Variations in Leaf Soluble Amino Acids and Ammonium Content in Subtropical Seagrasses Related to Salinity Stress | Zendy

Warren M. Pulich | Zendy

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Variations in Leaf Soluble Amino Acids and Ammonium Content in Subtropical Seagrasses Related to Salinity Stress

Author(s) -

Warren M. Pulich

Publication year - 1986

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.80.1.283

Subject(s) - salinity , proline , botany , ammonium , biology , amino acid , subtropics , chemistry , ecology , biochemistry , organic chemistry

A survey of leaf soluble amino acids was conducted for four subtropical seagrasses grown at several salinities. Proline functioned as an organic osmoticum in Halodule wrightii Aschers., Thallasia testudinum Banks ex Koenig, and Ruppia maritima L., while alanine functioned in an osmoregulatory capacity in Halophila engelmanni Aschers. When light-and salinity-induced variations in leaf NH(4) and amide-N levels were compared in Halodule, Thalassia, and Halophila, ability to regulate leaf NH(4) levels was correlated with osmoregulatory capacity and maintenance of selected amino acid contents.

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