外源Ca^(2+)连续喷施时间对辣椒淹水胁迫的缓解效应研究  

Alleviative Effects of Different Spraying Days of Ca^(2+) on Pepper Injury under Waterlogging Stress

作　　者：欧立军[1] 刘周斌[1,2] 杨博智[1,2] 马艳青[1] 张竹青[1] 周书栋[1] 邹学校[1,2] 

机构地区：[1]湖南省蔬菜研究所,长沙410125 [2]中南大学研究生院隆平分院,长沙410125

出　　处：《西北植物学报》2016年第10期2015-2021,共7页Acta Botanica Boreali-Occidentalia Sinica

基　　金：现代农业产业技术体系专项资金资助(CARS-25-A-8)

摘　　要：以‘博辣红牛’辣椒为材料,研究外源Ca^(2+)连续喷施不同天数对淹水胁迫下辣椒幼苗农艺性状和生理指标的影响,探讨Ca^(2+)对辣椒淹水胁迫伤害的缓解作用和适宜的喷施处理天数。结果显示:(1)辣椒幼苗生物量、壮苗指数、叶绿素、根系活力、脯氨酸、可溶性糖以及CAT和SOD活性随施Ca^(2+)天数的增加呈先升高后下降的趋势,MDA含量随施Ca^(2+)天数的增加呈先下降后上升的趋势。(2)施Ca^(2+)1d(T1d)处理对辣椒淹水胁迫伤害无明显缓解作用,连续施Ca^(2+)3d(T3d)和6d(T6d)处理的缓解效果不断增强,至连续施Ca^(2+)9d(T9d)时缓解效果达到最佳,随后连续施Ca^(2+)12d(T12d)和20d(T20d)处理的缓解效果又逐渐减弱,但仍显著优于T1d处理。研究表明,外源Ca^(2+)可以诱导增加淹水胁迫下辣椒幼苗渗透调节物质含量,上调抗氧化酶活性,降低叶绿素的降解,大幅提高根系活力,从而缓解淹水胁迫所造成的各种伤害,增强其忍耐淹水胁迫能力,并以连续施钙9d对淹水胁迫的缓解效果最佳。The mitigation effects of exogenous Ca2＋ on waterlogging-induced damages to agronomic ano physiological indexes of pepper eultivar Bolahongniu were investigated by spraying Ca2＋ on leave＇s surface at different days. The results showed that. （1） the biomass, seedling index, chorophyll contents, root ac- tivity, proline, soluble sugar, SOD and CAT activities of pepper seedlings showed a trend of increasing firstly, then decreasing with spraying days increase. MDA content showed a trend of decreasing firstly, then increasing with spraying days increase. （2） Spraying calcium one day treatment（T1d） showed no sig- nificant mitigation effect under waterlogging damage for pepper. Spraying calcium 3 days treatment（T3d） and spraying calcium 6 clay treatrnent（T6d） showed the increased mitigation effect gradually. Spraying cal- cium 9 days treatment（T9d） achieved the best results, while the mitigation effect gradually weakened with spraying calcium 12 days treatment（T12d） and spraying calcium 20 days treatment（T20d）, but still signifi- cantly better than that of T1d treatment. Overall, the results suggested that Ca2＋ might mitigates water- logging-induced damages to pepper and achieves better alleviation effects by spraying 9 days.

关 键 词：辣椒 淹水胁迫 CA2+ 喷施天数 

分 类 号：Q945.78[生物学—植物学]