Charting the isophasic endophyte of dwarf mistletoe Arceuthobium douglasii (Viscaceae) in host apical buds.

Annals of Botany
David Lye

Abstract

Dwarf mistletoes (Arceuthobium; Viscaceae) are highly specialized dioecious angiosperms parasitic on many gymnosperm hosts in the northern hemisphere. Several dwarf mistletoe species are capable of inducing an unusual form of isophasic infection in which the internal (endophytic) system proliferates even into the apical buds of its hosts. Studies of the internal endophytic system have, for the most part, focused on the parasite within secondary host tissues. The present anatomical and ultrastructural study characterizes the growth pattern of the isophasic endophytic system of Arceuthobium douglasii within the dormant apical buds of Pseudotsuga menziesii. Semi-thin serial sections from dwarf mistletoe-infected host apical buds were mounted, stained and micrographed. Graphic files were created from the serial micrographs and these files were stacked. These stacked files were utilized to describe the pattern of growth of the endophyte within the host tissue. The interface between cells of the mistletoe and host was also examined at the ultrastructural level by transmission electron microscopy. By utilizing a novel technique of superimposed graphics, the current study reveals an organized pattern of mistletoe distribution that pene...Continue Reading

References

Jan 1, 1969·Journal of Ultrastructure Research·A R Spurr
Feb 7, 2002·Tree Physiology·Martha AppleBarbara J Bond
Nov 1, 1960·Stain Technology·K C RICHARDSONE H FINKE

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Citations

May 15, 2021·American Journal of Botany·Luiza Teixeira-CostaGregorio Ceccantini

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