Systematic studies of giamensis and hanneae complexes (Homalomena : Homalomeneae : Araceae)

Homalomena Schott is one of the most abundant, speciose, least understood aroid genera in Tropical Southeast Asian. Taxonomy, pollination investigations, floral odour analyses and phylogeny of six Homalomena species in Hanneae and Giamensis Complexes were investigated in this study. Three new spe...

Full description

Saved in:

Bibliographic Details
Main Author:	Hoe, Yin Chen
Format:	Thesis
Language:	English
Published:	2012
Subjects:	SB Plant culture
Online Access:	http://ir.unimas.my/id/eprint/14229/1/Hoe%20Yin.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-unimas-ir.14229
record_format	uketd_dc
spelling	my-unimas-ir.142292023-05-03T07:02:29Z Systematic studies of giamensis and hanneae complexes (Homalomena : Homalomeneae : Araceae) 2012 Hoe, Yin Chen SB Plant culture Homalomena Schott is one of the most abundant, speciose, least understood aroid genera in Tropical Southeast Asian. Taxonomy, pollination investigations, floral odour analyses and phylogeny of six Homalomena species in Hanneae and Giamensis Complexes were investigated in this study. Three new species- Homalomena gastrofructa sp. nov. ined. Y. C. Hoe, S. Y. Wong & P. C. Boyce, H. velutipedunculata sp. nov. ined. Y. C. Hoe, S. Y. Wong & P. C. Boyce and H. baangongensis sp. nov. ined. L. S. Tung & Y. C. Hoe were discovered The main pollinator for all the seven Homalomena species is Parastasia spp. (Scarabaeidae: Rutelinae). Chrysomelids (Chaleonus schawalleri, Chaleonus spp. & Deceptina sp. (Coleoptera: Chrysomelidae) are the opportunist pollinators. Colocasiomyia (Diptera: Drosophilidae), Trigona sp. (Apinae: Meliponini), unidentified earwigs (Dermaptera), unidentified pale yellow and orange chrysomelids (Coleoptera: Chrysomelidae), unidentified Nitidulidae and Staphylinidae are merely visitors. The food reward interpistillar staminode is the main pollinator attraction. Pollinator Parastasia spp. that consumed the interpistillar staminode is regarded as highly mutualistic between Parastasia-Homalomena. During pistillate anthesis (Hanneae Complex) floral odour serves to attract and retain insect pollinator until the end of the anthesis by remitting second less intensified odour during staminate anthesis. Floral odour serves to attract insect pollinator only in pistillate anthesis (Giamensis Complex) but did not or weakly remitted flora odour during staminate anthesis. Gas chromatography-mass spectrometry (GC-MS) analyses reveal three compounds: Cyclohexane, 2-ethenyl-l, l-dimethyl-3-methylene-, Cyclohexane, 4- methyl-2-methylene-l-(1-methylethylidene)- and Cyclohexene, 4-methyl-3-(1- methylethylidene)- and these have never been reported in Araceae. Hanneae Complex species can be represented by 1) majorly produce Terpenoid compounds especially alpha-pinene). Whereelse Giamensis Complex species can be differentiated by 1) emitting majority compound of Acetic Acetic acid, butyl ester and Furan, 3-(4-methyl-3-pentenyl)- but absent during staminate anthesis. Phylogeny was constructed for 17 taxa of all the complexes in Cyrtocladon, Homalomena, Punctulata and Chamaecladon Supergroups based on the nuclear internal transcribed spacer. The aligned sequences were analysed in PAUP* 4.0blO for maximum parsimony and `Advanced Mode' analyses for maximum likelihood. The tree supported delimitation of Hanneae and Giamensis Complexes from taxonomy, pollination, floral odour were mapped onto the phylogenetic tree to provide further evidences on the separation of both Complexes. This study provided an indepth investigation to explain the high level of biodiversity in the genus Homalomena in Borneo. Universiti Malaysia Sarawak (UNIMAS) 2012 Thesis http://ir.unimas.my/id/eprint/14229/ http://ir.unimas.my/id/eprint/14229/1/Hoe%20Yin.pdf text en validuser masters Universiti Malaysia Sarawak Faculty of Resource Science and Technology
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English
topic	SB Plant culture
