文献类型：期刊文献

中文题名：车前和紫花地丁对水分胁迫的生理反应

英文题名：The Physiological Responses of Plantago asiatica L.and Viola philippcia Cav.to Water Stress

作者：马武昌[1] 王雁[1] 彭镇华[1]

第一作者：马武昌

机构：[1]中国林业科学研究院林业研究所国家林业局林木培育重点实验室

年份：2006

卷号：19

期号：5

起止页码：633-637

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：北京市科委项目(H010610200113)部分研究内容

语种：中文

中文关键词：车前;紫花地丁;水分胁迫;抗旱鉴定;地被植物;PEG

外文关键词：Plantago asiatica ; Viola philippcia ; water stress; drought resistance identification; ground cover plant ;polyethylene glycol

分类号：S722.36

摘要：在不同浓度的PEG6000的1/2Hoagland营养液水分胁迫条件下,对处理3 d的车前和紫花地丁的净光合速率、叶绿素荧光参数、细胞电解质外渗率、相对含水量和丙二醛含量等指标进行了测定和分析。结果表明:随营养液水势的降低,车前和紫花地丁的净光合速率明显降低,在水分胁迫条件下气孔限制是车前净光合速率降低的主导因素,气孔限制和非气孔限制共同导致了紫花地丁净光合速率的下降;两种植物均具有较好的抗旱性;水分胁迫对两种植物PSⅡ的原初光能转换效率和潜在活性均产生了影响;车前和紫花地丁的细胞电解质外渗率均随着培养液水势的降低呈逐渐增大的趋势,车前的质膜稳定性高于紫花地丁。从水分胁迫条件下两种植物净光合速率、质膜透性、相对含水量和长势等方面分析,车前比紫花地丁具有更好的对水分胁迫的适应能力。
Treating with different concentration of PEG 6000 in 1/2 Hoagland nutrient solution for 3 days, the physiological indexes, such as, Pn, chlorophyll fluorescence parameters, cell membrane permeability, MDA and relative water contents of Plantago asiatica L. and Viola philippcia Car. were studied. The Pn of P. asiatica and V. philippcia gradually decreased when water stress increased. Stomatal factor was the dominant factor of Pn decreasing of P. asiatica, while the Pn decreasing of V. philippcia was induced dominantly by both stomatal and non-stomatal factors. By the stress of ψw = -0.84 MPa for 3 days, P. asiatica behaved as light water stress , while V. philippcia was moderate water stress, indicating both the plants had good drought resistance. Values of Fv/Fm and Fv/Fo in the two species gradually decreased with increasing water stress. Compared to the control, cell membrane permeability of P. asiatica and E philippcia increased by 54% and 126%, respectively, under 0.25 kg·L^-1 of PEG treatment. By the synthetic analyzing of all the indexes, the authors concluded that P. asiatica is preferable to adapt to water stress, and net photosynthetic rate, permeability and relative water content could be used for comparing the drought resistance of different species.