水杨酸处理对干旱条件下马铃薯单株质量及叶绿素含量的影响  

Effects of Exogenous Salicylic Acid on Weight and Chlorophyll Content of Potato Under Drought Stress

作　　者：韩海霞[1,2] 姚岭柏 李晓田[1] HAN Hai-xia;YAO Ling-bai;LI Xiao-tian(Department of Biology,Jining Normal University,Wulanchabu,Inner Mongolia 012000;Institute of Biotechnology Research and Application,Wulanchabu,Inner Mongolia 012000)

机构地区：[1]集宁师范学院生物系,内蒙古乌兰察布012000 [2]生物技术研发与应用研究所,内蒙古乌兰察布012000

出　　处：《黑龙江农业科学》2017年第11期26-29,共4页Heilongjiang Agricultural Sciences

基　　金：内蒙古自治区高等学校资助项目(NJZC16319;NJZC16321);集宁师范学院教学改革与研究资助项目(JGKT2015002;JGKT2015036)

摘　　要：为探究马铃薯抗旱方法,以后旗红马铃薯为试材,采用温室盆栽培养方法,研究了在干旱胁迫情况下不同浓度水杨酸对马铃薯单株鲜重、单株干重及叶绿素含量的影响。结果表明:在喷施水杨酸后0、10d时,各个浓度处理下的干旱马铃薯单株鲜重呈逐渐升高的变化趋势,而在喷施水杨酸后的第20天,0.10~0.20mmol·L^(-1)水杨酸处理下,单株鲜重呈下降趋势;单株干重随着水杨酸浓度的增加呈现波动变化;喷施0d(喷施后2h)时马铃薯叶片中叶绿素含量与对照差异不显著;喷施10d时差异显著,不同水杨酸处理叶绿素含量较对照有显著提高;到了20d时,差异减小,处理与对照间差异不显著。说明短期内水杨酸有利于干旱条件下马铃薯中叶绿素的保持,长期干旱时叶绿素含量回落。综上所述,水杨酸处理对干旱条件下马铃薯植株生长及叶绿素的保持具有一定的促进作用,但随着干旱时间的延长这种作用逐渐减小。In order to explore the methods of potato drought resistance,take“Houqihong”potato variety as the test material by potting,the fresh weight per plant,dry weight per plant and chlorophyll content of potato un-der drought stress with different concentrations of salicylic acid were studied.The results showed that after spraying salicylic acid at0d and10d,fresh weight per plant of potato under different concentrations was grad-ually increased.After spraying salicylic acid at20d,fresh weight per plant was downtrend;and dry weight per plant was presented in the fluctuation changes with the increase of salicylic acid concentrations under0.10~0.20mmol·L1.After spraying at0d(2h after spraying),had no significant difference in chlorophyll content of potato between treatment and the control.However,there was the significant difference after spraying at10d.Relative to the control,the treatments with different salicylic acid was obviously improved.At20d,the differ-ence was reduced,had no statistical difference between the treatment and control group.So,short period with salicylic acid was beneficial to remain chlorophyll content in potato under drought stress,while it will decrease the chlorophyll content in long period.In summary,salicylic acid could promote potato plant growth and remain of chlorophyll content,but the effect reduced with the extension of drought time.

关 键 词：马铃薯 水杨酸 单株鲜重 单株干重 叶绿素 

分 类 号：S532[农业科学—作物学]