Effects of Paclobutrazol on Dry Matter Accumulation and Grain Filling of Castor Bean
Chengyu Song,
Guanglong Zhu,
Xiurong Jiao,
Guisheng Zhou
Issue:
Volume 4, Issue 3, September 2018
Pages:
83-90
Received:
20 August 2018
Accepted:
14 September 2018
Published:
17 October 2018
Abstract: Castor bean (Ricinus communis L.) as a bioenergy crop, received more and more attention in recent years. However, the yield of castor bean seeds is affected by adverse environmental conditions. The objective of this study was to assess the effects of exogenous application of Paclobutrazol (PBZ) on castor bean growth, yield and physiology as well as on its response to environmental stress during grain filling. In the present field study, three PBZ concentrations [0 g•ha-1 (control), 75 g•ha-1 and 150 g•ha-1] were applied twice, once at grain filling of main panicle and once at grain filling of branched panicle. The growth and physiological responses of castor bean were measured four times throughout flowering and seed formation stages [1-early initiation stage of main inflorescence (E), 2- anthesis of main inflorescence (A), 3-maturity of main panicle (M) and 4-maturity of branched panicle (B)]. Plant growth was not affected by the application of PBZ, but leaves remained later on the plant when 75 g•ha-1 of PBZ was applied. With the application of PBZ, the concentration of starch was higher in panicles than in leaves and stems. Also, PBZ application increased the number of seeds per plant without affecting seed size and weight. These results suggest that exogenous application of PBZ can enhance sink strength of panicles and improve seed yield and that application of PBZ at flower initiation can alter photosynthetic partitioning in favor to seed production. On the other hand, PBZ had no effect on antioxidant enzyme activity in the seeds in response to stress.
Abstract: Castor bean (Ricinus communis L.) as a bioenergy crop, received more and more attention in recent years. However, the yield of castor bean seeds is affected by adverse environmental conditions. The objective of this study was to assess the effects of exogenous application of Paclobutrazol (PBZ) on castor bean growth, yield and physiology as well as...
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Improve the Flash Flood Early Warning System in the North-Eastern Parts of Bangladesh
Anik Pal,
Mohammad Jakariya,
Mohammad Abdur Rahman,
Munjira Yeasmin
Issue:
Volume 4, Issue 3, September 2018
Pages:
91-97
Received:
29 August 2018
Accepted:
18 September 2018
Published:
27 October 2018
Abstract: This study investigates to improve the flash flood early warning system in the north-eastern parts of Bangladesh. Flash Flood is a major problem and is increasing day-by-day in the north-eastern parts of Bangladesh. The huge amount of economic and life losses every year due to these floods demands for an up to date warning system which will able to notify general peoples of the affected areas. Primary data is collected from the study (Kamalganj, Maulovibazar) which are mostly vulnerable during the flash flood season. Secondary data is collected by performing reconnaissance survey and Focus Group Discussion (FGD). From the survey about 67% respondents complained that their personal property damage by flash flood, more than 87% people claimed about the life loss of human and other animals. About 100% people claimed that there has no any warning system in this region as well as 79% said about negative to awareness program and at least 83% respondents demanded about the warning system technology development. Most of the people in this region use mobile phone which can be used as an effective tool by integrating them in a flash flood early warning system. So, this study developed a warning device which is able to send warning through SMS when the water exceeds the normal level measured by a sensor. There was implemented the demo device to identity its efficiency. The device was found to be working accordingly. Some feedbacks were collected from respondents and professionals on the device and their thoughts on implementing this kind of device in their respective areas. The results were positive and research team observed positive response from the respondents as well. This result suggests future research is needed to develop advanced warning system that is able to provide warnings to the affected people covering more areas affected with flash flood.
Abstract: This study investigates to improve the flash flood early warning system in the north-eastern parts of Bangladesh. Flash Flood is a major problem and is increasing day-by-day in the north-eastern parts of Bangladesh. The huge amount of economic and life losses every year due to these floods demands for an up to date warning system which will able to...
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