Cloning of cDNA for a cell wall-bound acid invertase from tomato (Lycopersicon esculentum) and expression of soluble and cell wall-bound invertases in plants and wounded leaves of L. esculentum and L. peruvianum

Genes Genet Syst. 1998 Jun;73(3):149-57. doi: 10.1266/ggs.73.149.

Abstract

A cDNA, Wiv-1, for an isozyme of acid invertase (EC 3.2.1.26) was cloned from wounded leaves of tomato (Lycopersicon esculentum). The encoded protein had a basic isoelectric point and strong similarity to the amino acid sequences of plant cell wall-bound invertases. The conserved sequence WECPD that is found in all plant cell wall-bound invertases was also found in the deduced protein. These results suggested that Wiv-1 encoded a cell wall-bound acid invertase of tomato. Wounding increased the levels of mRNAs for soluble and cell wall-bound invertases and the activities of these invertases in leaves of L. esculentum and of a related species, L. peruvianum. The induction of Aiv-1 mRNA for the soluble enzyme in wounded leaves was not very strong, while that of Wiv-1 mRNA for the wall-bound enzyme was prominent. The level of Aiv-1 mRNA reached a maximum 48 h after wounding while that of Wiv-1 mRNA continued to rise for up to 96 h. These findings suggested that the genes for the two isozymes responded independently to wounding. The levels in various organs of Aiv-1 and Wiv-1 mRNAs were higher in L. esculentum than in L. peruvianum. Possible roles of cell wall-bound acid invertase in wound response and in developing plant are discussed.

MeSH terms

  • Amino Acid Sequence
  • Base Sequence
  • Blotting, Southern
  • Cell Wall
  • Cloning, Molecular
  • DNA, Complementary
  • DNA, Plant
  • Gene Expression
  • Glycoside Hydrolases / genetics*
  • Lycopersicon esculentum / enzymology*
  • Lycopersicon esculentum / genetics
  • Molecular Sequence Data
  • Plant Leaves
  • Polymerase Chain Reaction
  • RNA, Plant / analysis
  • Solubility
  • beta-Fructofuranosidase

Substances

  • DNA, Complementary
  • DNA, Plant
  • RNA, Plant
  • Glycoside Hydrolases
  • beta-Fructofuranosidase

Associated data

  • GENBANK/AB004558