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Chapter 2. Legumes and climate change

By: Molero, G.
Contributor(s): Aranjuelo, I.
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: New York : Nova Science Publisher, Inc. 2017Subject(s): Legumes AGROVOC | Food security | Nitrogen fixation | Abiotic stress | Carbon dioxide AGROVOCOnline resources: Access only for CIMMYT Staff In: Legumes for global food security p. 27-40Summary: Legumes are relevant at agronomical and economical level as their high protein content (between 26 – 30%) is of primary importance for human food and animal feed. In addition, their ability to establish symbiotic relationships whit soil bacteria allows them to assimilate atmospheric N2 reducing the use of nitrogen fertilizer. Symbiotic nitrogen fixation is highly sensitive to water availability and ambient temperature determining legume development. The current book chapter provides a compilation of results from existing literature on the effect of several abiotic stress (drought, high temperature and CO2 concentration [CO2]) conditions on plant growth, nodule performance and N2 fixation. Available information confirms that increasing [CO2], water scarcity and high temperature strongly affects N2 fixation and plant growth. The effects of water and temperature stress on plant and nodule includes not only reduction on biomass production, photosynthetic rates but a decreases in leaf and nodule functioning. In the other hand, long-term high [CO2] studies remark that while plant growth in simulated as a first instance, photosynthesis down-regulation (associated whit a C/N imbalance) may limit leafN demand and hence, nodule activity.
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Book part CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Staff Publications Collection Available
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Legumes are relevant at agronomical and economical level as their high protein content (between 26 – 30%) is of primary importance for human food and animal feed. In addition, their ability to establish symbiotic relationships whit soil bacteria allows them to assimilate atmospheric N2 reducing the use of nitrogen fertilizer. Symbiotic nitrogen fixation is highly sensitive to water availability and ambient temperature determining legume development. The current book chapter provides a compilation of results from existing literature on the effect of several abiotic stress (drought, high temperature and CO2 concentration [CO2]) conditions on plant growth, nodule performance and N2 fixation. Available information confirms that increasing [CO2], water scarcity and high temperature strongly affects N2 fixation and plant growth. The effects of water and temperature stress on plant and nodule includes not only reduction on biomass production, photosynthetic rates but a decreases in leaf and nodule functioning. In the other hand, long-term high [CO2] studies remark that while plant growth in simulated as a first instance, photosynthesis down-regulation (associated whit a C/N imbalance) may limit leafN demand and hence, nodule activity.

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