干旱、淹水和低温胁迫对莲雾抗氧化系统的影响

【目的】探讨干旱、淹水和低温胁迫对莲雾Syzygiumsamarangense营养生长的控制作用以及对抗氧化系统的影响。【方法】在控温室中对盆栽莲雾进行干旱、淹水和低温胁迫处理，以常温下正常浇水的盆栽莲雾作为对照，观察新梢的抽生情况，测定各处理植株叶片的相对含水量、丙二醛含量和抗氧化水平。【结果】3种胁迫处理均有效控制新梢的抽生；干旱和淹水胁迫下，莲雾叶片相对含水量减少，解除胁迫后相对含水量恢复到对照水平；与对照相比，3种胁迫处理均增加了叶片丙二醛的含量，提高了叶片超氧化物歧化酶和抗坏血酸过氧化物酶的活性，增加了抗坏血酸和还原型谷胱甘肽的含量。【结论】干旱、淹水和低温胁迫处理有效控制了营养生长...

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Published in华南农业大学学报 Vol. 39; no. 1; pp. 51 - 56
Main Author 简营;全振炫;胡福初;卢曼;王露;周碧燕
Format Journal Article
LanguageChinese
Published 2018
Subjects
莲雾;干旱;淹水;低温;胁迫;抗氧化
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ISSN1001-411X
DOI10.7671/j.issn.1001-411X.2018.01.009

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Summary:【目的】探讨干旱、淹水和低温胁迫对莲雾Syzygiumsamarangense营养生长的控制作用以及对抗氧化系统的影响。【方法】在控温室中对盆栽莲雾进行干旱、淹水和低温胁迫处理，以常温下正常浇水的盆栽莲雾作为对照，观察新梢的抽生情况，测定各处理植株叶片的相对含水量、丙二醛含量和抗氧化水平。【结果】3种胁迫处理均有效控制新梢的抽生；干旱和淹水胁迫下，莲雾叶片相对含水量减少，解除胁迫后相对含水量恢复到对照水平；与对照相比，3种胁迫处理均增加了叶片丙二醛的含量，提高了叶片超氧化物歧化酶和抗坏血酸过氧化物酶的活性，增加了抗坏血酸和还原型谷胱甘肽的含量。【结论】干旱、淹水和低温胁迫处理有效控制了营养生长，提高了莲雾抗氧化水平。
Bibliography:Ojective】To investigate the effects of drought,waterlogging and chilling stresses on vegetative growth and antioxidant system of wax apple(Syzygium samarangense).【Method】Potted wax apple trees were subjected to drought,waterlogging and chilling stresses in a temperature-controlled room.Trees which were normally watered and grown at room temperature were used as controls.Shoot growth was observed.The relative water content,malondiadehyde(MDA)content,and antioxidant levels of leaves were measured.【Result】Sprouting were prevented by all three stress treatments.Relative water content of the drought-and waterlogging-treated leaves decreased,but increased to control levels after relieving the stresses.Three stress treatments increased leaf MDA contents,superoxide dismutase(SOD)and ascorbic acid peroxidase(APX)activities,as well as ascorbic acid(AsA)and reduced glutathione(GSH)contents compared with control.【Conclusion】Drought,waterlogging and chilling stresses could control vegetative growth and increase the antiox
ISSN:1001-411X
DOI:10.7671/j.issn.1001-411X.2018.01.009