云南农业大学学报（自然科学）2017，Vol.32Issue(6)：992-998,7.DOI:10.16211/j.issn.1004-390X(n).2017.06.005
干旱胁迫对冬马铃薯苗期生理指标及光合特性的影响
Effects of Drought Stress on Physiological Index and Photosynthetic Traits at Seedling Stage of Winter Potato
摘要
Abstract
[Purpose] Four potato varieties (Hui-2,Hezuo88,Lishu6 and Xuanshu2) were cultivated in pots in winter,and the effects on physiological indexes and photosynthetic parameters were studied under drought stress to provide a theoretical base for drought resistant cultivation and quality drought-tolerant winter potato varieties selection.[Method] Four main potato cultivars (Hui-2,Hezuo88,Lishu6 and Xuanshu2) used in Yunnan,were selected for drought stress.When the soil moisture content was 20％ to 40％ of the maximum amount of water in the field,the proline content,soluble sugar content,soluble protein content,SOD activity,POD activity,CAT activity,MDA content,soil water content,chlorophyll a,chlorophyll b,chlorophyll a/b,total chlorophyll,transpiration rate,net photosynthetic rate,stomatal conductance and intercellular CO2 concentration were detected.[Results] The proline content,soluble sugar content,soluble protein content,SOD activity,POD activity,CAT activity and MDA content increased significantly under drought stress,however,the soil water content,chlorophyll a,chlorophyll b,chlorophyll a/b,total chlorophyll,transpiration rate,net photosynthetic rate,stomatal conductance,intercellular CO2 concentration decreased.Chlorophyll a was more sensitive than chlorophyll b.Drought resistance ranks of four potato cultivars were as follows:Hui-2 ＞ Xuanshu 2 ＞ Hezuo88 ＞ Lishu 6.[Conclusion] Under severe drought stress,the changes of physiological properties,fluorescence parameters are closely related with drought resistance.关键词
冬马铃薯/干旱胁迫/苗期/生理指标/光合特性Key words
winter potato/drought stress/seedling stage/physiological indexes/photosynthetic traits分类
农业科技引用本文复制引用
尹智宇,肖关丽..干旱胁迫对冬马铃薯苗期生理指标及光合特性的影响[J].云南农业大学学报（自然科学）,2017,32(6):992-998,7.基金项目
云南省教育厅重大专项(ZD2015006). （ZD2015006）
