HISTOLOGICAL STUDIES OF SYMPTOMS IN SEMIMATURE-TISSUE NEEDLE BLIGHT OF EASTERN WHITE PINE
- 1 January 1967
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Botany
- Vol. 45 (1), 133-143
- https://doi.org/10.1139/b67-009
Abstract
The incipient symptoms of needle blight of eastern white pine (Pinus strobus L.) appear only in semimature tissues of current year needles, and the orange-red lesions then spread acropetally throughout adjacent, more mature, tissues. Semimature tissue of white pine needles is characterized by the start of the suberization of the radial and transverse walls of the endodermal cells. The first cells to break down in blighted semimature tissue occur in the mesophyll region of one of the ventral faces of the needle. Mesophyll necrosis spreads laterally to the other ventral face and finally to the dorsal face of the needle, before proceeding distally through mature tissue. Anatomical differences exist between needles collected from susceptible and non-susceptible white pines.This publication has 3 references indexed in Scilit:
- DESCRIPTION OF SEMIMATURE TISSUE OF EASTERN WHITE PINE FOLIAGE SUSCEPTIBLE TO NEEDLE BLIGHTCanadian Journal of Botany, 1962
- THE DEVELOPMENT OF FOLIAR SYMPTOMS AND THE POSSIBLE CAUSE AND ORIGIN OF WHITE PINE NEEDLE BLIGHTCanadian Journal of Botany, 1960