药用植物补偿的研究。木瓜叶片对光合速率和蒸腾速率的补偿效应[j]。

O Iida, Y Hatakeyama
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引用次数: 0

摘要

为了研究罂粟叶片的补偿效应,在田间条件下,研究了叶片光合速率与光密度和叶温的关系,以及去除3个上部叶片对叶片光合速率和蒸腾速率的影响。在叶温23 ~ 28℃范围内,沙参叶片的光饱和点约为900微摩尔-2sec-1,光饱和点的光合速率约为13.5微摩尔-2sec-1。叶片的光补偿点接近50微molm-2sec-1。叶片温度对光合速率的影响是显著的,当叶片温度高于30℃时,光合速率显著降低。当去除上部3片叶片后,第4片叶片的光合速率和蒸腾速率较对照水平有增加的趋势,但增幅不显著。
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[Studies on compensation in medicinal plants. Compensative effects in leaves of Papaver somniferum L. on photosynthetic and transpiration rates].

To investigate compensative effects in leaves of Papaver somniferum L., the relation between photosynthetic rate and light density and leaf temperature, and the influences on photosynthetic and transpiration rates of removal of the three upper leaves were examined under field conditions. The light saturation point in leaves of P. somniferum was about 900 micro molm-2sec-1 and the photosynthetic rate at the light saturation point was about 13.5 micro molm-2sec-1 between 23 and 28 degrees C in leaf temperature. The light compensation point in leaves was nearly 50 micro molm-2sec-1. The influence of leaf temperature on photosynthetic rate was significant, so that the latter showed a remarkable decrease when the leaf temperature was above 30 degrees C. When the three upper leaves were removed, the photosynthetic and transpiration rates in the 4th leaf tended to increase as compared with control level, although the increases were not significant.

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