摘要
为了给氯化镧在玉米水分管理中的应用提供依据,采用10%PEG模拟干旱胁迫的方法,研究了外源氯化镧对干旱胁迫下玉米幼苗抗氧化特性的影响。结果表明,干旱胁迫显著提高了根叶细胞质膜透性、MDA及叶片SOD和CAT活性、根叶POD和APX活性,显著降低了叶绿素、根系活力和生物量;与单独干旱处理相比,外源氯化镧处理使干旱下幼苗根系SOD、POD、APX活性和根系活力分别增加了43.9%、20.2%、50%和30%,使根系细胞质膜透性和MDA分别降低了20%和21.7%,外源氯化镧使叶片SOD、POD、APX活性和叶绿素分别增加了25.3%、27.2%、16.9%和17%,使叶片细胞质膜透性和MDA分别降低了17.5%和21.3%;氯化镧使玉米幼苗生物量增加了20.2%。外源氯化镧处理可以明显增强玉米幼苗的抗氧化能力,从而缓解干旱对玉米植株所造成的伤害。
To provide evidence for the application of lanthanum chloride in the water management of maize, the effects of exogenous lanthanum chloride on the antioxidant properties of Xindan29 seedling were stud- ied under drought stress induced by 10%PEG. The results showed that the membrane permeability, MDA content, the activities of SOD and CAT in leaf and the activities of POD and APX in root and leaf were sig- nificantly increased by drought stress. However, the chlorophyll content, root activity and biomass were significantly decreased by drought stress. Compared with drought stress alone, with the apphcation of ex- ogenous lanthanum chloride the activities of SOD, POD and APX in root and root activity of maize seedling were increased by 43.9%, 20.2%, 50% and 30%, respectively; The membrane permeability and MDA content in root were reduced by 20% and 21.7%, respectively; For the leaves, the activities of SOD, POD and APX and the chlorophyll content were increased by 25.3%, 27.2%, 16.9% and 17%, respectively; The membrane permeability and MDA content in leaf were reduced by exogenous lanthanum chloride by 17.5% and 21.3%, respectively. The biomass of maize seedlings was significantly increased by lanthanum chloride under drought stress. Exogenous lanthanum chloride protects maize seedlings against damage in- duced by drought stress by improving the antioxidant properties.
出处
《灌溉排水学报》
CSCD
北大核心
2015年第7期97-100,共4页
Journal of Irrigation and Drainage
基金
河南省教育厅科学技术研究重点项目(13A180302)
关键词
玉米
幼苗
氯化镧
干旱胁迫
抗氧化特性
maize
seedling
lanthanum chloride
drought stress
antioxidant properties