spellingShingle	SB Plant culture Hoe, Yin Chen Systematic studies of giamensis and hanneae complexes (Homalomena : Homalomeneae : Araceae)
description	Homalomena Schott is one of the most abundant, speciose, least understood aroid genera in Tropical Southeast Asian. Taxonomy, pollination investigations, floral odour analyses and phylogeny of six Homalomena species in Hanneae and Giamensis Complexes were investigated in this study. Three new species- Homalomena gastrofructa sp. nov. ined. Y. C. Hoe, S. Y. Wong & P. C. Boyce, H. velutipedunculata sp. nov. ined. Y. C. Hoe, S. Y. Wong & P. C. Boyce and H. baangongensis sp. nov. ined. L. S. Tung & Y. C. Hoe were discovered The main pollinator for all the seven Homalomena species is Parastasia spp. (Scarabaeidae: Rutelinae). Chrysomelids (Chaleonus schawalleri, Chaleonus spp. & Deceptina sp. (Coleoptera: Chrysomelidae) are the opportunist pollinators. Colocasiomyia (Diptera: Drosophilidae), Trigona sp. (Apinae: Meliponini), unidentified earwigs (Dermaptera), unidentified pale yellow and orange chrysomelids (Coleoptera: Chrysomelidae), unidentified Nitidulidae and Staphylinidae are merely visitors. The food reward interpistillar staminode is the main pollinator attraction. Pollinator Parastasia spp. that consumed the interpistillar staminode is regarded as highly mutualistic between Parastasia-Homalomena. During pistillate anthesis (Hanneae Complex) floral odour serves to attract and retain insect pollinator until the end of the anthesis by remitting second less intensified odour during staminate anthesis. Floral odour serves to attract insect pollinator only in pistillate anthesis (Giamensis Complex) but did not or weakly remitted flora odour during staminate anthesis. Gas chromatography-mass spectrometry (GC-MS) analyses reveal three compounds: Cyclohexane, 2-ethenyl-l, l-dimethyl-3-methylene-, Cyclohexane, 4- methyl-2-methylene-l-(1-methylethylidene)- and Cyclohexene, 4-methyl-3-(1- methylethylidene)- and these have never been reported in Araceae. Hanneae Complex species can be represented by 1) majorly produce Terpenoid compounds especially alpha-pinene). Whereelse Giamensis Complex species can be differentiated by 1) emitting majority compound of Acetic Acetic acid, butyl ester and Furan, 3-(4-methyl-3-pentenyl)- but absent during staminate anthesis. Phylogeny was constructed for 17 taxa of all the complexes in Cyrtocladon, Homalomena, Punctulata and Chamaecladon Supergroups based on the nuclear internal transcribed spacer. The aligned sequences were analysed in PAUP* 4.0blO for maximum parsimony and `Advanced Mode' analyses for maximum likelihood. The tree supported delimitation of Hanneae and Giamensis Complexes from taxonomy, pollination, floral odour were mapped onto the phylogenetic tree to provide further evidences on the separation of both Complexes. This study provided an indepth investigation to explain the high level of biodiversity in the genus Homalomena in Borneo.
format	Thesis
qualification_level	Master's degree
author	Hoe, Yin Chen
author_facet	Hoe, Yin Chen
author_sort	Hoe, Yin Chen
title	Systematic studies of giamensis and hanneae complexes (Homalomena : Homalomeneae : Araceae)
title_short	Systematic studies of giamensis and hanneae complexes (Homalomena : Homalomeneae : Araceae)
title_full	Systematic studies of giamensis and hanneae complexes (Homalomena : Homalomeneae : Araceae)
title_fullStr	Systematic studies of giamensis and hanneae complexes (Homalomena : Homalomeneae : Araceae)
title_full_unstemmed	Systematic studies of giamensis and hanneae complexes (Homalomena : Homalomeneae : Araceae)
title_sort	systematic studies of giamensis and hanneae complexes (homalomena : homalomeneae : araceae)
granting_institution	Universiti Malaysia Sarawak
granting_department	Faculty of Resource Science and Technology
publishDate	2012
url	http://ir.unimas.my/id/eprint/14229/1/Hoe%20Yin.pdf
_version_	1783728152065867776

Systematic studies of giamensis and hanneae complexes (Homalomena : Homalomeneae : Araceae)

Similar Items