolved in nutrient solution. The results showed that fresh weight and dry weight of shoot and root were increased by 14 mmol/L Ca（NO3）2 added in culture solution and 1 × 10^-5 mol/L putrescine sprayed on leaf. Although leaf water con- tent, proline content, K^＋/Na^＋ and Ca^2＋/Na^＋ were improved, assimilation and transport of natrium and chlorine were inhibited. Although K^＋ to Na^＋ ratio and Ca^2 ＋ to Na^＋ ratio were promoted by putrescine and calcium, both ratios were lower in plants treated by putrescine but without calcium. It indicated that the role of putrescine was promoted by calcium, but weakened overall or partly by calcium deficiency. It suggested that the role of exogenous putrescine controlling salinity-tolerance was related to Ca^2 ＋ .
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2008年第3期540-545,共6页
Journal of Plant Nutrition and Fertilizers
基金
教育部科学技术研究重点项目(207010)
河北省自然科学基金(2007000442)
河北农业大学博士基金资助。
关键词
草莓
盐胁迫
钙
腐胺
离子含量
strawberry
salt stress
calcium
putrescine
ion content
