外源油菜素内酯对棉花耐盐性的影响(英文) |
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引用本文: | 束红梅,;郭书巧,;巩元勇,;帕尔哈提·买买提,;倪万潮. 外源油菜素内酯对棉花耐盐性的影响(英文)[J]. 农业科学与技术, 2014, 0(9): 1433-1437 |
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作者姓名: | 束红梅, 郭书巧, 巩元勇, 帕尔哈提·买买提, 倪万潮 |
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作者单位: | [1]江苏省农业科学院绛济作物研究所、农业部长江下游棉花与油菜重点实验室,江苏南京210014; [2]国家棉花工程技术研究中心,新疆乌鲁木齐830091 |
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基金项目: | 基金项目国家自然科学基金(31201139):国家转基因专项(2011ZX08005-001);江苏省自主创新基金(CX(14)2065)资助. |
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摘 要: | [目的]为明确外源油菜素内酯对棉花耐盐性的影响。[方法]对盐胁迫下棉花设置3种油菜素内酯施用方式,即叶片处理、根系处理、叶片根系同时处理,研究外源油菜素内酯对NaCl胁迫下棉花幼苗的Na+和Cl-吸收、渗透调节及生物量累积的影响。[结果]NaCl胁迫影响棉花生长发育及生理代谢,3种油菜素内酯施用方式均可降低NaCl胁迫下棉花幼苗根、茎、叶的钠、氯离子含量、MDA含量,提高脯氨酸含量,从而使NaCl胁迫下棉花叶片、根系生理功能增强(叶绿素含量升高、根系活力上升),最终使棉花生物量增加。其中,根系施用、叶片根系施用油菜素内酯的2个处理对盐胁迫下棉花根系生物量、根系生理功能的调控效果均好于叶片施用油菜素内酯处理。[结论]3种外源油菜素内酯施用方式均可减轻NaCl胁迫对棉花造成的伤害,但不同的油菜素内酯处理方式对盐胁迫下棉花的调控效果存在差异,根系处理及叶片根系同时处理对减轻棉花盐伤害效果更好。
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关 键 词: | 棉花 NaCl胁迫 油菜素内酯 离子含量 脯氨酸含量 |
Effects of Brassinosteroid on Salinity Tolerance of Cotton |
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Affiliation: | Hongmei SHU, Shuqiao GUO, Yuanyong GONG, PARHAT Mamat, Wanchao NI(1. Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Key laboratory of Cotton and Rapeseed, Ministry of Agriculture, Nanjing 210014, China; 2. China National Cotton R&D Center, Urumqi 830091 China) |
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Abstract: | [Objective] In order to study the effects of brassinosteroid on salinity toler- ance of cotton. [Method] Three application modes (leaf application, root application and leaf/root application) of brassinosteroid for cotton under NaCI stress were de- signed to understand the effects of brassinosteroid on Na+ and CI- accumulation, osmotic adjustment substance (proline) and biomass accumulation of cotton under NaCI stress. [Result] NaCI inhibited the growth of cotton seedlings. Compared with the control group, the biomass of cotton seedlings was decreased, Na+ and CI- contents, MDA content and proline content were increased in cotton under NaCI stress. Under the NaCI stress, three application modes of brassinosteroid significant- ly improved the biomass, chlorophyll content in leaves, root activity and proline content; while Na~ and CI- content, MDA content were decreased. The enhancement of root activity and root physiological functions were more marked in root application and leaf/root application treatments than in leaf/root application treatment. [Conclu- sion] Three application modes of brassinosteroid all could alleviate the NaCI injuries on cotton, but root application and root/leaf application modes of brassinosteroid for cotton under NaCI stress are superior to the leaf application. |
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Keywords: | Cotton NaCI stress Brassinosteroid Na+and CI- content Proline con- tent |
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