Activity of sucrose synthase and soluble acid invertase following germination of pinyon (Pinus edulis) seeds

The developmental pattern and relative activities of sucrose synthase (EC 2.4.1.13) and soluble acid invertase (EC 3.2.1.26), and the associated contents of sucrose and hexoses, were analyzed in the cotyledons, hypocotyl, and radicle of pinyon (Pinus edulis Engelm.) seedlings following radicle emerg...

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Veröffentlicht in:Canadian journal of forest research 1992-04, Vol.22 (4), p.442-446
Hauptverfasser: Murphy, J.B, Rutter, M.R, Hammer, M.F
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creator Murphy, J.B
Rutter, M.R
Hammer, M.F
description The developmental pattern and relative activities of sucrose synthase (EC 2.4.1.13) and soluble acid invertase (EC 3.2.1.26), and the associated contents of sucrose and hexoses, were analyzed in the cotyledons, hypocotyl, and radicle of pinyon (Pinus edulis Engelm.) seedlings following radicle emergence. Sucrose synthase activity did not appear to be correlated with organ growth, but showed a close association with sucrose content. Conversely, there was a high degree of correlation between soluble acid invertase activity and growth of the various organs. Hexose content also was correlated with the level of invertase activity. Thus, soluble acid invertase appeared to be directly involved in providing respiratory and biosynthetic substrates in growing organs, while the role of sucrose synthase was less clear, being more active in tissues that are involved in sucrose import and transport and possibly sucrose to starch conversion.
doi_str_mv 10.1139/x92-058
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Sucrose synthase activity did not appear to be correlated with organ growth, but showed a close association with sucrose content. Conversely, there was a high degree of correlation between soluble acid invertase activity and growth of the various organs. Hexose content also was correlated with the level of invertase activity. Thus, soluble acid invertase appeared to be directly involved in providing respiratory and biosynthetic substrates in growing organs, while the role of sucrose synthase was less clear, being more active in tissues that are involved in sucrose import and transport and possibly sucrose to starch conversion.</description><identifier>ISSN: 0045-5067</identifier><identifier>EISSN: 1208-6037</identifier><identifier>DOI: 10.1139/x92-058</identifier><identifier>CODEN: CJFRAR</identifier><language>eng</language><publisher>Ottawa, Canada: NRC Research Press</publisher><subject>Agronomy. 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identifier ISSN: 0045-5067
ispartof Canadian journal of forest research, 1992-04, Vol.22 (4), p.442-446
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language eng
recordid cdi_crossref_primary_10_1139_x92_058
source Alma/SFX Local Collection
subjects Agronomy. Soil science and plant productions
beta-fructofuranosidase
Biological and medical sciences
cotyledons
Economic plant physiology
Embryo development. Germination
enzyme activity
Fundamental and applied biological sciences. Psychology
growth
Growth and development
hexoses
hypocotyls
Pinus edulis
radicles
seed germination
seeds
sucrose
sucrose synthase
title Activity of sucrose synthase and soluble acid invertase following germination of pinyon (Pinus edulis) seeds
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