Studies on the chromosome numbers of ferns from Kolli Hills, Eastern Ghats, Tamil Nadu, India

Abstract

The chromosomal observations were carried out on 66 taxa collected from Kolli Hills belongs to 38 genera and 20 families. Sixty two ferns were studied cytologically for the first time in this study area. The present study has revealed the presence of 32 sexual diploids, 20 sexual tetraploids, 2 apogamous tetraploids, 9 sexual octoploids, 2 apogamous triploids and one 12-ploid sexual species. The sexuality of polyploids has also been calculated. The maximum number of chromosomes (n=171) were observed in Adiantum hispidulum while a minimum number of chromosomes (n=30) were in Adiantum latifolium, Cheilanthes tenuifolia and Pellaea boivinii. About the 20 genera were observed to be with more than one base number and remaining 18 genera with a single base number. ARTICLE HISTORY

Taxonomy and spore morphology of selected taxa of Cheilanthoideae and Pteridoideae (Pteridaceae) from Pakistan

“…The spore morphology of Cheilanthoideae and Pteridoideae (Pteridaceae) species observed under SEM represents variations in size, shape, aperture and surface ornamentation, as described in many previous studies (Giacosa, Morbelli, & Giudice, 2004; Makgomol, 2006; Nayar & Devi, 1966, 1967; Vaganov, Gureyeva, Shmakov, Kuznetsov, & Romanets, 2018a, 2018b). Their spores are usually trilete and triangular in proximal and distal view, spheroidal, ellipsoidal, hemicircular in equatorial view; surface is often cristate, granulose, reticulate, perforate and tuberculate (Irfan, Jan, Jan, & Murad, 2021b; Vijayakanth & Sathish, 2016).…”

Review on the genus Tectaria Cav. from India

“…Vijaykant and Sathish (85)(86) studied cytology of some pteridophytes from Kolli Hills. Recently, Vijaykant et al (86) studied the cytology of ferns (including T. gemmifera and T. wightii) from Kolli Hills, Eastern Ghats, Tamil Nadu, India.…”

Taxonomic importance of spore morphology of selected taxa of Asplenium (Aspleniaceae) from Pakistan

“…Apart from the above mentioned some other researchers also contributed to document about the anatomy, cytology, phylogeny, and taxonomy of the various taxa of Asplenium viz. Bercu (2005); Bir (1962); Chaerle and Viane (2004); Chandra (1979); Chang et al (2018); Cheng and Murakami (1998); Deng and Wang (2010); Dyer et al (2013); Khare and Shankar (1989); Mehra and Bir (1957, 1960); Mitsuta et al (1980); Pinter et al (2002); Reichstein (1981); Schneider (1997); Umikalsom (1992); Vijayakanth et al (2018); Wetzel et al (2017); Yadav et al (2002); Yamada et al (2016) and Xu et al (2020).…”