【摘要】 研究了不同磷营养水平对睡莲 (NymphaeatetragonaGeorgi.)和菱 (TrapabispinosaRoxb .)叶生理活性的影响 .结果表明 :随磷营养水平的升高 ,叶内的无机磷含量升高 ,叶绿素含量基本呈下降趋势 ,Chla/Chlb升高 ;对多肽组分无明显影响 ;光合速率、呼吸速率、菱叶的ATP含量、睡莲叶的有机磷含量和PSII电子传递活性都呈现钟罩形的变化趋势 ,在最适磷浓度时达到最高 ,低或高的磷水平下都有所降低 .在本实验条件下菱的最适磷浓度为 0 .1mmol/L ,睡莲的最适磷浓度为 0 .5mmol/L .光呼吸速率在低磷营养水平下较高 ,表明低磷促进光呼吸 .淀粉含量的变化趋势在两种植物中不同 ,在菱叶中呈先升高后降低趋势 ,在睡莲中则呈先降低后升高趋势更多还原

【Abstract】 The effect of phosphorus nutrition on physiological activity of Nymphaea tetragona Georgi .and Trapa bispinosa Roxb .leaves was studied.The results showed:with increasing concentration of P nutrition, the P i content in leaves and the ratio of Chl a/b were raised, chlorophyll concentration decreased,the polypeptide compositions were not changed obviously.The photosynthetic and respiratory rate, ATP content in Trapa bispinosa Roxb .leaves, P content of leaves and PSII activity of thylakoid membrane in Nymphaea tetragona Georgi .all showed the same trend:they got to the highest value at the optimum P supply level, decreased at higher or lower P level.Acording to our research, the optimum concentration of P supply to Trapa bispinosa Roxb .is 0.1?mmol/L and Nymphaea tetragona Georgi .is 0.5?mmol/L.Photorespiration was enhanced by low P nutrition.The response of starch content to phosphorus nutrition in the two water plants leaves was different.更多还原