Title

The guard cells complex of Astragalus in Utah

Abstract

It is the intent of the author to investigate the evolution of Astragalus in Utah. Variation in the stomatal complex of the leaf epidermis was the primary mechanism used to study this problem the results of which were related to a posslble phylogenetic scheme for the genus. Stomatal complexes of 72 of the 128 species and varieties of Astragalus known to occur in Utah were studied using plastic impressions of the epidermal leaf tissue. The stomatal complex of each species and variety treated in this study was illustrated and then phylogenetically analyzed by 4 criteria: (1) size relationships between cells surrounding the stoma and cells in the ground epidermis; (2) variation (in percent) of the number of cells surrounding the stoma at the interspecific and intervarietal levels; ( 3) the mean length (in microns) of the guard cells; and ( 4) the number of stoma per square millimeter.

Degree

MS

College and Department

Plant and Wildlife Sciences

Rights

http://lib.byu.edu/about/copyright/

Date Submitted

1965-08-01

Document Type

Thesis

Handle

http://hdl.lib.byu.edu/1877/Letd428

Keywords

Astragalus

Language

English

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