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Vegetos

Journal: Vegetos- An International Journal of Plant Research

Article DOI :
Year :2012, Volume : 25, Issue :1
First page : (274) Last page : (277)
Print ISSN : 0970-4078. Online ISSN : 2229-4473.


RESEARCH ARTICLE
A SOCIETY FOR PLANT RESEARCH PUBLICATION

Obligate Apomixis in Zeuxine strateumatica (Lindl.) Schltr. (Orchidaceae)

Kant Ravi1,,*, Verma Jagdeep

Department of Botany, Panjab University, Chandigarh – 160014, INDIA
1Shoolini Institute of Life Sciences and Business Management, Solan, H. P. – 173212, INDIA

*Corresponding author email: ravi.puchd@gmail.com

Mode of embryo formation was studied in a population of Zeuxine strateumatica (Lindl.) Schltr. growing naturally at Dhanas (340 m), Chandigarh, India. The gynoecium was tricarpellary and syncarpous. The unilocular ovary possess 3 parietal placentae which developed ovule primordia. The hypodermal cell of ovule primordium got differentiated into an archesporial cell. Megaspore mother cell either developed directly into embryo through mitosis or got degenerated. In most of the ovules, 1–3 nucellar cells function as embryonal initial which subsequently form mature embryo. Presently studied population exhibited obligate apomixis, a type of asexual reproduction observed occasionally in some angiosperms.




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