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Life Sciences | Legume Nitrogen Fixation in a Changing Environment - Achievements and Challenges

Legume Nitrogen Fixation in a Changing Environment

Achievements and Challenges

Sulieman, Saad, Tran, Lam-Son Phan (Eds.)

2015, Approx. 150 p. 40 illus., 20 illus. in color.

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  • About this book

  • Up-to-date information on legume-Rhizobium symbiosis
  • Effects of climate change on crop yields
  • Solutions to mitigate environmental stresses on nitrogen fixation
The world population will grow more rapidly during the few coming years. This must be accompanied by a parallel increase in the agricultural production to secure adequate food. Sustainability considerations mandate that alternatives to chemical nitrogen fertilizers must be urgently sought. Biological nitrogen (N2) fixation, a microbiological process which converts atmospheric N2 into a plant-usable form, offers this alternative. Among these renewable sources, N2-fixing legumes offer an economically attractive and ecologically sound means of reducing external inputs and improving internal resources. Environmental factors such as drought, elevated temperature, salinity, soil acidity and rising CO2 are known to dramatically affect the symbiotic process and thus play a part in determining the actual amount of nitrogen fixed by a given legume in the field. Understanding how nodule N2 fixation responds to the environment is crucial for improving legume production and maintaining sustainability in the context of global change. In this thoughtful and provocative new Brief, we provide critical information on how current and projected future changes in the environment will affect legume growth and their symbiotic N2 fixing capabilities. Each section reviews the main drivers of environmental change on the legume performance that include drought, elevated temperature, salinity and rising CO2, and soil acidity. Importantly we discuss the molecular approaches to the analysis of the stress response in legumes and the possible biotechnological strategies to overcome their detrimental effects.

Content Level » Research

Keywords » abiotic stress - climate change - functional genomics - plant adaptations - plant metabolism - symbiosis

Related subjects » Agriculture - Ecology - Life Sciences - Microbiology - Plant Sciences

Table of contents 

Physiological responses of legume Nitrogen fixation to water limitation.- Salinity: physiological impacts on legume Nitrogen fixation.- How does high temperature affect legume nodule symbiotic activity.- Will elevated CO2 level amplify the benefits of symbiotic Nitrogen fixation in legumes.- Nodule physiological implications associated with soil acidity.

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