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Articles by G.H. Dar
Total Records ( 5 ) for G.H. Dar
  Anzar A. Khuroo , Akhtar H. Malik , A.R. Dar , G.H. Dar and Z.S. Khan
  The documentation of biodiversity and its traditional use(s) by the ethnic communities have assumed priority due to the rampant loss of biodiversity, the looming threats of biopiracy and the increasing patent wars on bio-resources. In view of this, the present paper describes in detail the ethno-veterinary medicinal uses of some angiosperm plant species by the Gujar tribe of the Kashmir Himalaya; with the sole objective of documentation of this secret treasure-trove of valuable ethno-botanic knowledge. In the present investigation, each plant species has been provided with the scientific name, local name, growth form, altitudinal range and present status of occurrence; followed by part(s) used, mode of preparation, method of use and the dosage.
  A.R. Dar , Zafar Reshi , G.H. Dar and Lubna Andleeb
  Five populations of Aquilegia nivalis were regularly surveyed during 2004-2006 for the study of phenological events, population size, recruitment and mortality of its individuals besides reproductive ecology. The study revealed that its perennating organs start sprouting in the first week of June, followed by flowering of individuals in the 3rd week of June and seed formation in the last week of September. Due to the herkogamous and dichogamous nature of its flowers, A. nivalis is an out-breeder. The number of individuals in its populations ranges from 2.87 ind./m2±0.12 to 10.28 ind./m2±0.57. Due to small size of its populations, very few (0.37 ind/m2±0.15 to 2.86 ind./m2±0.14) individuals reach the reproductive stage. Furthermore, 10.66%±4.19 to 18.72%±10.31 of individuals are damaged by herbivores in various populations. These factors limit the availability of compatible mates in the populations and contribute to low-insect visitation frequency (0.03±0.00 to 0.14±0.02; n=18), low pollen viability (46.50±1.93; n=3) and consequentially very low fruit (0%±0 to 70%±15.28) and seed set (0%±0 to 60.8%±15.85). All these factors, in conjunction with hostile habitat conditions and enhanced anthropogenic pressures, contribute to the present threat status of this endemic species.
  Neelofar Jabeen , A.S. Shawl , G.H. Dar , Arif Jan and Phalesteen Sultan
  A rapid in vitro regeneration protocol for induction of multiple shoots from nodal segments of Inula racemosa Hook.f. was developed. Leaf and nodal segments were inoculated on MS medium containing different concentrations of Benzylaminopurine (BAP) either alone or in combination with Naphthalene Acetic Acid (NAA) or Indole Butyric Acid (IBA) growth hormones. MS medium supplemented with BAP (0.25 mg L–1) induced maximum number of shoots (20.7±0.8). The shoots were rooted on half strength of MS medium either alone or supplemented with (IBA) Indole butyric acid (1.0 mg L–1). Direct rooting from leaves has also been developed from cultured plants. In vitro raised plantlets were acclimatized in green house and successfully transplanted to the field with a survival of 80%.
  A.R. Dar , Zafar Reshi and G.H. Dar
  Seven spatially separate populations were studied in an attempt to identify and understand the bottlenecks that are responsible for the restricted occurrence and limited size of the existing populations of an endemic species, Meconopsis latifolia, in the Kashmir Himalaya, which is at the brink of extinction. Of the seven populations, only a few individuals in three populations flowered and produced seeds. Vegetative individuals predominated the populations. This skewed distribution of vegetative and reproductive individuals within populations was largely due to herbivory by rodents and cattle that prevented flowering. The surveyed populations showed variability in plant height (38.82±4.39 to 95.37±6.73 cm, p = 0.0001), rhizome length (11.8±0.66 to 27.56±3.74 cm, p = 0.007), number and dimensions of basal and upper leaves, the number of reproductive individuals (0.15 to 2.88 ind. m-2, p = 0.0001) and flower number (16.6±0.67 to 29.12±2.708, p = 0.0001). Breeding experiments confirmed the out-breeding nature of the species and only one insect species foraged and pollinated its flowers. The reproductive output, though relatively more in high elevational populations, was severely constrained by herbivory and pre-dispersal seed predation. Reduced population size, herbivory, reduced number of reproductive individuals, pre-dispersal seed predation and highly-specialized habitat requirements are the major restrictive factors responsible for the present critically endangered threatened status of this species.
  M.A. Ahangar , G.H. Dar , Z.A. Bhat and N.R. Sofi
  This study was conducted to find out the cause of root rot disease of blue pine (Pinus wallichiana) seedlings which is an important limiting factor in its successful production right from the nursery raising. The pathogens associated with the disease were isolated, morphologically characterised and identified as Fusarium oxysporum f.sp. pini (Schlecht.) Synd. and Hans., Rhizoctonia solani Kuhn and Macrophomina phaseolina (Tassi) Goid. F. oxysporum was the most abundant pathogenic fungus in diseased roots of blue pine seedlings with isolation frequency of 38.6%, whereas R. solani and M. phaseolina showed isolation frequencies of 11.0 and 3.3%, respectively. All the three fungi proved pathogenic and caused characteristic root rot symptoms when inoculated separately. Root rot disease of Pinus wallichiana seedlings was prevalent in all the three districts of Kashmir valley surveyed, during 2008 and 2009.
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