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All Journal REINWARDTIA Reinwardtia
MEEKIONG KALU, MEEKIONG
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Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology

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TWO NEW SPECIES AND ONE NEW GEOGRAPHICAL RECORD FOR SARAWAK, MALAYSIA (CYPERACEAE: MAPANIOIDEAE) ISA, MIRAADILA MOHD.; SHABDIN, ZINNIRAH; KALU, MEEKIONG
REINWARDTIA Vol 15, No 2 (2016): Vol.15 No.2
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v15i2.2948

Abstract

MIRAADILA, M. I., SHABDIN, Z. & MEEKIONG, K. 2016. Two new species and one new geographical record for Sarawak, Malaysia (Cyperaceae: Mapanioideae). Reinwardtia 15(2): 129 – 135. — Mapania hidiriana and M. sembilingensis, two new species from Sarawak, Malaysia are described and illustrated. Mapania hidiriana can be differentiate from M. meditensis by elongated lanceolate inflorescences. Whilst, M. sembilingensisis differ from M. multiflora and M. hispida by the floral and fruit morphologies. In additional, M. spadicea Uittien, a new geographical record for Sarawak is also presented.
PRELIMINARY STUDY OF THE POLLEN MORPHOLOGY OF MALAYSIAN ZINGIBERACEAE (TRIBE ALPINIEAE) AND THE TAXONOMIC RELATIONSHIP Mohamad, Salasiah; Kalu, Meekiong; Sedek, Aimi Syazana
REINWARDTIA Vol 22, No 2 (2023): Volume 22, No 2 (2023): Reinwardtia
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2023.4538

Abstract

The family Zingiberaceae forms an important herbaceous layer in the tropical forests of Malaysia. From a phylogenetic point of 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 palynological data could correlate with the proposed phylogenetic data, using representatives from the Malaysian species. The pollen morphology of 21 species from the tribe Alpinieae was investigated. Parameters including polarity, symmetry, shape, size, apertures, exine ornamentation, size of spine, type of spine apex, spine density, and distance between spine were analysed. The results demonstrated that 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 Alpinia, Conamomum, Meistera, Plagiostachys, Sundamomum, and Sulettaria. Hence, as far as the study is concerned, the main sculpturing is considered useful to generally distinguish the genera in the tribe.
COMPARATIVE MICROMORPHOLOGY LEAF SURFACE OF SELECTED HOYA SPP. (APOCYNACEAE) FROM SARAWAK Ridzuan, Khaleeda; Kalu, Meekiong
REINWARDTIA Vol 22, No 2 (2023): Volume 22, No 2 (2023): Reinwardtia
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2023.4504

Abstract

Traditionally, morphological parameters have been used for several taxonomic and ecological identifications. The morphological characteristics alone would be difficult to distinguish the evidence for species identification. Hence, a study of leaf anatomy was conducted to compare the structural characteristics which focused on the epidermal cells, stomata, and trichomes by using a Compound Microscope and Scanning Electron Microscope (SEM). Four selected species of Hoya from various localities within western of Sarawak were studied: H. caudata, H. coronaria, H. omlorii, and H. verticillata. The results showed stomatal types of Hoya species have stephanocytic stomata, except for two species which have slightly significant differences: H. coronaria has anomocytic stomata and H. omlorii has paracytic stomata. Meanwhile, in terms of the stomatal presence, all species possessed hypostomatic stomata, only H. verticillata has amphistomatic stomata which stomata presence on both sides of the adaxial and abaxial surfaces. Highest stomatal density was recorded in H. omlorii whereas the lowest were recorded in H. coronaria. Stomatal index were calculated and H. caudata has the highest with 12.80% and H. coronaria has the lowest value which is 6.28%. All four species were completely absence of trichomes except for H. coronaria which has simple unicellular non-glandular trichomes. The result indicates that the anatomical characteristics provide additional information and could be a great assist in the distinction within Hoya species.
The application of leaf anatomy identifying species of Orchidantha N.E.Br. (Lowiaceae Ridl.) in Malaysia Yusoff, Nur; Kalu, Meekiong; Siam, Nordahlia
Reinwardtia Vol. 24 No. 1 (2025): Reinwardtia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2025.594

Abstract

YUSOFF, N. S. S. M., KALU, M., & SIAM, N. A. 2025. The application of leaf anatomy identifying species of Orchidantha N.E.Br. (Lowiaceae Ridl.) in Malaysia. Reinwardtia 24(1): 17‒25. — Lowiaceae only consists of one genus, Orchidantha, which with thirty-four species has the lowest number of species among the eight families within order Zingiberales. Recently, Orchidantha has garnered attention for its potential medicinal value in treating fever, cough, chest, and back pain. The species are often only found in a small area. The morphology of the flower of Orchidantha is essential to identification but often the flowers are rarely found. As a result, this study aims to investigate vegetative anatomical characteristics of the petiole, midrib, and lamina, which could be used for species identification independent of availability of flowers; by identifying shapes and special characteristic of labellum, stigma, and viscidium. The results of this study shown a marked difference in shape and depth of the petiole grooves, petiole margin, and the number of vascular systems. In conclusion, the study demonstrates that the anatomical‒petiole grooves, petiole margin and number of vascular systems, are useful for identifying species.
The application of leaf anatomy identifying species of Orchidantha N.E.Br. (Lowiaceae Ridl.) in Malaysia Yusoff, Nur; Kalu, Meekiong; Siam, Nordahlia
Reinwardtia Vol. 24 No. 1 (2025): Reinwardtia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2025.594

Abstract

YUSOFF, N. S. S. M., KALU, M., & SIAM, N. A. 2025. The application of leaf anatomy identifying species of Orchidantha N.E.Br. (Lowiaceae Ridl.) in Malaysia. Reinwardtia 24(1): 17‒25. — Lowiaceae only consists of one genus, Orchidantha, which with thirty-four species has the lowest number of species among the eight families within order Zingiberales. Recently, Orchidantha has garnered attention for its potential medicinal value in treating fever, cough, chest, and back pain. The species are often only found in a small area. The morphology of the flower of Orchidantha is essential to identification but often the flowers are rarely found. As a result, this study aims to investigate vegetative anatomical characteristics of the petiole, midrib, and lamina, which could be used for species identification independent of availability of flowers; by identifying shapes and special characteristic of labellum, stigma, and viscidium. The results of this study shown a marked difference in shape and depth of the petiole grooves, petiole margin, and the number of vascular systems. In conclusion, the study demonstrates that the anatomical‒petiole grooves, petiole margin and number of vascular systems, are useful for identifying species.
Co-Authors MIRAADILA MOHD. ISA, MIRAADILA MOHD. Mohamad, Salasiah Ridzuan, Khaleeda Sedek, Aimi Syazana Siam, Nordahlia Yusoff, Nur ZINNIRAH SHABDIN, ZINNIRAH