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Glucose-6-Phosphate and UDP-D-Glucose Dehydrogenases: Possible Markers of Vascular Differentiation

✍ Scribed by P. B. Gahan; A. McGarry; L. Wang; T. Doré; D. F. Carmignac

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
208 KB
Volume
8
Category
Article
ISSN
0958-0344

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✦ Synopsis

A quantitative cytochemical study of intact root apices and wounded roots of Pisum sativum, and of cotyledons from Solanum aviculare induced to form vessels from mesophyll cells, has demonstrated a sharp increase in glucose-6-phosphate dehydrogenase activity at a very early stage in the differentiation of the vascular tissues. However, UDP-D-glucose dehydrogenase activity appears to increase only at a time corresponding to the initiation of secondary cell wall events. Data from the callus cultures from Malus M27 and Cox endosperm indicated that glucose-6-phosphate dehydrogenase activity changes may be a possible marker for determining between the regenerability and recalcitrance of calluses.

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