Chemistry of halogenated secondary metabolites of Laurencia nipponica (Rhodophyceae, Ceramiales)

Cheng, Yen See (2005) Chemistry of halogenated secondary metabolites of Laurencia nipponica (Rhodophyceae, Ceramiales). Universiti Malaysia Sabah. (Unpublished)

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Abstract

Red algae genus Laurencia, particularly Laurencia nipponica is known as a profile producer of halogenated secondary metabolites. This investigation delves upon; 1) comparative chemistry of Laurencia nipponica collected from Japan and Russia, and 2) chemical correlation between the Japanese Laurencia with its epiphytes. In the first study, results indicate that the Japanese Laurencia contained three halogenated metabolites; pacifenol (1, 2, 4, 7), prepacifenol (3, 6) and 2,10 -dibromo-3-chloro-a-chamigrene (5, 8), are of the known prepacifenol race but Russian Laurencia does not contain prepacifenol. Therefore, the Russian Laurencia is suggested to be of a new race called pacifenol race. In the second investigation Laurencia nipponica growing in Muroran, Japan, was known to be infected by epiphytes known as lanczewskia tokidae. Authority, chemical comparison showed that similar halogenated metabolites; pacifenol (1, 2, 4, 7), prepacifenol (3, 6) and 2,10-dibromo-3-chloro-a-chamigrene (5, 8), were present in the epiphytes as the host. Other members of Janczewskia are not known to contain halogenated metabolites. Therefore, this phenomenon could due to possible transfer of genomic materials that could have prompted the epiphytes to produce such secondary metabolites.

Item Type: Academic Exercise
Uncontrolled Keywords: Laurencia nipponica, secondary metabolite, epiphyte, Janczewskia, genomic material
Subjects: Q Science > QD Chemistry
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 13 Jan 2014 02:32
Last Modified: 10 Oct 2017 08:44
URI: http://eprints.ums.edu.my/id/eprint/8023

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