高温胁迫对辣椒幼苗生长及生理性状的影响  

Effect of High Temperature Stress on Morphology and Physiological Characteristics of Pepper Seedlings

作　　者：贾志银[1] 巩振辉[1] 许红娟[1] 逯明辉[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《北方园艺》2010年第12期5-8,共4页Northern Horticulture

基　　金："十一五"国家科技支撑计划资助项目(2006BAD01A7;2008BADB1B04);陕西省"13115"科技创新工程重大科技专项资助项目(2007ZDKG-05)

摘　　要：以耐热品种B34和热敏品种B6幼苗为试材,对高温胁迫下辣椒幼苗形态性状及生理特性的变化进行比较分析。结果表明:辣椒不同耐热品种在高温胁迫下,幼苗的茎粗、鲜重和干重无明显差异,株高和根长差异显著,在处理第7天时,耐热品种B34的株高和根长分别比对照降低了6.9%和10.86%。而热敏品种B6的株高和根长分别比对照降低了10.78%和17.8%。不同耐热品种幼苗热害指数随高温胁迫时间的延长而逐渐升高,叶片含水量无明显差异,叶绿素含量逐渐降低,根系活力、POD活性先升高后降低,其中热敏品种比耐热品种表现更为明显。Themo-tolerant cv. B34 and thermo-sensitive cv.B6 were used to study the morphology and physiological effects of high temperature on pepperseedlings. The results showed that nosignificant difference in stem diameter, fresh weight,dry weight of the seedlings was observed between the two cultivars under high temperature, while plant height and root vitality was significantly differentbetween the two cultivars. In treat seventh day, plant height and root vitality of Themo-tolerant cv B34 reduced 6.9% and 10.86% compared to control cv. B6 reduced 10.78% and 17.8 %. Injury index increased to different degrees during high temperature treatment, leaf water content was not significant difference, chlorophyll content were significantly reduced. The root vitality and POD vitality increased at short time and then decreased in the longer stress time. These phenomena were more evident in thermo-sensitive cultivar than in themo-tolerant cultivar.

关 键 词：辣椒 热胁迫 形态指标 生理生化 

分 类 号：S641.3[农业科学—蔬菜学]