摘要
为探究不同品种油茶耐盐性生理机制,以广西壮族自治区武鸣区为试验地点,设置“岑软2号”“岑软3号”“赣兴48”3个品种油茶处理,对不同品种油茶叶片色素含量、MDA含量和SOD活性3个方面进行评估,比较了不同品种油茶耐盐性生理机制。结果表明:不同品种油茶盐碱胁迫下叶片色素含量、MDA含量和SOD活性均存在显著差异,盐碱胁迫会导致油茶叶绿素a和叶绿素b的含量降低,其中,“岑软3号”油茶叶绿素a和叶绿素b含量下降幅度最大;“岑软2号”“岑软3号”油茶会增加类胡萝卜素的合成以抵御胁迫,而“赣兴48”油茶会减少类胡萝卜素的含量;“赣兴48”油茶更易受到氧化胁迫,从而产生更高的MDA含量;“岑软2号”“岑软3号”油茶具有更强的抗氧化能力,能够更有效地对抗盐碱胁迫导致的氧化伤害,其SOD活性上升幅度最大。研究可为油茶种植业的可持续发展和盐碱土壤治理提供科学依据。
This paper aims to explore the physiological mechanisms of salt tolerance in different varieties of Camellia oleifera.This study took Wuming District,Guangxi Zhuang Autonomous Region as the experimental site,and set up three varieties of Camellia oleifera,namely"Cenruan 2","Cenruan 3",and"Ganxing 48",to evaluate the pigment content,MDA content,and SOD activity of different varieties of Camellia oleifera slices.The physiological mechanisms of salt tolerance of different varieties of Camellia oleifera were compared.There are significant differences in leaf pigment content,MDA content,and SOD activity among different varieties of Camellia oleifera Ael.under salt alkali stress.Salt alkali stress can lead to a decrease in the content of Chlorophyll a and Chlorophyll b.Among them,"Cenruan 3"Camellia oleifera has the largest decrease in Chlorophyll a and Chlorophyll b content;"Cenruan 2"and"Cenruan 3"Camellia oil will increase the synthesis of carotenoids to resist stress,while"Ganxing 48"Camellia oil Ael.will reduce the content of carotenoids;“Ganxing 48”Camellia oleifera Ael.is more susceptible to oxidative stress,resulting in higher MDA content;"Cenruan No.2"and"Cenruan No.3"Camellia oleifera Ael.have stronger antioxidant capacity and can more effectively resist oxidative damage caused by salt alkali stress,with the largest increase in SOD activity.This study provides scientific basis for the sustainable development of Camellia oleifera Ael.planting industry and saline alkali soil management.
作者
黎凤金
Li Fengjin(Chaoyan Forest Farm,Wuming District,Nanning City,Nanning 530199,Guangxi,China)
出处
《绿色科技》
2024年第5期144-147,共4页
Journal of Green Science and Technology
关键词
油茶
品种
色素含量
MDA含量
SOD活性
Camellia oleifera Ael.
varieties
pigment content
MDA content
SOD activity
