生态学杂志2012，Vol.31Issue(12)：3080-3085,6.
壳寡糖对干旱胁迫下油菜叶片生理指标的影响
Effects of oligochitosan on the leaf physiological indices of Brassica napus L.under drought stress
摘要
Abstract
Taking Brassica napus L. , an oil crop broadly cultivated in the world as test object, a greenhouse experiment was conducted to study the effects of oligochitosan on the leaf super oxide dismutase (SOD) and peroxidase ( POD ) activities, proline content, chlorophyll fluorescence parameters, and relative water content under drought stress. After spraying oligochitosan, the leaf SOD and POD activities decreased at early stage but increased obviously at late stage, whereas the leaf proline content increased obviously throughout the process. The maximum quantum yield of photosystem Ⅱ ( Fv/Fm ) , excitation capture efficiency of open centers ( Fv '/Fm') , photo-chemical quenching coefficient (qP) , and effective quantum yield of photosystem 11 photochemis-try (ΦPSⅡ) all increased obviously, while the minimal fluorescence of dark-adapted state (Fo) and non-photochemical quenching coefficient (qN) had an obvious decrease. The leaf relative water content also increased. It was suggested that oligochitosan could improve the related physio-logical indices of B. napus against drought, and further, enhance the drought resistance of the oil crop.关键词
壳寡糖/干旱胁迫/油菜/抗氧化酶活性/叶片相对含水量/叶绿素荧光参数Key words
oligochitosan/drought stress/Brassica napus L./antioxidant enzyme activity/leaf relative water content/chlorophyll fluorescence parameter分类
农业科技引用本文复制引用
李艳,曾秀娥,李洪艳,马清温,赵小明,杜昱光,王青..壳寡糖对干旱胁迫下油菜叶片生理指标的影响[J].生态学杂志,2012,31(12):3080-3085,6.基金项目
辽宁省教育厅项目(2009A427)、国家高技术研究发展计划项目(863计划)(2011AA090704)和公益性行业(农业)科研专项(200903052)资助. （2009A427）
