Accumulation of Amino Acids and Related Compounds in Relation to Environmental Stress
1980; Elsevier BV; Linguagem: Inglês
10.1016/b978-0-12-675405-6.50023-1
Autores Tópico(s)Legume Nitrogen Fixing Symbiosis
ResumoThis chapter discusses the accumulation of amino acids and related compounds in relation to environmental stress. Amino acids and other soluble nitrogenous compounds play essential roles in plant metabolism, being the primary products of inorganic nitrogen assimilation and precursors of proteins and nucleic acids. The chapter describes the influence of some environmental stresses, both physical and biological, on the metabolism of soluble nitrogenous compounds. The soluble nitrogen fraction in plants is markedly affected by severe mineral element deficiency; both the concentration and composition of this fraction changes in response to deficiencies of particular mineral elements. All mineral deficiencies, with the exception of nitrogen and molybdenum, promote an increase in the soluble nitrogen fraction. Arginine, like the amides, often accumulates in response to deficiencies of most macro and many micro nutrients. The accumulation of amides and arginine in response to mineral deficiencies can reflect their role as nitrogenous storage compounds.
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