新疆农业科学2018，Vol.55Issue(4)：627-634,8.DOI:10.6048/j.issn.1001-4330.2018.04.005
玉米幼苗盐胁迫条件下的生理响应机制
Physiological Response Mechanism of Corn Seedlings under Salt Stress
摘要
Abstract
[Objective] The identification of salt tolerance in maize inbred lines and hybrids is of great significance for breeding new varieties of salt-tolerant maize. In order to effectively analyze the response of maize inbred lines and hybrids under salt stress and to analyze the heterosis contribution of inbred lines, it is necessary to study the salt tolerance and heterosis performance of maize in-depth.[Method]The maize in-bred lines B73, GEMS46 and B73×GEMS46F1 were used as testing materials to evaluate their salt tolerance. The trend and final difference of physiological indexes of inbred lines and hybrids under salt-tolerant condi-tions were analyzed and compared, thus reducing the contribution of inbred lines to heterosis under salt stress.[Result]The results showed that the treatment of 150 mmol/L NaCl in 3-leaf and 1-heart corn plants was a reasonable concentration. The fresh weight and dry weight of plant and Na+ and K+ content was criteria indi-cator. After salt treatment, the relative conductivity and H2O2 content of salt-tolerant inbred lines had the same trend as that of hybrids, and the response of salt-tolerant inbred lines and hybrids to salt stress was rap-id. The accumulation of Na+ in salt tolerance inbred and hybrid was stronger than those of the sensitive inbred lines. In the process of breeding new salt-tolerant maize varieties, the response speed of maize inbred lines to salt stress and the content of Na+, K+ ions in the plants were analyzed synthetically. The salt-tolerant cross combinations could be quickly selected by using salt-tolerant inbred lines as parents. [Conclusion]During the breeding of new salt-tolerant maize varieties the response speed to salt stress and the content of Na+, K+ in seeding stage of maize inbred lines were comprehensivery analyzed by using salt-toleant inbred lines as parents which can be quickly screened Salt out of the hybrid combination.关键词
玉米/自交系/耐盐/杂种优势Key words
maize/inbred lines/salt tolerance/heterosis分类
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陈勋基,陈果,常晓春,足木热木·吐尔逊,李建平,郝晓燕,高升旗,黄全生..玉米幼苗盐胁迫条件下的生理响应机制[J].新疆农业科学,2018,55(4):627-634,8.基金项目
新疆维吾尔自治区公益性科研院所基本科研业务经费项目"玉米耐盐性的全基因组关联性分析"(KY2015028) （KY2015028）
国家自然科学基金项目"玉米ZmCIPK42蛋白激酶参与盐胁迫反应的调控机理研究" Basic Scientific R&D Program of Public Welfare Research Institutes of Xinjiang Uygur Autonomous Region of China " Genomic As-sociation Analysis of Salt Tolerance in Maize"(KY2015028)and the National Natural Science Foundation of China " Study on Regulation Mecha-nism of Maize ZmCIPK42 Protein Kinase Involved in Salt Stress Response" （KY2015028）
