Journal of
Medicinal Plants Research

  • Abbreviation: J. Med. Plants Res.
  • Language: English
  • ISSN: 1996-0875
  • DOI: 10.5897/JMPR
  • Start Year: 2007
  • Published Articles: 3753

Full Length Research Paper

Role of leaf epidermis in identification and differentiation of grasses in tribe Chlorideae (Poaceae) from Pakistan

Farooq Ahmad1*, Mansoor Hameed1, Muhammad Ashraf1, Mushtaq Ahmad2, Ameer Khan3, Tahira Nawaz1, Khawaja Shafique Ahmad1 and Muhammad Zafar2
1Department of Botany, University of Agriculture Faisalabad, Pakistan. 2Department of Plant sciences, Faculty of Sciences, Quaid-I-Azam University Islamabad, Pakistan. 3Department of Biological Sciences, University of Sargodha, Sargodha, Pakistan.
Email: [email protected]

  •  Accepted: 16 February 2012
  •  Published: 16 March 2012

Abstract

In the present investigations, leaf epidermal studies of 5 species belonging to 3 genera of tribe Chlorideae (Poaceae) from salt range of Pakistan were carried out. The investigated species were Chloris barbata Sw, Chloris dolicostachya Lag, Cynodon dactylon Pers,Tetrapogon cenchriformis (A.Rich) Clayton and Tetrapogon villosus Desf. The size of stomatal complex, long cells, shape of subsidiary cells, silica bodies are found to be important in differentiation of different taxa. T. villosus is characterized by large cells having maximum length while T. cenchriformis is differentiated from T. villosus and other taxa by large stomatal complex, while smallest stomatal complex is observed in C. dactylon. Bicelled microhairs with hemispherical distal cell are present only in genus Chloris while found absent in C. dactylon (rarely present on adaxial surface) and Tetrapogon species. The presence of microhairs is not a constant character, as in C. dactylon microhairs may be present or absent on the abaxial side. It may be due to habitat or environmental variations. Saddle shaped silica bodies are found in all the species of the tribe that is a characteristic feature of chloridoid type grasses.

 

Key word: Epidermis, Chlorideae, Grasses, Pakistan.