摘要
利用防雨旱棚,研究了水分胁迫下3个不同铃重基因型棉花不同部位内围果枝叶片中可溶性蛋白和脯氨酸含量的变化。结果表明:在两处理下,各品种不同部位棉叶中可溶性蛋白含量呈现出了不同的变化趋势,反映了棉花不同部位对水分胁迫适应能力的差异。干旱使各部位3个品种各铃期内围果枝叶可溶性蛋白含量降低,其中,下部果枝叶中大铃品种和小铃品种可溶性蛋白含量降低的幅度大于中铃品种,各品种的中部果枝叶中的可溶性蛋白含量变化比下部平缓,表明此部位果枝叶生理状态在棉铃发育过程中相对稳定。在水分胁迫下,各时期不同品种各部位果枝叶中脯氨酸含量均比对照增加;大铃品种各部位果枝叶在干旱胁迫下脯氨酸含量增加幅度小于中、小铃品种。不同部位果枝叶相比,干旱时脯氨酸含量增加幅度总体表现为:下部果枝叶>中部果枝叶>上部果枝叶。棉花品种存在着对干旱胁迫反应敏感程度不同的脯氨酸代谢调节机制,脯氨酸可以作为棉花抗旱性的参考性生理指标。
The waterproof installations were carried out to deal with the content of soluble protein and free proline of different boll weight genotypes and inner positions in cotton under water stress. The results showed that the content of soluble protein at different positions appeared different trends for these genotypes under the two treatments,it illustrate that different position had different capacities of adaptation to drought stress. Under water stress, the soluble protein content which in each positions were decreased in these genotypes at the whole stage, the big-boll and small-boll varieties in lower branch leaves showed less accumulation of soluble protein content, the change of the content of soluble content in middle branch leaves was smaller than the lower one for each genotype which showed that the physiological characters of the branch leaves was more stable in the boll development. Under drought stress, the free proline content at each branch leaves showed more accumulation than the CK, the big-boll variety had more accumulation of the content of free proline in each poison. The free proline content in the lower branch leaves was the most, and then the middle ones, the upper ones was the least. Different varieties had different regulation mechanism in the condition of drought, so free proline can be considered as a physiological index nearly correlative to drought of cotton.
出处
《华北农学报》
CSCD
北大核心
2008年第5期165-169,共5页
Acta Agriculturae Boreali-Sinica
基金
国家自然科学基金(30370833)
高等学校博士点专项科研基金(20050086003)
河北省自然科学基金资助项(303179)
