低温弱光胁迫下二氯化钴对辣椒幼苗生理指标的影响  

Influence of CoCl_2 on physiological indicators of pepper seedlings under low temperature and poor light stress

作　　者：申磊[1] 郁继华[1] 颉建明[1] 火顺利 王小龙[1] 祁光斌 周箬涵 

机构地区：[1]甘肃农业大学园艺学院,甘肃兰州730070

出　　处：《甘肃农业大学学报》2015年第6期37-41,共5页Journal of Gansu Agricultural University

基　　金：国家自然科学基金项目(31260493);现代农业产业技术体系专项资金"国家大宗蔬菜产业技术体系"(CARS-25-C-07);甘肃省农业科技创新项目(GNCX-2013-37)

摘　　要：以‘陇椒5号’辣椒(Capsicum annuum)幼苗为试材,研究了不同浓度二氯化钴(CoCl_2)在低温弱光胁迫下对辣椒幼苗的生理指标的影响.结果表明:在15℃/5℃(昼/夜)低温,100μmol/(m^2·s)弱光胁迫下,辣椒幼苗根系活力降低,叶片叶绿素含量下降,丙二醛(MDA)和游离脯氨酸(Pro)含量升高.一定浓度的CoCl_2水溶液可以缓解辣椒幼苗根系活力与叶绿素含量的降低,缓解MDA与Pro含量的升高.浓度为0.06mmol/L的CoCl_2水溶液可以使辣椒幼苗的根系活力、叶片叶绿素含量较低温弱光对照显著升高,MDA与Pro含量较低温弱光对照显著降低.表明0.06mmol/L的CoCl_2水溶液能够有效提高辣椒幼苗对低温弱光的适应能力.The ‘Longjiao 5＇（Capsicum annuum）seedlings were used to research the relationship between different concentrations of COCL2 and several physiological characteristics under the low temperature and poor light stress. The results indicated that the root activity and the content of leaf chlorophyll in the pepper seedlings decreased and the content of malondialdehyde （MDA） and proline （Pro） increased under the low temperature at 15 ℃/5℃ （day/night）and poor light at 100 μmol/（m2 . s）. Certain concentrations of COCL2 solution could slow the decrease of root activity and chlorophyll content and increase of MDA and Pro content. Compared with the low temperature and poor light control state,CoC12 so centration of 0.06 mmol/L significantly increased the root activ reduced the content of MDA and Pro. It indicated that CoCL2 wi effectively increase the adaptability of pepper seedlings to low t ity th and the content of the concentration of ution with the conear chlorophyll and 0. 06mmol/L could emperature and poor light.

关 键 词：辣椒 二氯化钴 低温弱光 生理指标 

分 类 号：S626.5[农业科学—园艺学]