The Cytotaxonomy of Some Members of the Cheilanthes farinosa Complex in Africa and India

Manton, I.; Roy, S. K.; Jarrett, F. M.

doi:10.2307/4115801

Cited by 13 publications

(5 citation statements)

References 2 publications

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“…For the second time a cytogenetic study within a group of related taxa has shown Africa to be mainly if not entirely populated by polyploids whereas India is mainly though not entirely occupied by diploids. Our present results bring out this feature clearly with respect to the Adiantum incisum complex in India and Africa, but very similar results had previously been reached with respect to the CheiZanthes jurinosa complex (Manton, Roy & Jarrett, 1966) in the two continents. Cheilanthes and Adiantum are however not closely related and therefore characters of this kind which they may share must be conditioned in some way by the past history of the floras of which they form a part.…”

Section: Discussionsupporting

confidence: 91%

Cytotaxonomic studies in the Adiantum caudatum complex of Africa and Asia. II. Autoploidy and alloploidy in African representatives of A. incisum

Manton

Sinha

Vida

1970

Botanical Journal of the Linnean Society

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A hybridization programme involving populations attributable to A. incisum Forsk. sens. lat. from several parts of Africa has shown that, while all those sampled are tetraploid (unlike the Indian equivalents which are predominantly diploid), they are not all genetically identical. One ecologically differentiated allotetraploid has been collected from Tanganyika (Mt. Kilimanjaro) and the pairing behaviour of its chromosomes analysed in a range of crosses involving oriental and African cytotypes. All the other African samples investigated appear to be of autoploid origin. This is the first demonstration of autoploid derivation in the genus Adiantum.

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Section: Discussionsupporting

confidence: 91%

Cytotaxonomic studies in the Adiantum caudatum complex of Africa and Asia. II. Autoploidy and alloploidy in African representatives of A. incisum

Manton

Sinha

Vida

1970

Botanical Journal of the Linnean Society

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“…The union of such an unreduced gamete with a reduced gamete from a sexual diploid would simply result in additional higher ploidy asexual lineages, not new sexual diploids (see Gastony and Windham 1989). Although attempts at standard reductive meiosis are observed in asexual cheilanthoid ferns, these produce abortive spores due to chromosome pairing difficulties (Manton et al 1966; Walker 1979). Without gene flow, convergence would have to be invoked, an event that is extremely implausible at this time depth.…”

Section: Methodsmentioning

confidence: 99%

Do Asexual Polyploid Lineages Lead Short Evolutionary Lives? A Case Study From the Fern Genus Astrolepis

2011

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“…Adiantum , Actiniopteris , Cheilanthes , Notholaena and Pellaea , were earlier known for their DT abilities (Proctor and Pence 2002), while Aleuritopteris is a new addition. Aleuritopteris bicolor , a tropical cheilanthoid fern the name of which has been misapplied for Cheilanthes farinosa in most Indian literature and floras (Manton et al 1966) showed 10.6% of RWC value (Fig. 4D–F).…”

Section: Discussionmentioning

confidence: 99%

Desiccation‐tolerant vascular plants from Western Ghats, India: review, updated checklist, future prospects and new insights

Vijayan

Kulkarni

Shigwan

et al. 2023

Nordic Journal of Botany

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Desiccation‐tolerant vascular (DT) plants are predominant occupants of rock outcrops in tropical regions. Though rock outcrops are common landscapes in the Western Ghats (WG), a biodiversity hotspot in India, knowledge of DT plants in the region is poor. This study provides an overview of Indian DT vascular plants, emphasizing the WG, and includes an inventory of species with their habitat preferences. Outcrop species were scrutinized for their DT properties by seasonal field observations, followed by relative water content estimation protocols. The inventory revealed 62 DT species, many more than the earlier known nine species. Nine genera of DT plants are reported as new also in a global perspective, and Tripogon capillatus represent the first record of an epiphytic DT angiosperm. We also provide the first field observation‐based proof of DT properties of the gesneriad Corallodiscus lanuginosus. Of the 62 species, 16 are Indian endemic, and 12 are exclusive to Western Ghat outcrops, highlighting WG's importance as a global DT hotspot. In addition to rock outcrops, partially shaded sites in forests are crucial habitats for DT species. This pioneering inventory addresses India's need for more knowledge on DT plants and opens new research avenues.

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The Cytotaxonomy of Some Members of the Cheilanthes farinosa Complex in Africa and India

Cited by 13 publications

References 2 publications

Cytotaxonomic studies in the Adiantum caudatum complex of Africa and Asia. II. Autoploidy and alloploidy in African representatives of A. incisum

Cytotaxonomic studies in the Adiantum caudatum complex of Africa and Asia. II. Autoploidy and alloploidy in African representatives of A. incisum

Do Asexual Polyploid Lineages Lead Short Evolutionary Lives? A Case Study From the Fern Genus Astrolepis

Desiccation‐tolerant vascular plants from Western Ghats, India: review, updated checklist, future prospects and new insights

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