摘要
为探究党参在水涝胁迫下所发生的生理生化响应,采用盆栽控水法对党参在不同程度水涝胁迫下党参植株的生长、生理特性、多糖含量进行测定,以期为党参的科学栽培和管理提供依据。结果表明:在水涝胁迫处理下,党参所在的同一物候期较正常灌水下滞后且随着水涝胁迫的加剧,物候期滞后现象更明显;在重度、轻度水涝胁迫下,党参叶片的超氧化物歧化酶、过氧化物酶、过氧化氢酶活性在处理14~56d内一直上升,之后下降;其可溶性蛋白含量在处理42d之后下降;其可溶性糖含量在70d内持续降低而丙二醛含量一直升高;党参植株随着水涝胁迫程度的加重更不利于地上部分鲜重、根鲜重、总生物量以及地下部分多糖含量的积累。因此降雨时应及时排水,确保排水深度至根系集中分布层以下,以优化党参植株培育、提高其产量。
To study the physiological and biochemical response of Codonopsis pilosula under waterlogging stress,the growth,physiological characteristics and polysaccharide content of C.pilosula under waterlogging stress of different degrees were measured with the method of controlling water by potted planting,with a hope to provide a basis for scientific cultivation and management of C.pilosula.The results show that,under the waterlogging stress,the same phenophase of C.pilosulalags behind that under normal irrigation conditions,and the lagging aggravates as the aggravation of waterlogging stress;under severe and mild waterlogging stress,the SOD,POD,CAT activity of C.pilosulaleaf keep rising within 14 to 56 days after treatment,and then fall;the soluble protein content decreases on the 42 th day after treatment;the soluble saccharide content constantly decreases,while the content of MDA keeps increasing within 70 days;with the aggravation of waterlogging stress,it is less conducive to accumulate the fresh weight of ground part,root fresh weight,total biomass and underground polysaccharide content of C.pilosula.Therefore,drainage measures should be taken timely in rainy season,and it should be ensured that at least the concentrated distribution layer of root system is not under waterlogging stress,so as to optimize the cultivation and yield of C.pilosula.
出处
《浙江理工大学学报（自然科学版）》
2017年第6期893-900,共8页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
"十二五"国家科技支撑计划项目(2015BAC01B03)
