陆生植物对全球环境变化的适应

全球环境变化对陆地生态系统产生了深刻影响,而陆生植物对环境变化具有一定的适应机制。在生理过程中,信号物质能够对植物的生理过程进行调节,植物会主动积累或合成小分子物质以减轻逆境的伤害。在个体水平上,植物通过调节同化物在不同器官中的分配来适应环境条件的变化;植物对水氮资源的权衡利用可以使其适应不同的资源环境条件;由于对非结构碳水化合物的奢侈利用,植物生长不会受碳供应的限制。植物生理生态过程中的适应机制会影响陆地生态系统的碳收支。只有在综合分析的基础上建立整合植物适应机理的数学模型,才能准确预测环境变化对陆地生态系统的影响。

A review on terrestrial plant acclimation to global environment change

Global environment change has great impact on terrestrial ecosystems. To some extent, however, terrestrial plants can adjust to such influences. Physiologically, signal substances regulate physiological processes and small molecular substances actively accumulated or synthesized by plants alleviate injuries induced by adversities. Individually, photoassimilate reallocation to different plant organs is a very important mechanism through which plants adapt to changes in environmental conditions. Specific plant species survive in different resource conditions resulting from water and nitrogen trade-offs. Because of profligate use of non-structural carbon, plant growth may not be limited by carbon supply. Acclimation mechanisms of plant ecophysiological processes affect carbon budget in terrestrial ecosystem. Future studies should therefore focus on analyzing synthetic acclimation mechanisms at different scales and building an integrated model of these mechanisms to make more accurate predictions of the impact of future environmental changes on terrestrial ecosystem.