Growth responses of some Philippine test plants to gibberellic acid

Date

3-1959

Degree

Bachelor of Science in Agriculture

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Jose R. Velasco

Co-adviser

Feliciano C. Manuel

Abstract

Gibberellic acid (GA) in aqueous solution was found to cause extensive cell elongation in the stem of intact mongo plants. The compound was observed to persist in the plant fer about 10 days regardless of the concentration. It was evident the its effectivity decreased with the age of the plant.

There were indications that GA interacted synergistically with ezogenous NAA, sucrose and urea.

When applied to poinsettia, a short day plant grown under different day-length regimes, GA was found to effect a complete reversal of the long-day inhibition of stem elongation in short- day plants. Gibberellic acid cannot in itself initiate flowering in this plant placed under inhibitory long-day conditions. The compound delayed the appearance of the highly pigmented floral leaves; evidently, it was blocking anthocyanin synthesis.

Gibberellic acid did not break dormancy in seeds used in the study.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Notes

Botany

Document Type

Thesis

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