African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 718

Full Length Research Paper

Petiole anatomy of some species of Asteraceae in southwest Nigeria

AKINNUBI Funmilola Mabel*, AKINLOYE Akinwumi Johnson and OLADIPO Olaniran Temitope
Department of Botany, Obafemi Awolowo University, Ile-Ife, Osun state, Nigeria.
Email: [email protected]

  •  Accepted: 21 November 2013
  •  Published: 31 December 2013

Abstract

Petiole anatomy of 12 species of Asteraceae around Ile-Ife in South-Western Nigeria was described. Transverse section of the petiole (median) was cut at 20 µ using Reichert Sledge Microtome. The specimens were stained in 1% aqueous solution of Safranin O for 5 min, washed in three changes of water to remove excess stain and counterstained in 1% solution of Alcian blue for 5 min, and cleared in xylene. The section was mounted in DPX. The distinguishing characteristics of taxonomic value include, shapes of the petioles, variation in the number, arrangement and shapes of vascular bundles, types of trichomes.

Key words: Asteraceae, petiole, anatomy, taxonomic, trichomes.