Surplus Carbon Drives Allocation and Plant Soil Interactions.
user-5ebe28d54c775eda72abcdf7(2020)
摘要
Plant growth is usually constrained by the availability of nutrients, water, or temperature, rather than photosynthetic carbon (C) fixation. Under these conditions leaf growth is curtailed more than C fixation, and the surplus photosynthates are exported from the leaf. In plants limited by nitrogen (N) or phosphorus (P), photosynthates are converted into sugars and secondary metabolites. Some surplus C is translocated to roots and released as root exudates or transferred to root-associated microorganisms. Surplus C is also produced under low moisture availability, low temperature, and high atmospheric CO2 concentrations, with similar below-ground effects. Many interactions among above- and below-ground ecosystem components can be parsimoniously explained by the production, distribution, and release of surplus C under conditions that limit plant growth.
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关键词
Plant soil,Photosynthesis,Phosphorus,Nutrient,Nitrogen,Microorganism,Ecosystem,Chemistry,Carbon,Agronomy
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