由植物碳供應與氮吸收的關係探討碳與氮之交互作用

Study the Carbon-Nitrogen Interactions by the Relationships between Carbon Supply Andnitrogen Uptake

何冠琳(Guann-Lin Her) ； 許博行(Bor-Hung-Sheu)

《中華林學季刊》 39卷1期 (2006/03) Pp. 119-131

https://doi.org/10.30064/QJCF.200603.0010

摘要

植物生理學用於解釋整株植物的生長與生產力時，是如何取決於基本代謝與所處環境，須考慮植物產生碳與氮同化產物能力的大小。氮在許多植物群聚中屬於有限的養分，且是植物最初生產力之主要限制因子。不論探討碳與氮之生物地質化學，或森林生態系碳與氮養分循環，甚至整株植物產生光合產物供給氮同化與代謝所需，都顯示碳與氮彼此能相互影響。許多研究成果指出，植物體含氮量與生長速率、光合作用速率與地上部及地下部形態具有相關性。而且，植物所蓄積的碳與氮量亦影響生長與發育，進而改變其在各個器官的分配。本文將就植物體內碳氮儲藏庫於各個器官間之分配情形、碳水化合物對氮吸收之影響，以及碳與氮同化與代謝之相互影響等方面，探討碳與氮之交互作用。

關鍵字

同化作用 ； 碳氮交互作用 ； 碳氮效益 ； 代謝作用

並列摘要

When we used tree physiology to explain the growth and production of plants which depended on basic metabolism and environment, we must consider that abilities to produce carbon and nitrogen metabolites. Nitrogen is the most limiting nutrient in many plant communities, and is the major factor affecting primary production of plant. The studies on the biogeochemistry of carbon and nitrogen, carbon and nitrogen cycle in forest ecosystems, or photosynthates supply for nitrogen assimilation and metabolism of plant indicated that carbon and nitrogen could influence each other. Many researches have shown the correlations between nitrogen status and growth rate, photosynthesis, and performances of shoots and roots of plants. However, carbon and nitrogen stored in plants were influenced by growth and development, and their allocation in tissues would be changed. In this article, we would explore the carbon-nitrogen interactions in terms of distributions carbon and nitrogen reservoirs of tissues, the effects of carbohydrates on nitrogen uptake, and the effects between assimilation and metabolism of carbon and nitrogen.

並列關鍵字

Assimilation ； Carbon-nitrogen interactions ； Carbon and nitrogen economy ； Metabolism