Male Meiotic Studies in Some Plants of Polypetalae from Dalhousie Hills (Himachal Pradesh)

Kaur, Simerjeet; Singhal, Vijay Kumar; Kumar, Puneet

doi:10.1508/cytologia.75.289

Cited by 11 publications

(5 citation statements)

References 28 publications

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“…Earlier, 2n = 26 was reported for this species . Earlier, 2n = 24 was reported for this species (Kaur & Singhal, 2010). Previous records for this species comprise 2n = 18 (Krasnikov & Schaulo, 1990), 2n = 28 (Pal, 1952), 2n = 36-42 (Heitz, 1926, 2n = 40 (Morton 1993;Albers & Pröbsting, 1998;Javůrková-Jarolímová, 1992), 2n = 42 (Probatova & al., 1996), 2n = 44 (Sidhu & Bir, 1983), and 2n = 40-44 (Tischler, 1937).…”

Section: Leonurusmentioning

confidence: 83%

IAPT/IOPB chromosome data 12

Aguilera

Daviña

Honfi

2011

TAXON

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Section: Leonurusmentioning

confidence: 83%

IAPT/IOPB chromosome data 12

Aguilera

Daviña

Honfi

2011

TAXON

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“…Standard Cytological Indices). The presence of B-chromosomes in the tetraploid cytotype (2n=28) has been reported in the plants collected from Dalhousie hills (Kaur et al 2010). It is thus apparent that the species exhibits a considerable amount of chromosomal diversity and dynamism involving intraspecific polyploidy (based on two basic numbers, x=7 and x=8), abnormal meiotic behavior, and the presence of B-chromosomes.…”

Section: Ranunculus Laetusmentioning

confidence: 85%

Cytological Studies of Some Dicots from the Hills of Mandi District (Himachal Pradesh) in Northwest Indian Himalayas

Singhal¹,

Garg²,

Kumar³

2013

CYTOLOGIA

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Summary Details of male meiotic course and pollen fertility have been investigated in 45 species of dicotyledonous plants from the chromosomally unexplored area of the Mandi district, between the altitudinal ranges of 800 to 3360 m. All the species have been worked out cytologically for the first time from the study area. The meiotic chromosome count of n=9 for Impatiens micranthemum is the first ever chromosome report for the species. A new intraspecific 12x cytotype (n=42) has been reported in Potentilla gerardiana, supplementing the earlier reported cytotypes (2x, 8x). A new cytotype has been reported in Gentiana argentea (n=9), supplementing the earlier Indian report of n=10. Out of a total 45 species, 31 species (68.89%) showed normal meiotic course and high pollen fertility (91-100%), while 14 species (31.11%) depicted various meiotic irregularities and some pollen sterility (4-40%). The phenomenon of cytomixis involving inter-pollen mother cells (PMCs) migration of chromatin material has been reported in 3 species, Clematis grata (n=8), Gentiana aprica (n=10) and Lamium album (n=9). In these species, cytomixis induces various meiotic abnormalities (enucleated, hypo-, hyperploid, tripolar and multipolar PMCs, chromatin stickiness, laggards and chromatin bridges at anaphases and telophases and micronuclei) and consequently some pollen sterility and variable sized pollen grains. Besides, non-synchronous disjunctions of bivalents at anaphases, abnormal spindles, and interbivalent connections during diakinesis/metaphase-I, univalents and multivalents have also been reported in certain cases. The chromosome counts in the remainder of the species substantiate previous counts by other researchers. Mandi district, a gateway to Himachal Pradeshʼs most famous places, including Kullu, Manali, and Lahaul-Spiti, lies between 31°13′50″ and 32°04′30″N latitude and between 76°37′20″ and 77°23′15″E longitude and is situated on the left bank of the river Beas in the foot hills of the Shivalik range. The vegetation of hills around Mandi is varied and the geographical location, climate, and topography of the district have contributed to characteristic vegetation and flora. The forests here support and preserve a variety of flora and fauna. The region is primarily dominated by deciduous trees. It is sub-tropical in the valley and tends to be temperate on the hill tops. The vegetation constituting the forests falls under four main categories: (1) Himalayan Sub-Tropical Pine Forests, (2) Himalayan Moist Temperate Forests, (3) Sub-Alpine Forests, and (4) Alpine Forests. Key wordsFor many decades, the Himalayas have attracted a galaxy of researchers from various disciplines on a global scale. So far, studies undertaken pertain either to floristic diversity or ethnobotany (Chowdhary and

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“…19) at various stages of meiosis and adds a new tetraploid cytotype for the species on a world-wide basis. Earlier the species was reported as having triploid 2n=21 from Belarus (Dmitrieva 2000) along with hexaploids quite common as 2n=42 from India (Kaur et al 2010) and outside India from Belarus (Dmitrieva 2000) and Bulgaria (Baltisberger 2006).…”

Section: Oxalidaceae Oxalis Corniculata Lmentioning

confidence: 99%

“…8) which adds a new diploid cytotype for the species on a global level. The species is already known to be polybasic having diploids and polyploids, namely 2n=20 from Morocco (Galland 1988); 2n=28 from India (Kaur et al 2010); 2n=40, common number from Bulgaria (Petrova and Stanimirova 2003); 2n=42 from Morocco (Galland 1988); 2n=46 (Strid and Anderson 1985) and 2n=60 (Aryavand 1983) from outside of India.…”

Section: Geraniaceae Geranium Lucidum L (=G Camaense C Huang)mentioning

confidence: 99%

Meiotic Studies in Some Polypetalous Species from District Kangra (Himachal Pradesh), India

2012

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Summary At present, meiotic studies have been carried out on a population basis covering 23 species belonging to 13 genera and 10 families of Polypetalae from District Kangra of Himachal Pradesh. New reports in the form of varied chromosome numbers have been marked for the first time on a world-wide basis for 13 species, namely Bupleurum lanceolatum (n=16), Impatiens bicolorand Triumfetta pilosa (n=16). Six species, namely Boenninghausenia albiflora (n=10), Circaea alpina (n=11), E. palustre (n=18), Rosa brunonii (n=7) and R. indica (n=7), have been cytologically worked out for the first time from India, along with additional cytotypes for 3 Indian materials, namely Abutilon indicum (n=7), E. cylindricum (n=9) and Oxalis corniculata (n=7). Amongst these species, the course of meiosis varies from normal to abnormal in different populations of Malva neglecta, Rosa brunonii and R. indica whereas all the studied accessions of Bupleurum lanceolatum, Geum roylei, Impatiens sulcata, Oxalis corniculata and Rosa macrophylla have been found to be abnormal. The meiotic abnormalities include various phenomenon such as cytomixis, chromatin stickiness, unoriented bivalents, laggards, chromatin bridges and multipolarity at different stages of meiosis along with abnormal microsprogenesis ultimately leading to reduced pollen fertility and formation of heterogenous sized pollen grains.

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Male Meiotic Studies in Some Plants of Polypetalae from Dalhousie Hills (Himachal Pradesh)

Cited by 11 publications

References 28 publications

IAPT/IOPB chromosome data 12

IAPT/IOPB chromosome data 12

Cytological Studies of Some Dicots from the Hills of Mandi District (Himachal Pradesh) in Northwest Indian Himalayas

Meiotic Studies in Some Polypetalous Species from District Kangra (Himachal Pradesh), India

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