First Advisor

Robert O. Tinnin

Term of Graduation

Spring 1975

Date of Publication

5-22-1975

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Biology

Department

Biology

Language

English

Subjects

Hemlock dwarf mistletoe -- Seeds

DOI

10.15760/etd.2279

Physical Description

1 online resource (19 pages)

Abstract

The viscin coating of seeds from Arceuthobium tsugense was analyzed histochemically. The results indicated that the viscin is composed of two components. The first is a muculagenous pectic compound which surrounds the entire seed and accounts for a number of observed phenomenon such as stickiness, water holding capacity and the ability to undergo repeated drying and rehydration. The second component is made up of a large number of cellulose strands which are attached to the endocarp and run throughout the pectic coating. Scanning electron micrographs show that they are thought to be important in maintaining the integrity of the pectic coating. The significance of these findings is discussed with respect to establishment of the parasite.

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Comments

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Persistent Identifier

http://archives.pdx.edu/ds/psu/15378

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