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Articles by Neelam Sherwani
Total Records ( 2 ) for Neelam Sherwani
  Salim H. Al-Rawahy , Haitham Al-Amri , Abdulrahman Al-Hinai and Neelam Sherwani
  The present study aimed to investigate the sensitivity of an indigenous leguminous plant species of Oman, Prosopis cineraria (ghaff tree), to SO2 pollutant. Plants were exposed to 0, 25, 50, 100 and 150 ppb SO2 for 30 min daily for the period of ten weeks, under light and dark conditions. The formation of marginal necrotic areas on leaflets was seen as the first symptom of SO2 injury in P. cineraria plants. Leaf senescence was highly significant (p<0.01) in plants exposed to SO2 in light conditions and significant (p<0.05) in plants exposed to SO2 in dark conditions compared with control plants. There was significant (p<0.05) decrease in Relative Growth Rate per week in plants exposed to SO2 in both light and dark treatments compared with control plants, but more pronounced reduction in light conditions. Stomatal conductance was significantly (p<0.01) reduced after SO2 exposure in both light and dark treatments. These results became the first record of Oman indigenous plant species showing confirmed injuries as a result of exposure of SO2 concentrations.
  Neelam Sherwani and Sardar Abulfazal Farooq
  Background and Objective: Dipterygium glaucum, a rangeland plant holds high ecological importance in desert conservation by providing a vegetation cover along with other species. This study investigated the impact of biotic and abiotic factors across different habitats, resulting in intraspecific variations in different ecotypes of Dipterygium glaucum. Materials and Methods: Morphological variations in different habitats were assessed using 2 way MANOVA and Principal Component Analysis (PCA) with SPSS 23.0 statistical software. Total phenolics were estimated using Folin and Ciocalteu reagent, chlorophyll content was determined using spectrophotometer method. Antimicrobial activity of the plant extract was assessed against 2 g positive and 2 g negative pathogenic bacterial strains. Results: Variations among populations of three habitats due to adaption to varied environmental conditions were significant. The highland variant showed robust growth compared to coastal and sand dune populations and produced 2 types of flowers white and yellow compared to only yellow flowers in other habitats. Decreased chlorophyll content and increased antimicrobial activity and total phenolics were observed under salt stress. Conclusion: Dipterygium glaucum exhibit phenotypic plasticity across different habitats resulting in intraspecific variations and exist as ecotypes.
 
 
 
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