Premium
ASSOCIATION OF α‐AMYLASE WITH CELLULAR AUTOLYSIS IN PEA STEM TISSUES
Author(s) -
Davis Bill D.
Publication year - 1985
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1985.tb08463.x
Subject(s) - plant stem , autolysis (biology) , biology , pith , amylase , starch , invertase , botany , hypocotyl , etiolation , carbohydrase , sucrose , biochemistry , enzyme
Increased activity of α‐amylase in bean stems occurred during cellular autolysis in the pith region. In etiolated pea seedlings, α‐amylase activity increased sequentially in the first, second, and third internodes. In light‐grown seedlings, the increase was initially observed in the first internode, then simultaneously in the second and third internodes. In all internodes, these changes were observed in regions undergoing cellular autolysis in the cortex region. As in bean hypocotyls, α‐amylase activity occurred in tissues virtually devoid of starch. Sequential accumulation and then decline in protein and sugar concentrations in each internode indicate a remobilization of materials from nongrowing regions of the stem. These results are consistent with the hypothesis that regulation of α‐amylase activity is related to this remobilization.