Open Access45Ca mobility and distribution during ripening and maturation of Rutgers and RIN tomatoes
Author(s) -
Luke R. Howard,
Antti Uusi-Rauva,
Jorma J. Laine
Publication year - 1986
Publication title -
agricultural and food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.347
H-Index - 35
eISSN - 1795-1895
pISSN - 1459-6067
DOI - 10.23986/afsci.72217
Subject(s) - ripening , calyx , chemistry , calcium , horticulture , middle lamella , botany , cell wall , food science , biology , biochemistry , organic chemistry
Radioisotope 45Ca was used to examine changes in levels of bound and soluble calcium during tomato fruit ripening, and the distribution of calcium in different regions of Rutgers and Rin (non-ripening) tomato tissue. Levels of cell wallmiddle lamella bound 45Ca decreased readily in pericarp tissue during ripening of Rutgers tomatoes with only as mall decrease being observed in RIN fruit. No significant increase in soluble 45Ca was observed for either genotype during ripening. Decreasing levels of bound and soluble 45Ca were observed from calyx to blossom end of pericarp tissue in Rutgers and RIN fruits. Low levels of bound 45Ca were found in the inner locular walls at an early stage of tomato ripening. The implication of low levels of cell wall bound calcium in relation to catabolic changes associated with ripening are discussed.