title: Multifarious beneficial traits and plant growth promoting potential of Serratia marcescens KiSII and Enterobacter sp. RNF 267 isolated from the rhizosphere of coconut palms (Cocos nucifera L.).
abstract: Two plant growth promoting bacteria designated as KiSII and RNF 267 isolated from the rhizosphere of coconut palms were identified as Serratia marcescens and Enterobacter sp. based on their phenotypic features, BIOLOG studies and 16S rRNA gene sequence analysis. Both bacteria exhibited phosphate solubilization, ammonification, and production of indole acetic acid, β-1, 3 glucanase activities and 1-aminocyclopropane-1-carboxylate-deaminase activity. They could also tolerate a range of pH conditions, low temperature and salinity (NaCl). In addition, S. marcescens KiSII exhibited N- fixation potential, chitinase activity, siderophore production and antibiotics production. Seed bacterization with these bacteria increased the growth parameters of test plants such as paddy and cowpea over uninoculated control in green house assay. In coconut seedlings, significant increase in growth and nutrient uptake accompanied with higher populations of plant beneficial microorganisms in their rhizospheres were recorded on inoculation with both the PGPRs. The present study clearly revealed that PGPRs can aid in production of healthy and vigorous seedlings of coconut palm which are hardy perennial crops. They offer a scope to be developed into novel PGPR based bioinoculants for production of elite seedlings that can benefit the coconut farming community and the coconut based ecology.
authors.affiliation: Microbiology Section, Central Plantation Crops Research Institute (ICAR), Kasaragod, Kerala 671 124, India. rossypriya@gmail.com
authors.forename: Priya
authors.initials: P
authors.lastname: George
authors.forename: Alka
authors.initials: A
authors.lastname: Gupta
authors.forename: Murali
authors.initials: M
authors.lastname: Gopal
authors.forename: Litty
authors.initials: L
authors.lastname: Thomas
authors.forename: George V
authors.initials: GV
authors.lastname: Thomas
mesh_terms: D003059:Cocos / Q000254:growth & development* / Q000378:metabolism / Q000382:microbiology*; D004754:Enterobacter / Q000302:isolation & purification* / Q000502:physiology*; D006863:Hydrogen-Ion Concentration; D010710:Phosphates / Q000378:metabolism; D063245:Plant Development / Q000502:physiology; D010937:Plant Growth Regulators; D058441:Rhizosphere; D036226:Seedlings / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology; D012639:Seeds / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology; D012706:Serratia marcescens / Q000302:isolation & purification* / Q000502:physiology*; D012965:Sodium Chloride / Q000378:metabolism; D013696:Temperature
chemical_list: D010710:Phosphates; D010937:Plant Growth Regulators; D012965:Sodium Chloride