Sains Malaysiana 44(1)(2015): 7–15

 

Pollen and Seed Morphology of Rhinacanthus Nees and Hypoestes Sol. ex R. Br. (Acanthaceae) of Yemen

(Morfologi Debunga dan Biji Rhinacanthus Nees dan Hypoestes Sol. ex R. Br. (Acanthaceae) dari Yemen)

 

 

ANISA S. AL-HAKIMI1,2*, HAJA MAIDEEN1 & A. LATIFF1

 

1School of Environmental and Natural Resource Sciences, Faculty of Science and Technology

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia

 

2Taiz University, Biology Department, Faculty of Science, Taiz, Yemen

 

Diserahkan: 12 Julai 2013/Diterima: 23 Mei 2014

 

ABSTRACT

Pollens and seeds of Hypoestes and Rhinacanthus collected from different field localities in Taiz and Soqotra Island, Yemen were investigated by using light and scanning electron microscopes. Pollen grains of Hypoestes were prolate in equatorial view, lobate trigonal to lobate circular in polar view whereas those of Rhinacanthus were subspheroidal and rounded trigonal in polar view. The aperture was tricolporate and exine ornamentation was coarsely reticulate for all species in the two genera. Scanning electron microscopy and morphological observations showed that mature dry seeds of Hypoestes and Rhinacanthus have various sizes and shapes, the surface ornamentations observed were reticulate to cristate, an addition to the tuberculum and papillae. The three Hypoestes species differ in the seed structure which are useful for identification and their high structural diversity provides an important taxonomic value for species differentiation.

 

Keywords: Acanthaceae; Hypoestes species; pollen morphology; Rhinacanthus scoparius; seed morphology

 

ABSTRAK

Debunga dan biji Hypoestes dan Rhinacanthus yang peroleh dari lokaliti lapangan berbeza di Taiz dan Pulau Soqotra, Yemen telah dikaji menggunakan mikroskop cahaya dan mikroskop imbasan elektron. Debunga Hypoestes adalah prolat pada pandangan khatulistiwa, lobat trigon kepada lobat membulat pada pandangan kutub manakala debunga Rhinacanthus adalah subsferoid dan trigon membulat pada pandangan kutub. Apertur adalah trikolporat dan hiasan eksin adalah retikulat kasar untuk semua spesies kedua-dua genus tersebut. Mikroskop imbasan elektron dan pemerhatian morfologi telah menunjukkan biji matang kering Hypoestes dan Rhinacanthus mempunyai berbagai saiz dan bentuk, hiasan permukaan adalah retikulat hingga kristat, disamping tuberkulum dan papila. Ketiga-tiga spesies Hypoestes berbeza pada struktur biji yang berguna bagi pengecaman dan kepelbagaian struktur yang tinggi memberikan nilai taksonomi yang penting untuk membezakan spesies.

 

Kata kunci: Acanthaceae; morfologi debunga; morfologi kulit biji; Rhinacanthus scoparius; spesies Hypoestes

RUJUKAN

 

Alkhulaidi, A.A. 2013. Flora of Yemen. The Sustainable Natural Resource Management Project (SBRMP II) EPA and UNDP, Republic of Yemen.

Barthlott, W. 1981. Epidermal and seed surface characters of plants: Systematic applicability and some evolutionary aspects. Nordic Journal of Botany 1(3): 345-355.

Carine, M.A. & Scotland, R.W. 1998. Pollen morphology of Strobilanthes Blume (Acanthaceae) from southern India and Sri Lanka. Review of Palaeobotany and Palynology 103: 143-165.

Clarke, C.B. 1900. Acanthaceae. In Flora of Tropical Africa, edited by Thiselton-Dyer, W.T. London: Reeves & Sons Pty. Ltd. 5: 1-261.

Chen, I. & Manchester, S.R. 2007. Seed morphology of modern and fossil Ampelocissus (Vitaceae) and implications for phytogeography. American Journal of Botany 94(9): 1543- 1553.

Elisens, J.W., Austen, T., Tomb, S. & Manhattan, K. 1983. Seed morphology in New World Antirrhineae (Scrophulariaceae): Systematic and phylogenetic implication. Plant Systematics and Evolution 142: 23-47.

Erdtman, G. 1952. Pollen Morphology and Plant Taxonomy. Angiosperms. Stockholm: Almqvist  & Wiksells. pp. 30-33.

Furness, C. 1995. Pollen morphology of Acanthopsis Harvey, Acanthus L. and Blepharis Jussieu (Acanthaceae: Acantheae). Review of Palaeobotany and Palynology 92: 253-268.

Furness, C. 1990. Pollen morphology of Crossandra salisburyand Crossandra C.B. Clarke (Acanthaceae). Grana 29: 161-176.

Furness, C. 1989. The pollen morphology of Ecbolium and Megalochlamys (Acanthaceae). Kew Bulletin 44(4): 681-693.

Furness, C. & Grant, M.C. 1996. Pollen morphology of some Ruellia species (Acanthaceae) from Africa and Madagascar. Grana 35(4): 231-239.

Hesse, A., Halbritter, H., Zetter, R., Weber, M., Buchner, R., Andrea, F. & Ulrich, S. 2009. Pollen Terminology: An Illustrated Handbook. Springer: Wien, New York.

Latiff, A. 2012. Seed morphology of Parthenocissus Planch. and Ampelopsis Michx. (Vitaceae) and its taxonomic significance. Sains Malaysiana 41(12): 1503-1508.

Lester, N.R. 1991. Enzyme etching treatment as an aid in the study of seed surface sculpture in Justicia and Ruellia. Botanical Journal of the Linnean Society 105: 285-288.

Mabberley, D.I. 1987. The Plant Book. Cambridge: Cambridge University Press.

Miller, A.G. 2004. Ethnoflora of the Soqotra Archipelago. Edinburgh: Royal Botanic Garden. pp. 400-414.

Perveen, A. & Qaiser, M. 2010. Pollen flora of Pakistan – LXVII: Acanthaceae. Pakistan Journal Bototany Special Issues 42: 175-191.

Scotland, R.W. 1992. Systematics, similarity and Acanthaceae pollen morphology. Botanical Journal Linnean Society 109: 529-541.

Scotland, R.W. & Vollesen, K. 2000. Classification of Acanthaceae. Kew Bulletin 55: 513-580.

Segarra, J.G. & Mateu, I. 2001. Seed morphology of Linaria species from eastern Spain: Identification of species and taxonomic implication. Botanical Journal of the Linnean Society 135: 375-389.

Whiffin, T. & Tomb, S.A. 1972. The systematic significance of seed morphology in the Neotropical capsular-fruited Melastomataceae. American Journal of Botany 59(4): 411- 422.

Wood, J.R. 1997. A Hand Book of the Yemen Flora. Kew: Royal Botanic Garden.

 

 

*Pengarang untuk surat menyurat; email: anna_smh3@yahoo.com

 

 

   

 

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