Leaf anatomy of rice and corn plants-subjected to shade stress

Date

5-1991

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Bonifacio T. Mercado

Abstract

The effect of 50% and 75% exposure to sunlight on the morphology and leaf anatomy of rice and corn was studied and compared relative to plants grown under full light exposure. Results showed that rice can tolerate 75% exposure to sunlight ( or a 25% shading) in terms of height and fresh and dry weights. Leaf anatomical measurements showed that with shading all the parameters measured were reduced except for phloem diameter. Mesophyll is thickest at 50% treatment. On the other hand, corn cannot tolerate shading in terms of morphology, height, and fresh and dry weights. Shading reduced the upper and lower epidermis, diameter of phloem, midrib and vascular bundle more than it did to rice. Leaf thickness and mesophyll increased with shading, but the mean number of bulliform cells was not affected. Taking morphology, height, fresh and dry weights, and leaf anatomy as indicators of tolerance, rice can tolerate shading more than corn. This difference may find significance in certain physiological processes of the plants such as photosynthesis and photorespiration.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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