Master's Theses

Date of Award

Fall 1976

Degree Name

Master of Science (MS)

Department

Biology

Advisor

G. K. Hulett

Abstract

The sequence of events in the life history of Yucca glauca were disclosed as leaf set initiation, growth and development, maturation and reproduction, and senescence. Procedures for collecting newly emerged leaf sets and for measuring peduncle growth are described. Normal leaf set emergence takes place in autumn, and continues to develop and grow the following year. Flowering occurs during the spring of the third calendar year, whereas original leaf set senescence begins in late summer and terminates by late autumn. The perpetuation and reproduction of the species was determined as largely asexual by rhizome development, and the adaptive growth strategies of Y. glauca are discussed in terms of its origin and co- evolutionary development with the Yucca moth (Tegeticula maculata and T. yuccasella) and it's relationships to herbivores and certain physical phenomena.

Rights

Copyright 1976 Larry Lynn Todd

Comments

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