耐盐丰产小麦品种德抗961的耐盐生理机制  

Salt Tolerance Mechanism of the New Wheat Cultivar DK961 with Salt Tolerance and High Yield

作　　者：梁超[1] 张学英[1] 杨秀凤 张秀田 王玮[1] 

机构地区：[1]山东农业大学生命科学学院,山东泰安271018 [2]德州市农业科学研究院,山东德州253015

出　　处：《山东农业科学》2007年第1期46-49,共4页Shandong Agricultural Sciences

基　　金：山东省科技攻关项目(2005GG3209122);山东省自然科学基金(Y2003D03)项目

摘　　要：以山农215953(SN215953)为对照,室内200 mmol/L NaCl模拟盐胁迫条件,从幼苗生长和光合机构两个方面研究了德抗961的耐盐生理特性。结果表明:盐胁迫条件下德抗961(DK961)地上部生物量(鲜重、干重)、相对含水量均高于SN215953,而其株高显著大于SN215953,这有助于对细胞内的盐分进行稀释,即“稀盐”性,保护细胞质不受离子毒害。同时,德抗961叶片的希尔反应活力和Ca2+-ATPase活性受抑制的程度较小,光合能力相对较高。分析认为,以上两个方面可能是德抗961抗盐性强的重要原因。DK961 is a salt tolerance wheat cultivar which had been approbated by Shandong authority organization, and its salt tolerance had been proved favorable by field production. But the salt tolerance mechanism of it is still not clear. In this study, the salt tolerance mechanisms of DK961 was studied with SN215953 as control under salt stress condition （200 mmol/L NaCl） simulated artificially in the laboratory. The experiments was carried out from two aspects： the seedlings growth and the photosynthetic organizations. The results indicated that, under salt stress, the salt-tolerance cultivar DK961 could maintain better growing state than SN215953, such as higher biomass （fresh weight and dry weight） and relative water content, and its seedlings were significantly higher than SN215953. All those could dilute the concentration of salt absorbed by root from the salinity environment in order to protect the cytoplasm. At the same time, salt st, ress notably decreased Hill reaction activity and Ca^2＋- ATPase activity of the leaves in two wheat cultivars, but the restriction to DK961 was much less than SN215953. This superiority ensured DK961 to maintain the stability of photosynthesis. So the two aspects above may be important for DK961 to endure high salt concentration.

关 键 词：小麦 德抗961 耐盐 生理机制 

分 类 号：S512.110.1[农业科学—作物学]