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Photosynthetica

, Volume 56, Issue 4, pp 1188–1203 | Cite as

Physiological changes and growth promotion induced in poplar seedlings by the plant growth-promoting rhizobacteria Bacillus subtilis JS

  • J. H. Jang
  • S. -H. Kim
  • I. Khaine
  • M. J. Kwak
  • H. K. Lee
  • T. Y. Lee
  • W. Y. Lee
  • S. Y. Woo
Original paper
  • 39 Downloads

Abstract

This study aimed to determine the effects of plant growth-promoting rhizobacteria Bacillus subtilis JS on the growth and physiological changes of Populus euramericana and Populus deltoides × P. nigra. Poplar seedlings were treated with B. subtilis JS and their growth was monitored for up to 120 d. Three different types of treatments [control, B1 (B. subtilis:double-distilled water, 1:100, v/v), and B2 (1:50)] were established. B. subtilis JS enhanced seedling height by 62% and total biomass by 37% after 120 d. Physiologically, the photosynthetic rate increased by 54%, and the total chlorophyll (Chl) content, foliage nitrogen and phosphate content were significantly higher after treatment with B2 than that of the control. These results suggest that the total Chl content is directly related to not only the photosynthetic capacity of the foliage but also to the nitrogen content, indicating that the strain JS may promote the growth of poplar.

Additional key words

biofertilization biomass fast-growing tree gas exchange pigment root activity 

Abbreviations

B1

Bacillus subtilis JS inoculation with double-distilled water (dilution rate of 1 in 100)

B2

Bacillus subtilis JS inoculation with double-distilled water (dilution rate of 1 in 50)

CarT

total carotenoid

ChlT

total chlorophyll

CFUs

colonyforming units

DDW

double-distilled water

E

transpiration rate

gs

stomatal conductance

NLeaf

total nitrogen content of leaf

PGPR

plant growth-promoting rhizobacteria

PLeaf

phosphate content of leaf

PN

net photosynthetic rate

RGR

relative growth rate

ROS

reactive oxygen species

SRCs

short rotation coppice cultures

TF

triphenyl formazan

TTC

triphenyltetrazolium chloride

WUE

water-use efficiency

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Copyright information

© The Institute of Experimental Botany 2018

Authors and Affiliations

  • J. H. Jang
    • 1
  • S. -H. Kim
    • 1
  • I. Khaine
    • 1
  • M. J. Kwak
    • 1
  • H. K. Lee
    • 1
  • T. Y. Lee
    • 1
  • W. Y. Lee
    • 2
  • S. Y. Woo
    • 1
  1. 1.Department of Environmental HorticultureUniversity of SeoulSeoulKorea
  2. 2.Division of Forest Tree ImprovementNational Institute of Forest ScienceSuwonKorea

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