National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India.
Plants and Ecosystems (PLECO), Biology Department, University of Antwerp, BE-2610 Wilrijk, Belgium; CREAF, Cerdanyola del Vallès 08193, Catalonia, Spain.
Trends Plant Sci. 2022 Aug;27(8):749-757. doi: 10.1016/j.tplants.2022.04.009. Epub 2022 May 20.
Root exudates are well-known 'labile' sources of soil carbon that can prime microbial activity. Recent investigations suggest that the stability of labile carbon inputs in soil mostly depends upon the physical, chemical, and biological properties of the surroundings. Here, we propose that, in some ecosystems, such as forests and grasslands, root exudates can function as a source of soil organic carbon (SOC) that can be stabilized through various mechanisms leading to long-term sequestration. Increasing soil carbon sequestration is important for capturing atmospheric CO and combating climate change issues. Thus, there is an urgent need to preserve existing ecosystems and to adopt strategies such as afforestation, reforestation, and establishment of artificial grasslands to foster carbon sequestration through higher root exudate inputs in the soil.
根系分泌物是众所周知的土壤碳“活性”来源，可以启动微生物活性。最近的研究表明，土壤中活性碳输入的稳定性主要取决于周围环境的物理、化学和生物学特性。在这里，我们提出，在一些生态系统中，如森林和草原，根系分泌物可以作为土壤有机碳（SOC）的来源，通过各种机制稳定下来，从而实现长期的固存。增加土壤碳固存对于捕获大气 CO 和应对气候变化问题非常重要。因此，迫切需要保护现有生态系统，并采取造林、再造林和建立人工草地等策略，通过增加土壤中根系分泌物的输入来促进碳固存。
