摘要
为探明丛枝菌根真菌(arbuscular mycorrhizal fungi,AMF)提高番茄幼苗抗冷性的生理机制,以中杂105为材料,研究接种AMF对低温胁迫下番茄幼苗生长和相关生理指标的影响。结果表明:低温胁迫使番茄幼苗株高、地上部和地下部干鲜质量的增长量和相对叶绿素含量减小,并导致电解质渗透率、可溶性蛋白和MDA含量增加,SOD和POD活性升高,而CAT活性呈先升高后降低的趋势;但接种AMF的幼苗在低温胁迫下较普通番茄幼苗各生长指标的增长量、叶片相对叶绿素和可溶性蛋白的含量均有增加,SOD、POD和CAT的活性亦有增加,同时电解质渗透率和MDA含量显著减少。由此可见,接种AMF能减轻低温胁迫对番茄生长的不利影响,从而增强番茄幼苗对低温胁迫的适应性。
The objective of this study was to gain better insight into the biological mechanisms of enhancing Chilling resistance tomato seedlings by AMF（arbuscular mycorrhizal fungi）.Tomato variety ＇zhong za No.105＇ was used.The growth and physiological indexes were measured under low temperature stress following inoculating AMF.The results indicated that low temperature stress resulted in decreases of height,fresh weight,dry weight and root-shoot ratio and the relative chlorophyll content,but increases of electrolyte permeability,soluble protein and MDA contents and,the activities of SOD and POD.The activity of CAT increased firstly and then reduced.AMF-inoculation improved the increment of plant height,the relative chlorophyll,soluble protein contents,SOD、POD and CAT activities,In contrast,the electrolyte permeability and MDA content decreased.It is therefore concluded that the cold tolerance of tomato seedlings was enhanced by AMF,probably due to alleviating damages to physiological indexes
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2011年第6期64-69,共6页
Journal of China Agricultural University
基金
国家科技支撑计划项目(2011BAD12B03
2011BAD12B01)
农业部园艺作物遗传改良重点开放实验室资助
关键词
丛枝菌根真菌
番茄
低温胁迫
生理特性
arbuscular mycorrhizal fungi
tomato
low temperature stress
physiological property
