Preliminary study on the anatomical changes of xylem vessels in the nodal roots of rice (Oryza sativa L.).

Date

3-1988

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

TE-Tzu Chang

Co-adviser

Liwayway M. Engle

Abstract

Root characters of five upland, one dual purpose, and four low-land varieties of rice were studied, (1) to investigate the anatomical changes of the xylem vessels at different stages of vegetative growth and; (2) to determine the variation in xylem vessel number and area of the nodal roots among the ten varieties having varied reactions to field drought. The study showed that as rice develops to higher stages of growth, the xylem vessel number and area also increase. the upland and dual purpose varieties showed larger xylem vessel number and area than the lowland varieties. This could have contributed to the drought avoidance mechanism of the upland rice varieties which have higher levels of field resistance.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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