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首页> 外文期刊>African Journal of Agricultural Research >The photosynthetic physiological properties of Illicium lanceolatum plants growing under different light intensity conditions
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The photosynthetic physiological properties of Illicium lanceolatum plants growing under different light intensity conditions

机译：不同光照强度下长白毛植物的光合生理特性

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摘要

In this study, the?photosynthetic properties and CO2?conductance?of?four-year old plants of?Illicium lanceolatum?were measured under three different light conditions (full light, half shadow and shadow) treatments. The results show that during the peak growth season, compared to those under full light, plants growing under half shadow light condition had the highest net photosynthetic rate (Pn), water usage efficiency and higher solar energy utilization efficiency (SUE), these plants had the lowest transpiration ratio (Tr) which was the strategy for achieving high photosynthesis and water utilization efficiency. Partial shading has improved SUE of plants. For plants growing under all of three light conditions, the light saturation point (LSP) increased initially then declined in response to increasing light intensity. Light compensation point (LCP) declined when plants were growing under shaded condition with less amount of light. The daily maximum value of net photosynthetic rate (Pmax) and the apparent quantum yield (AQY) decreased in the order of?half shadow>shadow>full light. There are significant differences (p ≤ 0.05) among the three light conditions. Plants growing under half shadow had the highest light utilization efficiency. Results from this study indicate that half shadow light condition is the most suitable light condition for?I. lanceolatum. The partial shade environment promoted rapid growth and accumulation of biomass of the species. This study provided the scientific bases for domestication and cultivation of shikimic acid rich plants.
机译：在这项研究中，在三种不同的光照条件（全光照，半阴影和阴影）处理下测量了四岁的轮叶八角茴香的光合特性和CO2传导。结果表明，在高峰生长季节，与全光照条件下相比，在半阴影条件下生长的植物具有最高的净光合速率（Pn），水分利用效率和较高的太阳能利用效率（SUE）。最低的蒸腾比（Tr）是实现高光合作用和水分利用效率的策略。部分遮蔽改善了植物的SUE。对于在所有三种光照条件下生长的植物，随着光强度的增加，光饱和点（LSP）最初先升高，然后下降。当植物在阴凉条件下以较少的光量生长时，光补偿点（LCP）下降。净光合速率（Pmax）和表观量子产率（AQY）的日最大值以“半影>阴影>全光”的顺序降低。三种光照条件之间存在显着差异（p≤0.05）。在半影下生长的植物具有最高的光利用效率。这项研究的结果表明，半阴影照明条件是最适合I的照明条件。披头草。部分阴影环境促进了该物种的快速生长和生物量的积累。该研究为富含sh草酸的植物的驯化和栽培提供了科学依据。

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