Cytochemical Localization of Phosphatase in Differentiating Secondary Vascular Cells

Overview

Journal Planta

Specialty Biology

Date 2014 Feb 8

PMID 24504755

Citations 6

Authors

A W Robards

P Kidwai

Affiliations

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Abstract

Phosphatase activity was studied in the cambium and differentiating vascular cells of beech by using a modified Washstein and Meisel method. After fixation in glutaraldehyde or crotonaldehyde and incubation in a medium containing ATP and lead nitrate at pH 7.2, a deposit of electron-opaque granules was found in the nucleoli, nucleoplasm, nuclear envelope, endoplasmic reticulum, plastids, mitochondria, and at the plasmalemma. Although located at these different sites, the distribution varied both inter- and intra-cellularly. This is thought to be a true reflection of the variation in activity between closely adjacent cells in this part of the stem.Some reaction was obtained when ADP replaced ATP in the reaction mixture, but there was no reaction at all when both ATP and ADP were omitted. Fixation in hydroxyadipaldehyde, or incubation at pH 6.4 both produced very little reaction.

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