干旱区生态环境知识资源中心(Arid): 持续干旱胁迫对青薯9号幼苗生长及生理特性的影响

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	持续干旱胁迫对青薯9号幼苗生长及生理特性的影响
其他题名	Effects of Persistence Drought on Growth and Physiological Characteristics of Potato Seedlings
	邓仁菊; 卢扬; 曾宪浩; 何天久; 潘建梅; 雷尊国
来源期刊	西南农业学报
ISSN	1001-4829
出版年	2017
卷号	30 期号:2 页码:291-295
中文摘要	为青薯9号马铃薯新品种在贵州干旱石漠化地区的推广应用提供参考, 采用盆栽模拟干旱试验研究持续干旱胁迫对青薯9号幼苗生长及生理特性的影响。结果表明:在不同干旱胁迫条件下, 轻度干旱胁迫对青薯9号幼苗株高和地上部生物量的影响不明显, 但随着干旱胁迫程度增加和持续时间的延长, 幼苗生长受抑制程度明显;相对电解质渗出率(REC)和丙二醛(MDA)含量均随干旱胁迫程度增加和持续时间的延长呈逐渐增加趋势, 在持续干旱第20天, 轻度干旱胁迫、中度干旱胁迫和重度干旱胁迫青薯9号叶片的REC和MDA含量分别比对照增加34.5 %和39.7 %、124.5 %和116.3 %、177.0 %和152.0 %。在整个干旱胁迫过程中, 青薯9号叶片的可溶性糖、可溶性蛋白和脯氨酸(Pro)含量均显著高于对照, 其中, Pro含量随干旱持续时间的延长呈先升高后降低趋势, 并在轻度干旱胁迫第15天达最大值, 中度和重度干旱胁迫第10天达最大值;超氧化物歧化酶(SOD)和过氧化物酶(POD)在轻度干旱胁迫下呈逐渐增加趋势, 而在中度和重度干旱胁迫下随持续时间的延长呈先升高后降低趋势, 即在长期轻度、短期中度和重度干旱胁迫下, 青薯9号幼苗可以通过提高细胞抗氧化酶活性来清除体内多余活性氧, 维持膜稳定性, 但随胁迫强度的增加和胁迫时间的延长, 抗氧化酶活性明显降低, 膜脂过氧化酶增强, 植株受到严重伤害。
英文摘要	The effects of persistence drought on growth and physiological characteristics of Qingshu 9 seedlings were studied by a pot simulated drought method to provide a reference for popularization and application of Qingshu 9, a new potato variety, in drought and stony desertification areas, Guizhou.Results: Mild drought stress has no obvious effect on plant height and overground biomass of potato seedlings but seedling growth is obviously inhibited with increase of drought stress degree and prolongation of drought duration.Leaf REC and MDA content presents a gradual rising trend with increase of drought stress degree and prolongation of drought duration.Leaf REC and MDA content under mild, moderate and heavy drought stress for 20d drought duration is 34.5 % and 39.7 %, 124.5 % and 116.3 %, 177.0 % and 152.0 % respectively.Leaf soluble sugar, soluble protein and proline content is significantly higher than CK during the process of drought stress.The proline content presents a first rising and then declining trend with prolongation of drought duration.Leaf proline content reaches the maximum under mild drought stress after 15d drought duration and under moderate and heavy drought stress after lOd drought duration.Leaf SOD and POD content presents a gradual rising trend under mild drought stress but a first rising and then declining trend with prolongation of drought duration under moderate and heavy drought stress.Qianshu 9 seedlings can remove internal surplus active oxygen by raising cell autioxidant enzyme activity to maintain membrane stability but seedlings suffer severe damage with increase of drought stress degree and prolongation of drought duration because its decrease of autioxidant enzyme activity and increase of membrane lipid peroxidase.
中文关键词	马铃薯 ; 干旱胁迫 ; 幼苗生长 ; 生理特性 ; 青薯9号
英文关键词	Potato Drought stress Seedling growth Physiological characteristics Qingshu 9
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5934063
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236836
作者单位	贵州省生物技术研究所, 贵阳, 贵州 550006, 中国
推荐引用方式 GB/T 7714	邓仁菊,卢扬,曾宪浩,等. 持续干旱胁迫对青薯9号幼苗生长及生理特性的影响[J],2017,30(2):291-295.
APA	邓仁菊,卢扬,曾宪浩,何天久,潘建梅,&雷尊国.(2017).持续干旱胁迫对青薯9号幼苗生长及生理特性的影响.西南农业学报,30(2),291-295.
MLA	邓仁菊,et al."持续干旱胁迫对青薯9号幼苗生长及生理特性的影响".西南农业学报 30.2(2017):291-295.