Evaluation of glucosinolate contents of forty accessions of Pak Choi [Brassica rapa L. spp. chinensis (L.) Hanelt]

Date

5-2008

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Adelina A. Barrion

Abstract

Evaluation of total glucosinolate contents of forty accessions of Pak Choi [Brassica rapa L. ssp. chinensis (L.) Hanelt] using modified micro-column method resulted to a mean total of 9.9 ± 2.3 mole-g-i with a variance of 5.3 in dry weight, and 47.3 ± 11.7 mole-100 g', with a variance of 370.2 in fresh weight. High glucosinolate contents in fresh weight (123.2 ± 39.7 mole-100 g-1, 112.7 ± 15.7 mole-100 and 68.2 ± 20.6 mole-100 g') were found in accessions with round petioles, namely: Yellow Stem (Local Variety), Yellow Leaf (Local Variety), and Green Stem (Local Variety), respectively. The lowest glucosinolate content was found to be 28.6 ± 10.9 mole/100 g-1 (Aijiao Datou Qingjiang Pakchoi). In terms of petiole type, the accessions with thin-type of petiole contained higher total glucosinolates than those with fleshy-type of petioles. Compared with similar study earlier conducted by He in 2003, this study obtained lower mean glucosinolate value, almost one half of the previous result, 84.74 mole/100 The differences in glucosinolate contents could be attributed to the differences in environmental conditions (time, season, and climates).

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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