Isozymes of the glycolytic and pentose-phosphate pathways in storage tissues of different oilseeds.

Planta ·Vol. 149 ·No. 5 ·1980-10-00 ·Pages 476-9

Ireland RJ, Dennis DT

Abstract

Isozymes of hexose-phosphate isomerase (HPI; EC 5.3.1.9), pyruvate kinase (PK; EC 2.7.1.40) and 6-phosphogluconate dehydrogenase (6PGDH; EC 1.1.1.44) have been detected in the developing cotyledons of soybean (Glycine max (L.) Merr.), safflower (Carthamnus tinctorius L.) and sunflower (Helianthus annuus L.). In each seed there are two isozymes each of PK and HPI. The isozyme patterns of 6PGDH are more complex: soybean has two forms of the enzyme, safflower three, and sunflower six. In each tissue, at least 25% of the activity of each of the three enzymes is in the plastids. This supports the proposal that the glycolytic and pentose-phosphate pathways are operating in the plastids and that the plastids are the site of long-chain fatty-acid biosynthesis in developing oilseeds.

Authors & Affiliations

2 authors, click to expand affiliations / ORCID

Ireland R J

Department of Biology, Queen's University, K7L 3N6, Kingston, Ontario, Canada.

Dennis D T

References (12)

12 references, click to expand

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Article Info

Journal

Planta

Abbr.

Planta

ISSN

0032-0935

DOI

10.1007/BF00385751

Published

1980-10-00

Pages

476-9

Language

English

Region

Germany

NLM ID

1250576

External Links

PubMed source DOI: 10.1007/BF00385751 View journal details

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Isozymes of the glycolytic and pentose-phosphate pathways in storage tissues of different oilseeds.

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