Effect of salt on the growth and metabolism of Glycine max

Brazilian Archives of Biology and Technology

Helena Müller Queiroz¹  Ladaslav Sodek²  Claudia Regina Baptista Haddad² 

[1] ,Universidade Estadual de Campinas Instituto de Biologia Departamento de Biologia VegetalCampinas SP ,Brasil

关键词: soybean;    stress;    amino acid transport;    asparagine;    alanine;    γ-aminobutyrate;   

DOI  :  10.1590/S1516-89132012000600002

来源: SciELO

【 摘 要 】

Soybean plants cultivated with 50, 100 and 200 mM of NaCl, revealed that root growth was less affected by salinity than shoots. Salinity led to a reduction in leaf area and an increase in water content of the roots. These factors could contribute to the adaptation of the plant, improving its hydration. Although nitrate and free amino acid levels were reduced by salt treatment in roots, protein content of leaves was not altered. Salinity led to alterations in xylem amino acid composition, with increases in Ser, Ala, Gaba and Pro and a decrease in Asn. Similar changes were seen for Asn and Ser in roots together with a much stronger increase in Gaba. It is suggested that the decline in Asn reflects its conversion to Ala and Gaba (via Glu) in the roots while the increase in Pro and Gaba could be related to the adaptation of the plant to salinity.

【 授权许可】

CC BY-NC   
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