Comparative Stem Photosynthesis between Desert and Mediterranean Legumes

虽然茎是第二重要的光合器官，但我们对茎的光合作用知之甚少。关于茎光合作用对不同气候条件的适应或驯化，我们所知甚少。对不同气候条件下植物叶片光合作用的比较研究对于了解植物在不同生境中生存的机制至关重要。需要对茎光合作用进行类似的研究，特别是在地中海和沙漠分类群中，以了解茎光合作用的意义。本提案的目的是测量地中海和沙漠分类群在冬季和夏季的茎光合作用。这些结果的比较将测试茎对这些不同栖息地的光合适应性。此外，还将建立冠层茎部光合作用的数学模型。该模型将能够预测在一系列不同栖息地中茎光合作用对物种多样性的重要性。这项研究将极大地扩展我们对植物茎部光合作用意义的认识。这些信息可用于分析植物在各种环境下的成功情况。此外，本研究收集的数据对于了解农业生态系统中茎光合作用对豆科作物生长的重要性至关重要。

Although stems are the second most important photosynthetic organ, very little is known about stem photosynthesis. Little is known about adaptation or acclimation of stem photosynthesis to different climatic conditions. Studies of comparative leaf photosynthesis on plants from different climates have been pivotal to understanding the mechanisms by which plants survive in a diversity of habitats. Similar studies on stem photosynthesis, particularly in mediterranean and desert taxa, are required to understand the significance of stem photosynthesis. The objective of this proposal is to measure stem photosynthesis for mediterranean and desert taxa during the winter and summer. Comparisons of these results will test for stem photosynthetic adaptation to these different habitats. Furthermore, a mathematical model of canopy stem photosynthesis will be developed. The model will be able to predict the importance of stem photosynthesis to a diversity of species in a series of different habitats. This research will greatly expand our knowledge about the significance of stem photosynthesis to plants. This information can be applied to analyses of plant success in various environments. Furthermore, the data collected in this study are crucial for understanding the importance of stem photosynthesis to growth of legume crops in agroecosystems.