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. 2011 Jan;18(1):87-92.
doi: 10.1016/j.sjbs.2010.10.003. Epub 2010 Oct 16.

Taxonomic significance of trichomes micromorphology in cucurbits

Mohammad Ajmal Ali  1 , Fahad M A Al-Hemaid
Affiliations

Taxonomic significance of trichomes micromorphology in cucurbits

Mohammad Ajmal Ali et al. Saudi J Biol Sci. 2011 Jan.

Abstract

Studies on trichomes micromorphology using Scanning Electron Microscope (SEM) were undertaken in 23 species with one variety under 13 genera of the family Cucurbitaceae (viz., Benincasa hispida (Thunb.) Cogn., Citrullus lanatus (Thunb.) Matsum. & Nakai, Cucumis melo var. agrestis Naudin, Cucumis sativus L., Diplocyclos palmatus (L.) C. Jeffrey, Edgaria dargeelingensis C.B. Clarke, Gynostemma burmanicum King ex Chakr., Gynostemma pentaphyllum (Thunb.) Makino, Gynostemma pubescens (Gagnep.) C.Y. Wu, Hemsleya dipterygia Kuang & A.M. Lu, Lagenaria siceraria (Molina) Standl., Luffa acutangula (L.) Roxb., Luffa cylindrica M. Roem., Luffa echinata Roxb., Melothria heterophylla (Lour.) Cogn., Melothria leucocarpa (Blume) Cogn., Melothria maderspatana (L.) Cogn., Sechium edule (Jacq.) Sw., Thladiantha cordifolia (Blume) Cogn., Trichosanthes cucumerina L., T. cucumerina var. anguina (L.) Haines, Trichosanthes dioica Roxb., Trichosanthes lepiniana (Naudin) Cogn. and T. tricuspidata Lour.). The trichomes in the family Cucurbitaceae vary from unicellular to multicellular, conical to elongated, smooth to ridges, with or without flattened disk at base and cyctolithic appendages, thin to thick walled, curved at apices to blunt. Trichomes micromorphology in the family Cucurbitaceae was found significant taxonomically.

Keywords: Cucurbitaceae; SEM; Trichomes.

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Figures

Figure 1
Figure 1
Trichomes morphology in Cucurbitaceae: (A) Benincasa hispida ×300, (B) Citrullus lanatus ×300, (C) Cucumis melo var. agrestis ×300, (D) C. sativus ×300, (E) Diplocyclos palmatus ×50, (F) Edgaria dargeelingensis ×300, (G) Gynostemma burmanicum ×300, and (H) G. pentaphyllum ×300.
Figure 2
Figure 2
Trichomes morphology in Cucurbitaceae: (A) Gynostemma pubescens ×300, (B) Hemsleya diptrygia ×300, (C) Lageneria siceraria ×300, (D) Luffa acutangula ×300, (E) L. cylindrica ×300, (F) L. echinata ×300, (G) Melothria heterophylla ×300, and (H) M. leucocarpa ×300.
Figure 3
Figure 3
Trichomes morphology in Cucurbitaceae: (A) Melothria maderspatana ×300, (B) Sechium edulae, (C) Thladiantha cordifolia ×300, (D) Trichosanthes cucumerina ×300, (E) T. cucumerina var. anguina ×300, (F) T. dioica ×300, (G) T. lepiniana ×300, and (H) T. tricuspidata ×300.
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References

    1. Ali, M.A., 2006. Taxonomic studies on the family Cucurbitaeae of eastern Bihar. Ph.D. Thesis. Tilka Manjhi Bhagalpur University, Bhagalpur, Bihar, India.
    1. Ali M.A., Pandey A.K. Cucurbitaceae of Bihar: diversity and conservation. In: Trivedi P.C., editor. Global Biodiversity Status and Conservation. Pointer Publisher; Jaipur, Rajasthan, India: 2006. pp. 257–263.
    1. Ali M.A., Pandey A.K. PSRC Publication; India: 2007. Cucurbitaceae of Eastern Bihar.
    1. Ali M.A., Pandey A.K., Lee J. Relationships among subfamily Cucurbitoideae (family Cucurbitaceae) from India inferred from ITS sequences of nrDNA. Phytomorphology. 2009;59(3 and 4):127–140.
    1. Banerjee A., Sinhababu A., Kar R.K., Mandal S. Micromorphological studies of four fuel wood yielding tropical leguminous plant. Pak. J. Biol. Sci. 2004;7(1):100–104.

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