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Ascorbate free radical enhances vacuolization in onion root meristems
Author(s) -
HIDALGO A.,
GONZALEZREYES J. A.,
NAVAS P.
Publication year - 1989
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1989.tb01962.x
Subject(s) - vacuolization , vacuole , organelle , elongation , meristem , microbiology and biotechnology , chemistry , atpase , membrane , biochemistry , plant cell , biophysics , cytoplasm , biology , enzyme , materials science , ultimate tensile strength , gene , metallurgy , endocrinology
. Ascorbate free radical (AFR) induced cell elongation in merislems of Allium cepa roots by promoting a high vacuolization as shown by the increased vacuole volume, vacuole volume density, tonoplast surface and tonoplast surface density. Accordingly, both plasma membrane‐ and tonoplast‐associated ATPases and vacuole soluble acid phosphatase of meristematic cells were also increased. Neither the other subcellular organelles nor cell proliferation appeared to be significantly affected. It is suggested that AFR may be involved in some plasma membrane events related to the initiation of plant cell elongation.