Date of Award

1975

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Biology

Department

Biology

Physical Description

1 online resource (26 p.)

Subjects

Viscin, Hemlock dwarf mistletoe -- Seeds

DOI

10.15760/etd.2279

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.

Description

A thesis submitted in partial fulfillment of the requirements for the degree of Mater of Science in Biology

Persistent Identifier

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

Included in

Biology Commons

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