Cytological Studies in Some West Himalayan Orchids. Tribe: Neottieae. I. Sub-Tribe: Limodorinae

Mehra, P. N.; Kashyap, S. K.

doi:10.1080/00087114.1983.10797642

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…Advancement in microscopy and molecular techniques has led to exhaustive cytogenetic research on orchids in India. Initial efforts focused on karyotyping epiphytic orchids to establish variations in this regard (Mehra & Pal, 1961;Mehra & Bawa, 1970;Mehra & Vij, 1972;Kashyap & Mehra, 1983;Mehra & Kashyap, 1983a,b, 1986. The origin of some orchids in nature was attributed to aneuploidy rather than true polyploidy (Sharma & Chatterji, 1961); however, this hypothesis has been tested on only very few taxa.…”

Section: Cytology and Molecular Biologymentioning

confidence: 99%

A conspectus of orchid studies in India

Adit¹,

Jalal²,

Koul³

et al. 2021

Rheedea

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Orchidaceae represents the largest family of flowering plants in India. The country has come a long way from an era of exploration phase, identification and preparation of inventories of orchids, yet it appears to be an unfinished endeavour. Besides documenting the ethnobotanical knowledge of various orchid species, in vitro tissue regeneration, micropropagation, and cell culture protocols have also been standardised for many orchid species. However, in contrast to the available diversity, ecological and molecular studies of orchids have not been conducted extensively in the country. Although above (pollinators) and below ground (fungal endophytes) mutualists have been recorded for few orchid taxa, the underlying functional mechanisms, which facilitate the processes, are unexplored. The present review offers insights into the major works that have been carried out on orchids in India, and also highlights several areas of potential research that are neglected or understudied. Most importantly, there is a need to broaden the objectives while training orchidologists. It appears that unification of subdisciplines is a priority in orchid biology in general, and conservation in particular.

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Section: Cytology and Molecular Biologymentioning

confidence: 99%

A conspectus of orchid studies in India

Adit¹,

Jalal²,

Koul³

et al. 2021

Rheedea

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“…Feng et Li, 1980and Cymbidium serratum Schlechter, 1919( Aoyama and Tanaka 1988 , Li et al 2002a , 2002b , 2003 , Long et al 2000 ), and reported extensive details on chromosome counts in somatic as well as gametic cells, presence of B-chromosomes and aneuploidy/polyploidy. Conversely, data on Indian cymbidiums mostly restrict to chromosome counts ( Mehra and Yashpal 1961 , Mehra and Bawa 1962 , Chennaveeraiah and Jorapur 1966 , Singh 1984 , Mehra and Kashyap 1983 , 1984a , b , c , d ). Vij and Shekhar (1987) did an enormous investigation on cytogenetical aspects of Indian cymbidiums.…”

Section: Introductionmentioning

confidence: 99%

Comparative karyomorphological study of some Indian Cymbidium Swartz, 1799 (Cymbidieae, Orchidaceae)

Sharma¹,

Kumaria²,

Tandon³

et al. 2012

CCG

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Understanding the genetic resources and diversity is very important for the breeding programs and improvement of several economically important orchids like Cymbidium. Karyomorphological studies have been carried out on seven Cymbidium species, C. aloifolium (Linnaeus, 1753), C. devonianum Paxton,1843, C. elegans Lindley, 1828, C. iridioides D. Don, 1825, C. lowianum Rchb. f.,1877, C. tigrinum Parish ex Hook. f., 1864, and C. tracyanum L. Castle,1890, most of them endangered/threatened in their natural habitat. As reported earlier, the somatic chromosome number (2n = 40) has been observed in all the seven species. Distinct inter-specific variation was recorded in the arm ratio of few homologous pairs in the complements. Symmetrical or almost symmetrical karyotypes were prevalent; however significant asymmetry was reported in C. iridioides and C. tracyanum. The significance of karyotypic variation in speciation of the genus Cymbidium has been discussed. This study provides useful chromosome landmarks and evidence about genome evolution, heteromorphic chromosomes based heterozygosity, basic chromosome number and ploidy level in the genus Cymbidium.

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