高温胁迫对马铃薯幼苗生长和部分生理指标的影响  

Effects of High Temperature Stress on Growth and Some Physiological Indices of Potato Seedlings

作　　者：戴鸣凯 张志忠[1,2] 刘爽[1,2] 樊佳茹[1,2] 王革伏 Dai Mingkai;Zhang Zhizhong;Liu Shuang;Fan Jiaru;Gefu Wang-Pruski(College of Horticulture,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;Joint FAFU-Dalhousie Lab,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;Department of Plant,Food,and Environmental Sciences,Faculty of Agriculture,Dalhousie University,NS B2N5E3,Canada)

机构地区：[1]福建农林大学园艺学院,福州350002 [2]福建农林大学-戴尔豪西大学联合实验室,福州350002 [3]戴尔豪西大学农学院,植物食品和环境科学系,加拿大新斯科舍B2N5E3

出　　处：《农学学报》2018年第9期9-14,共6页Journal of Agriculture

基　　金：福建省闽江学者科研基金(116-114120019);福建农林大学园艺学院闽江学者科研启动基金

摘　　要：高温逆境会严重抑制马铃薯生长发育,导致产量下降,造成严重经济损失,笔者通过分析高温胁迫对马铃薯幼苗生长情况和部分生理指标的影响,为马铃薯抗热性机制研究提供参考。试验以‘闽薯1号’为材料,高温胁迫处理马铃薯植株,观测胁迫条件下植株生长情况变化,超氧阴离子(O^(2-))、丙二醛(MDA)、过氧化氢(H_2O_2)和脯氨酸(Pro)含量变化,及超氧化物歧化酶(SOD)、过氧化酶(POD)和过氧化氢酶(CAT)等保护酶活性变化。结果表明:高温对植株的株型,叶片大小,长势都造成了一定的影响;生理指标SOD呈现先上升后下降的趋势,POD与CAT则先下降后上升;MDA、O^(2-)、H_2O_2、Pro含量都出现持续上升的趋势。幼苗体内活性氧的积累,膜质氧化加剧可能是导致马铃薯高温伤害的原因之一。High temperature stress could seriously inhibit the growth and development of potatoes, leading to the decline of production and cause serious economic losses. To study heat resistance mechanism of potatoes,we analyzed the effect of high temperatures on potato seedlings＇ growth conditions and some physiological indices. We tested the contents of superoxide anion（O^2-）, malondialdehyde（MDA）, hydrogen peroxide（H2O2）and proline（Pro） contents and the enzymatic activities of superoxide dismutase（SOD）, peroxidase（POD）, and catalase（CAT） of potato seedlings of cultivar＇Minshu No.1＇under the high temperature treatments. The phenotypic changes before and after the high temperature treatment was also recorded. The results indicated that the high temperatures had certain effects on plant shape, leaf size and growth conditions. The contents of SOD increased first and then decreased; values of POD and CAT decreased first and then increased.Meanwhile, the contents of O^2-, MDA, H2O2 and Pro all increased during the examination period. The accumulation of reactive oxygen species and increased membrane oxidation in potato seedlings are the reasons that may cause the damages to potatoes under high temperatures.

关 键 词：马铃薯 高温胁迫 活性氧代谢 保护酶 

分 类 号：S532[农业科学—作物学]