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首页> 外文期刊>PLoS One >Drought does not induce crassulacean acid metabolism (CAM) but regulates photosynthesis and enhances nutritional quality of Mesembryanthemum crystallinum
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Drought does not induce crassulacean acid metabolism (CAM) but regulates photosynthesis and enhances nutritional quality of Mesembryanthemum crystallinum

机译：干旱不会诱导奇曲素酸代谢（凸轮），但调节光合作用并增强培养物的营养品质

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Physiology and nutritional quality of a facultative CAM plant Mesembryanthemum crystallinum under drought stress alone are poorly understood. To induce drought, M . crystallinum was cultured aeroponically with different nutrient spraying intervals such as 5, 30, 60 and 240 min. The long spraying interval such as 240 min resulted in lower mass of root and shoot, shorter total root length with less tips and smaller surface area, compared to short interval of 5 min. Grown under the longest spraying interval of 240 min, M . crystallinum also had significantly higher leaf dry matter content but lower leaf succulence. However, CAM acidity was undetectable for any plants . Although M . crystallinum grown under extended spraying intervals had higher photosynthetic pigments, they utilized lesser light energy and did not dissipate heat as effectively as those grown under 5 min. Compare to other shorter spraying intervals, photosynthetic gas exchange rates were significantly reduced under 240 min spraying interval, indicating signs of water deficit stress. Shoot nitrate, total reduced nitrogen, total soluble protein and Rubisco concentrations were similar for all plants. For phytochemicals and dietary minerals, plants grown under 240 min spraying interval had significantly higher values than the other plants. Therefore, drought does not result in the induction of CAM but regulates photosynthetic performance and enhances nutritional quality of M . crystallinum .
机译：单独干旱胁迫下，伴随着伴随凸起的伴随凸起的植物植物Mesembryanthemum的生理学和营养质量差不多。诱导干旱，m。用不同的营养喷雾间隔（如5,30,60和240分钟为特性培养结晶素。长喷射间隔，如240分钟导致较低的根和芽，较短的根长度，尖端较小，表面积较小，与短间隔为5分钟。在240分钟的最长喷雾间隔下成长，m。结晶素还具有明显更高的叶片干物质含量，但叶片肉体较低。然而，任何植物都无法检测到凸轮酸度。虽然米。在延长喷涂间隔下生长的晶体素具有较高的光合色素，它们利用较小的光能，并且不会像在5分钟内那些生长的那些一样有效地散发热量。与其他较短的喷涂间隔进行比较，在240分钟的喷涂间隔下，光合煤气汇率显着降低，表明水赤字应力的迹象。所有植物都相似，芽硝酸盐，总降低，总可溶性蛋白质和Rubisco浓度相似。对于植物化学和饮食矿物质，在240分钟的喷雾间隔下生长的植物显着高于其他植物。因此，干旱不会导致凸轮的诱导，但调节光合性能并提高M的营养质量。结晶。

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