Diversity and Systematics Study of Tribe Alpinieae (Zingiberaceae) in Sarawak

Family Zingiberaceae formed an important herbaceous layer in the tropical forests of Borneo. From the phylogenetic view, certain genera of the problematic tribe Alpinieae are non-monophyletic and in need of more taxonomic evidence to support the classification. This study demonstrates how the morpho...

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Main Author: Salasiah, Mohamad
Format: Thesis
Language:English
Published: 2021
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Online Access:http://ir.unimas.my/id/eprint/36457/1/Salasiah.pdf
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institution Universiti Malaysia Sarawak
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language English
topic QH301 Biology
QK Botany
spellingShingle QH301 Biology
QK Botany
Salasiah, Mohamad
Diversity and Systematics Study of Tribe Alpinieae (Zingiberaceae) in Sarawak
description Family Zingiberaceae formed an important herbaceous layer in the tropical forests of Borneo. From the phylogenetic view, certain genera of the problematic tribe Alpinieae are non-monophyletic and in need of more taxonomic evidence to support the classification. This study demonstrates how the morphological, anatomical, palynological, and phytochemical evidences, correlated to the proposed phylogenetic data, taking representatives from the Bornean species. Furthermore, the rapid deforestation of the forests in Sarawak has also urged the assessment of the distribution and diversity of the species. Overall, 45 taxa from 11 genera were identified, including a newly described species and variety, Sundamomum corrugatum, and Plagiostachys strobilifera var. conica, respectively. Comprehensive morphologies of the fruit, anther crest, anther dehiscent, stigma, ostiole, labellum, lateral staminodes, and leaf sheaths were important in delimiting the species and genera in the tribe. The studied species were conveniently divided into two major groups based on the exine sculpturing of the spheroidal pollens, either psilate as in Etlingera and Hornstedtia, or echinate as in the remaining genera. Likewise, vegetative anatomical assessment unveiled informative characteristics in distinguishing the species. Phytochemical study of the rhizomes essential oils further revealed the major and specific components that characterised each studied cluster. Additionally, Lambir Hills National Park recorded the most diverse and stable area for Alpinieae species that could function as an important in-situ conservation area in Sarawak.
format Thesis
qualification_name Doctor of Philosophy (PhD.)
qualification_level Doctorate
author Salasiah, Mohamad
author_facet Salasiah, Mohamad
author_sort Salasiah, Mohamad
title Diversity and Systematics Study of Tribe Alpinieae (Zingiberaceae) in Sarawak
title_short Diversity and Systematics Study of Tribe Alpinieae (Zingiberaceae) in Sarawak
title_full Diversity and Systematics Study of Tribe Alpinieae (Zingiberaceae) in Sarawak
title_fullStr Diversity and Systematics Study of Tribe Alpinieae (Zingiberaceae) in Sarawak
title_full_unstemmed Diversity and Systematics Study of Tribe Alpinieae (Zingiberaceae) in Sarawak
title_sort diversity and systematics study of tribe alpinieae (zingiberaceae) in sarawak
granting_institution Universiti Malaysia Sarawak
granting_department Faculty of Resource Science and Technology
publishDate 2021
url http://ir.unimas.my/id/eprint/36457/1/Salasiah.pdf
_version_ 1783728472958435328
spelling my-unimas-ir.364572023-07-05T01:56:53Z Diversity and Systematics Study of Tribe Alpinieae (Zingiberaceae) in Sarawak 2021-10-22 Salasiah, Mohamad QH301 Biology QK Botany Family Zingiberaceae formed an important herbaceous layer in the tropical forests of Borneo. From the phylogenetic view, certain genera of the problematic tribe Alpinieae are non-monophyletic and in need of more taxonomic evidence to support the classification. This study demonstrates how the morphological, anatomical, palynological, and phytochemical evidences, correlated to the proposed phylogenetic data, taking representatives from the Bornean species. Furthermore, the rapid deforestation of the forests in Sarawak has also urged the assessment of the distribution and diversity of the species. Overall, 45 taxa from 11 genera were identified, including a newly described species and variety, Sundamomum corrugatum, and Plagiostachys strobilifera var. conica, respectively. Comprehensive morphologies of the fruit, anther crest, anther dehiscent, stigma, ostiole, labellum, lateral staminodes, and leaf sheaths were important in delimiting the species and genera in the tribe. The studied species were conveniently divided into two major groups based on the exine sculpturing of the spheroidal pollens, either psilate as in Etlingera and Hornstedtia, or echinate as in the remaining genera. Likewise, vegetative anatomical assessment unveiled informative characteristics in distinguishing the species. Phytochemical study of the rhizomes essential oils further revealed the major and specific components that characterised each studied cluster. Additionally, Lambir Hills National Park recorded the most diverse and stable area for Alpinieae species that could function as an important in-situ conservation area in Sarawak. 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