非生物胁迫对棉花次生代谢及棉蚜种群消长的影响

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1、棉花学报CottonScience2016,28(4):324―330非生物胁迫对棉花次生代谢及棉蚜种群消长的影响111121*马惠袁王琦袁赵鸣袁王红艳袁纪祥龙袁董合忠渊1.山东棉花研究中心袁山东济南250100曰2.山东省绿色食品发展中心袁山东济南250013冤摘要院盐碱尧干旱等非生物胁迫影响棉花的次生代谢袁而次生代谢可能影响棉株上的害虫发生遥为明确非生物胁迫与次生代谢及棉蚜种群消长三者间的关系袁以不同浓度氯化钠渊NaCl冤和聚乙醇渊PEG冤溶液分别处理棉苗袁测定了棉叶组织内棉酚和可溶性糖含量的变化袁并观察了棉蚜在被处理棉苗上的生长发育及繁殖情况遥结果发现袁100和200

2、mmol窑L－1NaCl处理棉苗的棉酚含量分别比不含NaCl的对照提高20%和53.5%袁可溶性糖含量分别提高15.7%和46%遥盐胁迫显著延长棉蚜的发育历期并降低繁殖率袁100和200mmol窑L－1NaCl处理的棉蚜若蚜期分别比对照延长6.4%和9.9%袁单雌产蚜量分别减少22.6%和52.3%遥干旱胁迫也影响棉花叶片棉酚和可溶性糖含量袁质量分数2.5%和5%的PEG处理棉株的棉酚含量分别比对照提高39.7%和61.5%袁可溶性糖含量分别提高14.2%和47.1%袁生长在PEG处理棉株上的棉蚜的若蚜期分别延长7.4%和16.5%袁单雌产蚜量分别减少26.8%和55.8%

3、遥叶片内棉酚和可溶性糖含量均与棉蚜若蚜期呈显著正相关袁与棉蚜的产蚜量呈显著负相关遥由此推断袁盐碱尧干旱等非生物胁迫增强了棉苗的次生代谢袁导致棉酚和可溶性糖等次生代谢产物大量积累袁抑制了棉蚜种群的消长遥关键词院非生物胁迫曰次生代谢曰棉蚜曰发育历期曰繁殖率中图分类号院S562.01文献标志码院A文章编号院1002-7807渊2016冤04-0324-0710.11963/issn.1002-7807.201604002111121*MaHui,WangQi,ZhaoMing,WangHongyan,JiXianglong,DongHezhong(1.250100,;2.2500

4、13,)Abioticstressessuchassalinityanddroughtaffectthesecondarymetabolismincottonplants,whichmayfurtherinflu-encetheoccurrenceofpestsonthestressedplants.Todeterminetherelationshipsofabioticstresswithsecondarymetabolismandcottonaphidpopulationdynamics,weconductedanexperimenttodeterminethegoss

5、ypolandsolublesugarcontentsincot-tonleavesstressedwithdifferentconcentrationsofNaClandPEG(polyethyleneglycol),respectively.Thedevelopmentandmultiplicationofcottonaphidsoncottonseedlingswerealsostudied.Theresultsindicatedthatthegossypolcontentsincottonleavesincreasedby20%and53.5%with100and2

6、00mmol窑L－1ofaddedNaCl,respectively.Thesolublesugarcontentsin-creasedby15.7%and46%.Thedevelopmentalperiodofcottonaphidsinsalt-stressedplantswassignificantlyextended,whilethereproductiverateofcottonaphidswassignificantlyreduced.Thedurationsofthenymphstageunderthe100and200mmol窑L－1NaCltreatmen

7、tsincreasedby6.4%and9.9%,relativetothecontrol,respectively;Thefecundityofthesinglefemalere-ducedby22.6%and52.3%,respectively;Accumulationofthegossypolandsolublesugarincottonleaveswasalsoenhancedbydroughtstress;Thegossypolcontentsincreasedby39.7%and61.5%,andthe