Morpho-physiological characterization of UPLB hybrid 53 and its parents (A. microphylla 4018 and A. caroliniana 3004)

Date

3-1990

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Pacifico C. Payawal

Abstract

The effect of varying phosphorus and pH levels on the doubling time, root, length, root number, heterocyst index and chlorophyll content of Azolla UPLB Hybrid 53 and its parent (A. microphylla and A. caroliniana 3004) was studied. The pathogenicity of three fungi namely Scierotium sp. And Rhizoctonia-Like isolate nos. 1 and 8 on the three strains was also tested. Results revealed that the strains differ in their optimum phosphorus and pH requirements for efficient growth process as simplified by the significant differences observed in the parameters mentioned. Deficiency symptoms were observed in plants grown in the absence of phosphorus. On the other hand, the test plants were found to be non-tolerant to extremes of pH. At pH 8, all strains survived but their performance was not as efficient as in pH 5. Among the strains, A. Caroliniana was found to be the most susceptible to all three pathogens. While UPLB Hybrid 53 appeared to be the resistant strain. Sclerotium sp. Was the most pathogenic and A. microphylla was the most susceptible to this pathogen.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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