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Articles by Mohammed Saifuddin
Total Records ( 4 ) for Mohammed Saifuddin
  Mohammed Saifuddin , A.B.M. Sharif Hossain , Normaniza Osman and K.M. Moneruzzaman
  A field experiment was conducted to assess the effect of gibberellic acid (GA3 100 and 150 ppm), phloemic stress and combination of 100 ppm GA3 and phloemic stress on Bougainvillea bract blooming, expansion, development and bract longevity under exposed sun light condition (400-700 ╬╝Em-2 sec-1). A seven-years-old Bougainvillea plant was used in this experiment. Fifteen selected brunches were applied with 100, 150 ppm GA3, phloemic stress, 100 ppm GA3+phloemic stress and water control. The results showed that 100 ppm GA3 increased the length of petiole, bract size and shape by 40%. Bract blooming was three days earlier in 100 ppm GA3 treated branches and 4 days earlier in 150 ppm GA3 than in water control. Bract longevity (required days from bract initiation to abscission) was higher for 4 in phloemic stress and for 2 days in 100 ppm GA3+phloemic stress than in water control. However, bract longevity was shorter in 100 and 150 ppm GA3 than in control. The number of bracts per branch was higher in 100 ppm GA3+phloemic stress and phloemic stress than the other treatments. Petal size and petiole length were the highest in 100 ppm GA3. But there were no significant changes in bract size and color development in phloemic stress. Maximum chlorophyll fluorescence was observed in phloemic stress. Quantum yield (Fv/Fm) was higher in phloemic stress and 100 ppm GA3+phloemic stress than in other treatments. The findings suggested that gibberellic acid played an important role to induce rapid bract blooming and expansion whereas, phloemic stress increased total number of bract and longevity.
  Mohammed Saifuddin , A.B.M.S. Hossain , O. Normaniza , A. Nasrulhaq Boyce and K.M. Moneruzzaman
  In this study, experiments were conducted to investigate the effects of NAA and GA3 on bract longevity under exposed sunlight conditions and six months of observation. Bougainvillea bracts at four different stages of bract development were sprayed with gibberellic acid (100 ppm GA3), naphthaleneacetic acid (50, 100 and 150 ppm NAA) and mixed GA3 (100 ppm) and NAA concentrations (50,100 and 150 ppm). Bract longevity was found to be almost 10 days longer in NAA (50, 100 and 150 ppm) than in the water control and in GA3 (100 ppm) treatment. In the case of GA3 and NAA (50, 100 and 150 ppm) treatment on alternative days, bract longevity was 30 days longer when compared with the water control. It was also observed that a delay in discoloration and stomata conductance were increased in the presence of GA3 with low a concentration of NAA. The results indicated that the prolonging effect of low concentrations of NAA at the initial budding stages was more effective compared with its application at other stages of development and at higher concentrations. Maximum bract weight and shoot length were observed in the GA3 and GA3 plus NAA treated flowers.
  Mohammed Saifuddin , Mohammad Moneruzzaman Khandaker , Md. Sarwar Jahan , Nashriyah Binti Mat and A.B.M. Sharif Hossain
  Growth regulator is an important factor to enlarge the flower size in the floriculture industry. Flower growers have a lot of interest in making flower enlargement and shorten longevity to harvest flower earlier and to make it marketable soon. Gibberellic Acid (GA3) and aluminium sulphate Al2(SO4)3 play significant roles in flower enlargement and development. Hibiscus sp. was used in this experiment. The branches were dripped with the respective chemical [GA3 and Al2(SO4)3 100ppm] at 3 days intervals for 3 weeks. It had been shown that the 100 ppm GA3 played major role in developing a bigger size of the flower, production of more leaves, shorter longevity of flower, quicker bloom and greater size and weight of the flower as compared to the Al2(SO4)3 and control. Chlorophyll content (represented by SPAD value) and fluorescence were higher in GA3 treated branch than in aluminium sulphate treated branch and control. The quantum yield (Fv/Fm) was maximal in GA3 treated branch. The aluminium sulphate treated branch also showed the similar results but the longevity of the flower had the longer duration in aluminium sulphate treated branch than in GA3 but shorter than control. The results showed that these two chemicals [GA3 and Al2(SO4)3 100ppm] using dripping technique instead of spray were effective for the enlargement of flower size and shorten the flower longevity with less chemical cost and quantity of chemicals without hazarding the environment instead of spray . In addition, it improved the weight and increased the blooming rate and could be acceptable to the flower growers easily and could be harvested for commercial purposes earlier.
  Mohammed Saifuddin , Mohammad Moneruzzaman Khandaker , Md. Sarwar Jahan , Nashriyah Binti Mat and A.B.M. Sharif Hossain
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