烯效唑(S3307)对大麦整株水平Na^+、K^+选择性和游离脯氨酸分配的影响  

Effects of Uniconazol(S3307) Spray on Selectivity for K^+ over Na^+ and Distribution of Free Proline in Hordeum vulgare

作　　者：张金林[1] 王锁民[1] 陈托兄[1] 徐震[1] 严学兵[1] 陆妮[1] 

机构地区：[1]兰州大学草地农业科技学院农业部草地农业生态系统学重点开放实验室,甘肃兰州730020

出　　处：《麦类作物学报》2008年第4期655-660,共6页Journal of Triticeae Crops

基　　金：国家自然科学基金项目(30671488;30770347;30700562);国家高技术研究发展计划(863计划)项目(2006AA10Z126);教育部新世纪优秀人才支持计划项目(NCET-05-0882);甘肃省农业生物技术研究与应用开发项目(GNSW-2004-07)

摘　　要：为给植物生长调节剂烯效唑(S3307)的推广应用提供理论基础,以大麦为试验材料,通过喷施S3307和盆栽的方法,探讨了S3307对植物抗盐性及植株水平上Na+、K+选择性和游离脯氨酸分配的调控效应。结果表明,喷施S3307后大麦根系的Na+、K+选择性吸收能力和运输能力并未提高,由茎向叶鞘、由叶鞘向叶片、由茎向穗的Na+、K+选择性运输能力也均未得到提高;然而,喷施S3307却大幅度地提高了大麦地上部分,特别是重要光合器官中的游离脯氨酸含量,从而增强了其对盐胁迫的抵御能力。A plant growth regulator-uniconazole（S3307） was sprayed upon the shoots of potted Hordeum vulgare to alter the original balance of endogenous hormone in the whole plant, and to examine the regulatory effect brought about on salt tolerance of plant and selectivity for K^＋ over Na^＋ and distribution of free proline at whole plant level. The results indicated that, after spraying S3307, the selectivity for K^＋ over Na^＋ and distribution of proline at whole plant level were regulated, thus the spray may help H. vulgare to adapt to salt environments. The major photosynthetic organs of H.vulgare adapt to NaCl stress by uptaking Na^＋ , decreasing the content of K^＋ and accumulating free proline by a wide margin.

关 键 词：大麦 烯效唑(S3307) NA^+ K^+ 游离脯氨酸 

分 类 号：S512.3[农业科学—作物学] S143.8