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Influence of boron on the growth and biochemical changes in plant growth promoting rhizobacteria (PGPR) inoculated banana plantlets
Authors:Maziah  M.  Zuraida  A. R.  Halimi  M. S.  Zulkifli  H. S.  Sreeramanan  S.
Affiliation:(1) Department of Biochemistry, Faculty of Biotechnology and Molecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia;(2) Biotechnology Research Centre, Malaysian Agricultural Research and Development Institute (MARDI), G.P.O Box 12301, 50774 Kuala Lumpur, Malaysia;(3) Department of Agriculture Technology, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Seri Kembangan, Selangor Darul Ehsan, Malaysia;(4) Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Seri Kembangan, Selangor Darul Ehsan, Malaysia;(5) School of Biological Sciences, Universiti Sains Malaysia, Minden Heights, 11800 Penang, Malaysia
Abstract:The effects of rhizobacteria inoculation in modified MS medium containing boron (1 and 10 μM) on the biochemical components, physiological characteristics and mineral content of the in vitro banana plantlets were carried out. The presence of rhizobacteria in the medium supplemented with boron at two concentrations: 1 and 10 μM resulted in an improvement in growth and root biomass compared to the control (uninoculated). Rhizobacteria inoculation also produced an increase in protein, nitrate, soluble nitrogen and chlorophyll contents of the plantlets cultured in MS modified medium containing boron. An increase in percentage of growth (>295%) was shown when boron was applied into medium inoculated with Bacillus sphaericus UPMB10. The effectiveness of inoculation is increased when associated with boron, nitrogen or carbon into the medium. Thus, these bacterial strains could be used as a bioenhancer for growth of in vitro banana plantlets.
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