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Articles by Muhammad Akbar Anjum
Total Records ( 7 ) for Muhammad Akbar Anjum
  Muhammad Amjad and Muhammad Akbar Anjum
  Seeds of onion (Allium cepa L.) cv. Ailsa Craig were irradiated at various doses of gamma radiation (0, 10, 20, 40, 80 and 100 krad) and either tested immediately or stored for 24 h at 25oC before testing. Seed viability, final germination percentage, germination speed and seedling growth decreased, while electrical conductivity (EC) of seed leachates, time to complete 50% germination (T50), and percentage of abnormal seedlings increased with increase in radiation dose. After 24 h of storage, percentage of abnormal seedlings increased significantly, while root and overall seedling lengths were decreased. However, seed viability, EC of seed leachates, seed germination percentage, germination speed, T50 and shoot growth were unaffected by the storage. It was concluded that after storage, the damaging effect of irradiation was increased due to the continued effect of radiation.
  Muhammad Amjad , Muhammad Akbar Anjum and Nadeem Akhtar
  Phosphorus (0, 23, 46 or 69 kg P2O5 ha-1) and potassium (0, 50, 100 or 150 kg K2O ha-1) were applied in various combinations to pea crop at the time of seed bed preparation. Nitrogen dose (46 kg N ha-1) was kept constant and applied in two split doses, i.e. half at the time of sowing while the other half was applied before flowering. Seed yield, 1000 seed weight and percentage of large sized seeds (<6.25 mm in dia.) increased significantly with increasing level of P2O5. However, time taken to complete 50% germination and electrical conductivity of seed leachates decreased significantly. Application of K2O to the crop had significant positive influence on seed yield, 1000 seed weight and percentage of large sized seeds up to the dose of 100 kg ha-1. Time taken to complete 50% germination and electrical conductivity of seed leachates were also affected significantly being minimum at the dose of 100 kg K2O ha-1. Application of P2O5 and K2O to the crop had no significant effect on seed germination percentage.
  Muhammad Akbar Anjum and Hakoomat Ali
  Attempts were made to regenerate shoots from calluses of different origin in potato on different media. Shoot initiation from growing tuber calluses on the medium of Iapichino et al.[1] was about 45 days earlier than on the medium of Ahloowalia[2] in both the potato cultivars i.e. Maris Piper and Desiree. Frequency of calluses producing shoots and number of shoots produced per callus were higher on the medium of Iapichino et al.[1] as compared to that of Ahloowalia[2] and in Cv. Maris Piper than the Cv. Desiree. Attempts to regenerate shoots on the medium of Jarret et al.[3] proved unsuccessful. Shoot regeneration from leaf calluses of both Desiree and Maris Piper was achieved on all the three media tested. Shoots were initiated earlier from the calluses subcultured on the medium of Iapichino et al.[1] followed by that of Lam[4], while it took the longest time on the medium of Ahloowalia[2]. The frequency of calluses producing shoots and number of shoots produced per callus were higher on the medium of Iapichino et al.[1] and the lowest on the medium of Ahloowalia[2]. The performance of Cv. Maris Piper was better because regeneration frequency was higher and also more number of shoots per callus was regenerated in this cultivar. Shoot regeneration from calluses derived from suspension-cultured cells of stem origin was 10-15 days earlier from the calluses subcultured on the medium of Bokelmann and Roes[5] than from those subcultured on the medium of Lam[4] in both Desiree and Maris Piper. Frequency of calluses producing shoots was higher in Cv. Maris Piper. The number of shoots regenerated per callus was also higher on the medium of Bokelmann and Roest[5] than on the medium of Lam[4], probably because these media contained different growth regulators in different concentrations.
  Muhammad Akbar Anjum and Hakoomat Ali
  Stem segments (about 1 cm in length and without axillary buds) of four potato genotypes, i.e. two cultivars of Solanum tuberosum, Desiree and Maris Piper and of two wild species, S. commersonii and S. acaule and tubers explants of the two cultivars of S. tuberosum were cultured on three different regeneration media, as developed by Jarret et al.[1], Iapichino et al.[2] and Ahloowalia[3]. The medium of Iapichino et al.[2] took less time to initiate shoots from stem explants, while shoot regeneration from tuber explants was earlier on the medium of Ahloowalia[3]. Among the genotypes, shoot regeneration (when occurred) was in general quicker in Maris Piper. Shoots from the stem explants of S. commersonii were only regenerated on the two media i.e., of Iapichino et al.[2] and Ahloowalia[3], while the explants of S. acaule failed even to survive on either of the media tested. Regeneration frequency (%) and number of shoots regenerated in both, stem and tuber explants, were higher on the medium of Iapichino et al.[2] and in S. tuberosum Cv. Maris Piper.
  Muhammad Azhar Bashir , Hamid Rashid and Muhammad Akbar Anjum
  Nodal segments of six promising strains of jojoba i.e., PKJ-1 to PKJ-6 were cultured in vitro on solidified MS medium supplemented with BA and Kinetin, alone or in combinations at different concentrations to initiate shoot growth. Different growth parameters regarding shoot initiation and growth were recorded during the experimental period of three months. The study revealed that BA (alone) was better than Kinetin (alone) or BA + Kinetin combinations. The lowest concentration of BA (1.25 mg L-1) proved more effective for many shoot parameters and PKJ-3 strain was the most responsive to cytokinins alone or in combination. Some explants also developed callus at the highest level (5.0 mg L-1) of BA (alone) or in combinations of BA with Kinetin. Many explants were vitrified at the highest level (5.0 mg L-1) of Kinetin (alone).
  Muhammad Akbar Anjum and Muhammad Amjad
  The fertilizers were applied @ 50, 75, 100, or 125 kg ha-1 N, 60, 80 or 100 kg ha -1 P2O5 and 60 or 80 kg ha-1 K2O in different combinations to okra cv. Pusa Sawani. Results divulged that seed germination was not affected statistically by the fertilizer application while plant height, number of leaves per plant, number of pods per plant, pod length and green pod yield were affected significantly and were highest at the highest dose of fertilizers.
  Muhammad Akbar Anjum , Muhammad Abid and Farrukh Naved
  As salinity level of the soil was increased (ECe 1.65-8.0 ds m -1) survival percentage, plant height and number of leaves per plant were progressively decreased and toxicity symptoms (tip burning and defoliation) became more pronounced. The performance of Cleopatra mandarin was better at all the ECe levels. Troyer citrange was the most affected rootstock while Red rough lemon, Bitter sweet orange and Volkameriana in the middle.
 
 
 
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