【摘要】 以灌木铁线莲为试材,采用盆栽方法,研究测定了水分亏缺对灌木铁线莲体内过氧化物酶(POD)活性、脯氨酸(Pro)含量、丙二醛(MDA)含量、净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)、叶绿素含量及植株冠幅增量的影响。结果表明:随着土壤相对含水量(RWC)下降,MDA含量、POD活性与Pro含量表现为显著升高,净光合速率与蒸腾速率显著降低,冠幅面积净增量显著减小,MDA、POD、Pro与RWC呈显著负相关,其中Pro对RWC下降变化最敏感。叶绿素a+b含量对RWC下降变化最不敏感。更多还原

【Abstract】 Taking Clematis fruticosaas test material,using pot experiment method,the effect of water stress on peroxidase(POD)activity,proline(Pro)content,malondialdehyde(MDA)content,net photosynthetic rate,transpiration rate,stomatal conductance chlorophyll content and crown growth of Clematis fruticosa was studied.The results showed that as the soil relative water content(RWC)decreased,malondialdehyde(MDA)content,peroxidase(POD)activity and proline(Pro)content significantly increased.Net photosynthetic rate and transpiration rate decreased significantly.The content of chlorophyll in four RWC had no significant difference.As the RWC decreased,the net increase of single plant crown area decreased significantly.The spearman correlation analysis indicated that RWC had a negative correlation with Pro,POD and MDA.Pro content was sensitive to the change of the RWC,the content of chlorophyll a+b was not sensitive to the change of the RWC.更多还原