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1992 Fiscal Year Final Research Report Summary

Functions and behavior of a new type of ATPase(phosphatase) in halophytes

Research Project

Project/Area Number 03660087
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 応用生物化学・栄養化学
Research InstitutionKinki University

Principal Investigator

HIRAYAMA Osamu  Kinki University, Food Nutrition, Professor, 農学部, 教授 (80032580)

Project Period (FY) 1991 – 1992
Keywordshalophyte / ATPase / phosphatase / membrane-bound enzyme / salt-resistant enzyme
Research Abstract

A new type of ATPase or phosphatase was found in a halophyte, Solsola komaroli. It occurred in two forms of plasma membrane-bound and free, their activity ratio being 4/96. Both forms of the enzyme hydrolyzed phosphate ester of substrates in the following order ; p-nitrophenylphosphate > pyrophosphate > ADP * ATP > AMP. The activities of both enzymes were stimulated by mono- and di-valent cations, and they were strongly inhibited by molybdate and vanadate. From these properties, this enzyme should be accepted as a new type of acid phosphatase. Both forms of the enzyme were resistant to salinity, particularly the membrane-bound form was stimulated by high concentrations of salt. The present enzyme was also found in non-halophytes, soybean and cucumber, and it was distributed at an increasing concentration with an increase in salt tolerance of plants.

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] O.HIRAYAMA,M.NODA and T.TETSUO: "Characterization and distributation of acid phosphatase in a halophyte,saltwort" Phytochemistry,.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] O.HIRAYAMA and K.NAGAOKA: "Separation of inside-out and right-side-out membrane vesicles from plasma- and tonoplast-membranes of soybean and saltwort" Plant cell Physiol.

    • Description
      「研究成果報告書概要(和文)」より

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Published: 1994-03-24  

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