The effects of Pantoea sp. strain Y4-4 on alfalfa in the remediation of heavy-metal-contaminated soil, and auxiliary impacts of plant residues on the remediation of saline-alkali soils.
The plant-growth-promoting rhizobacterium (PGPR) Y4-4 was isolated from plant rhizosphere soil and identified as Pantoea sp. by 16S rRNA sequence analysis. The effects of strain Y4-4 on alfalfa grown in heavy-metals-contaminated soil was investigated using a pot experiment. In a Cu-rich environment, the shoot dry mass and total dry mass of plants inoculated with strain Y4-4 increased by 22.6% and 21%, and Cu accumulation increased by 15%. In a Pb-Zn-rich environment, the shoot dry mass and total dry mass of plants inoculated with strain Y4-4 increased by 23.4% and 22%, and Zn accumulation increased by 30.3%. In addition, the salt tolerance and biomass of wheat seedlings could be improved by applying strain Y4-4 mixed with plant residue as a result of the Cu-rich plant residues providing copper nutrition to wheat. This study offers an efficient PGPR with strong salt tolerance and a safe strategy for the post-treatment of plant residue.
a College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China.
Shuhuan
S
Li
a College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China.
Jie
J
Wang
a College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China.
Nanxiong
N
Gao
b Jiangsu Provincial Academy of Agricultural Sciences, Nanjing, Jiangsu, People's Republic of China.
Lizhu
L
Liu
a College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China.|c Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, Nanjing, Jiangsu, People's Republic of China.
Yahua
Y
Chen
D018533:Biomass; D052918:Environmental Restoration and Remediation / Q000379:methods*; D000455:Medicago sativa / Q000254:growth & development*; D019216:Metals, Heavy / Q000378:metabolism*; D020636:Pantoea / Q000502:physiology*; D055049:Salt Tolerance; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
D019216:Metals, Heavy; D012989:Soil Pollutants
PGPR; RFCV; bioremediation; biorestauration; heavy metal; métaux lourds; plant-growth-promoting rhizobacteria; post-traitement des résidus de plantes; post-treatment of plant residue; rhizobactérie favorisant la croissance végétale