低温弱光下辣椒3种渗透调节物质含量变化及其与品种耐性的关系  

Changes of Three Osmotic Regulatory Metabolites in Leaves of Pepper under Low Temperature and Poor Light Stress and Relations between Its and Varietal Tolerance

作　　者：颉建明[1] 郁继华[1] 颉敏华[2] 冯致[1] 

机构地区：[1]甘肃农业大学农学院,兰州730070 [2]甘肃省农业科学院农产品贮藏加工研究所,兰州730070

出　　处：《西北植物学报》2009年第1期105-110,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家科技支撑计划(2007BAD52B01);甘肃省科技攻关项目(2GS052-A41-007-05);甘肃省自然科学基金(3ZS061-A25-075)

摘　　要：以12个耐低温弱光的辣椒品种为试验材料,模拟日光温室低温弱光逆境,研究了辣椒叶片中脯氨酸(Pro)、可溶性糖、可溶性蛋白含量的变化及其与耐低温弱光性之间的相关性。结果表明,15℃/5℃(昼/夜)、100μmol·m-2·s-1光照处理使辣椒叶片的Pro含量、可溶性糖含量升高,可溶性蛋白含量于处理前期升高,后期降低。低温弱光处理10 d的可溶性蛋白含量和处理20 d的可溶性糖含量与辣椒耐低温弱光性呈显著正相关;10个品种的Pro含量与品种的耐低温弱光性呈极显著正相关,Pro的累积表现为保护作用;耐低温弱光性较强的品种‘湘研1号’和较弱的品种‘湘研16号’中Pro含量与耐性呈负相关,Pro的累积表现为伤害性反应。The changes of proline （Pro）,soluble sugar and soluble protein in leaves of 12 pepper varieties whom were known tolerance to low temperature and poor light under low temperature （15℃/5℃, day/ night,simulating unfavorable conditions of sunshine greenhouse in deep winter） and poor light （100 μmol · m-2 · S-1 ,12 h photoperiod） stress were studied. The relations between these changes and the varietal tolerance were analyzed. The results showed that the Pro contents and the soluble sugar contents increased in leaves of 12 pepper varieties treated under low temperature and poor light stress for 20 days, compared to the control. The soluble protein contents increased and arrived at highest value on the 5th day, then de- creased, and were lower than that in untreated ones on the 20th day. There were significant positive correla- tions between the varietal tolerance and the soluble protein contents on the 10th day or the soluble sugar contents on the 20th day in leaves of 12 pepper varieties. There were significant positive correlations be- tween the varietal tolerance and the Pro contents in leaves of 10 pepper varieties,suggesting that the accu- mulations of Pro in leaves of pepper treated under low temperature and poor light stress played an imporrant role in protecting the pepper leaves from chilling and poor light damages. But there were signiticant negative correlations between the varietal tolerance and the Pro contents in leaves of the other two pepper varieties,indicating that the accumulations of Pro in leaves of these two pepper varieties treated under low temperature and poor light stress were the results of chilling and poor light damages.

关 键 词：辣椒 低温弱光 脯氨酸 可溶性糖 可溶性蛋白 耐低温弱光性 

分 类 号：Q945.79[生物学—植物学]