Morphological and physiological changes of banana (Musa acuminata cv. Berangan) to Brassinolide at nursery stage
2018
Hawa ZE Jaafar | Siti Zaharah Sakimin | Ali Baghdadi | Md Aiman Takrim Zakaria | Mohd Fauzi Ramlan | Siti Norliza Mohd Din
Brassinolide (BR) represents one of the plant growth regulators essential in multiple developmental processes in plants including cell division, cell elongation and reproductive development. This study was aimed to investigate the best concentration of BR for optimum growth of young banana (Musa acuminata cv. Berangan) tissue culture. The plantlets were foliar sprayed with different concentrations of BR (3, 6 and 12 g/L) at every two weeks intervals. The experiment was arranged as randomised complete block design. The results showed that BR concentration had significant effects on the growth and physiology of Musa sp. cv. Berangan. As the BR concentration increased, plant height, pseudo-stem diameter, total leaf numbers, total leaf area, fresh and dry weight of shoot were markedly increased from week 3 to week 8 after transplanting. The BR-induced plantlets had higher chlorophyll content which contributed to the increased rate of photosynthesis. The root size and distributions were, however, not significantly affected by BR. From these findings, it can be concluded that exogenous application of BR at 6.88 g/L was thebest concentration for Musa sp. cv. Berangan at nursery stage as it was able to increase the plant height and pseudo-stem diameter of the species.
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