钟敏 张文标 黄春辉 陶俊杰 曲雪艳 吴寒 徐小彪

摘要：以猕猴桃属毛花猕猴桃和中华猕猴桃幼苗为材料，采用不同高温处理，探明高温胁迫对猕猴桃幼苗耐热性相关生理指标的影响。结果表明，两种猕猴桃幼苗随高温胁迫处理温度的升高，其叶绿素含量均表现出持续降低的趋势；脯氨酸（Pro）含量随温度升高呈先下降再上升的规律；丙二醛（MDA）含量则持续增加；过氧化物酶（POD）、超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活力均呈现出先小幅度波动再增加的规律。在高温胁迫下，猕猴桃幼苗会随温度的变化产生相应生理适应变化，植物的耐热性是各耐热生理指标综合作用的结果，且在38～40℃高温条件下，毛花猕猴桃幼苗各项耐热指标综合表现优于中华猕猴桃幼苗。

关键词：毛花猕猴桃；中华猕猴桃；耐热性；生理指标

中图分类号：S663.4 文献标识码：A 文章编号：0439-8114（2018）07-0096-04

DOI：10.14088/j.cnki.issn0439-8114.2018.07.022

Effects of High Temperature Stress on Related Heat-resistance Index

in Kiwifruit Seedlings

ZHONG Mina，b，ZHANG Wen-biaob，HUANG Chun-huib，TAO Jun-jieb，QU Xue-yanb，WU Hanb，XU Xiao-biaoa，b

（a.College of Agronomy；b.Kiwifruit Institute，Jiangxi Agricultural University，Nanchang 330045，China）

Abstract： In order to elucidate the influences of high temperature on the physiological and biochemical indexes of the seedlings of kiwifruit，the seedlings of the A. eriantha and the A. chinensis were treated with different high temperature. The physiological and biochemical levels of The chlorophyll content（CC），proline content，malondialdehyde content（MDA），peroxidase activity（POD），superoxide dismutase activity（SOD） and catalase activity（CAT） were measured. The result indicated that the CC content of the two kiwifruit seedlings increased with the high-temperature stress. The proline content decreased with the lower temperature then increased with higher temperature. The MDA increased continuously； The activity of POD，SOD and CAT showed a small fluctuation before increasing. Under high-temperature stress，the kiwifruit seedlings have physiological and biochemical responses to adapt the change of temperature. Under the condition of 38～40 ℃，the resistance of A. eriantha and seedlings was better than the A. chinensis seedlings.

Key words： A. chinensis；A. eriantha；heat resistance；physiological and biochemical indexes

隨着工业的迅速发展，甲烷、CO2等温室气体的排放量增加，使全球气温呈逐步上升态势。相关研究表明，全球平均温度将每10年升高0.3 ℃[1]。近几年，由于温室效应现象的加剧，全球气温不断上升，高温胁迫已影响到许多地区的农业产业[2，3]，研究植物在受到高温胁迫时的生理变化和抗逆性机制具有重大意义。近年来，植物抗热性研究已成为植物生理研究的热点之一，学者在甘蓝[4]、芍药[5]、苹果[6]等植物上的研究表明，在受到热胁迫时，植物体内的生理指标如叶绿素、脯氨酸（Pro）、丙二醛（MDA）含量和抗逆相关酶活性都会发生变化，可以作为耐热性研究的指标。……