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首页> 外文期刊>Turkish journal of biology >Photosynthetic characteristics of red and green leaves in growing seedlings of Jatropha curcas
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Photosynthetic characteristics of red and green leaves in growing seedlings of Jatropha curcas

机译：麻疯树幼苗的红绿叶片光合特性。

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摘要

The use of Jatropha (Jatropha curcas L.) as a source of biofuel is documented. The physiological characteristics and growth studies of Jatropha have received less attention. In the present study, we measured leaf gas exchange with an infrared gas analyzer for red (immature) and green (mature) leaves of Jatropha curcas in response to various environmental conditions including photosynthetic photon flux density (PPFD), vapor pressure difference, and temperature. The seedlings were grown in pots for 45 days in a natural environment. Jatropha is a C_3 plant based on its leaf–gas exchange characteristics. The optimal light-saturated photosynthetic CO_2 assimilation, leaf conductance, and transpiration occurred in the range of 500–1000 μmol m~(–2) s~(–1) PPFD, depending upon the leaf positions and leaf types during growth. The net rates of photosynthesis, stomatal conductance, transpiration, and water-use efficiency were significantly affected by the leaf position and epigenetic variables, i.e. temperature, vapor pressure difference, and irradiance.
机译：有文献记载麻风树（Jatropha curcas L.）用作生物燃料的来源。麻风树的生理特性和生长研究受到的关注较少。在本研究中，我们使用红外气体分析仪测量了麻风树的红色（未成熟）和绿色（成熟）叶子的叶片气体交换，以响应各种环境条件，包括光合光子通量密度（PPFD），蒸气压差和温度。在自然环境中，将幼苗在盆中生长45天。麻风树是一种C_3植物，基于其叶片-气体交换特性。最佳的光饱和光合CO_2同化，叶片电导和蒸腾作用发生在PPFD的500–1000μmolm〜（–2）s〜（–1）PPFD范围内，具体取决于生长过程中的叶片位置和叶片类型。光合作用，气孔导度，蒸腾作用和水分利用效率的净速率受叶片位置和表观遗传变量（即温度，蒸气压差和辐照度）的显着影响。

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