Endophytes isolated from ginger rhizome exhibit growth promoting potential for Zea mays

TY - JOUR

T1 - Endophytes isolated from ginger rhizome exhibit growth promoting potential for Zea mays

AU - Zhang, Y.

AU - Kang, Xia

AU - Liu, Hanjun

AU - Liu, Yihao

AU - Li, Yanmei

AU - Yu, Xiumei

AU - Zhao, K.

AU - Gu, Yunfu

AU - Xu, Kaiwei

AU - Chen, Cuiping

AU - Chen, Qiang

N1 - Funding: Sichuan Provincial Sci-Tech Support Program (No. 2011 NZ0062); National Sci-Tech Support Program (2012BAD14B18); Sichuan Provincial Sci-Tech Support Program (No. 2011 NZ0062); National Sci-Tech Support Program (2012BAD14B18).

PY - 2018/7/29

Y1 - 2018/7/29

N2 - Plant growth promoting bacteria (PGPB) are known to colonize ginger rhizome. A total of 57 strains were isolated and identified by 16S rDNA PCR-RFLP fingerprinting, and were grouped into genera Serratia, Enterobacter, Acinetobacter, Pseudomonas, Stenotrophomonas, Agrobacterium, Ochrobactrum, Bacillus and Tetrathiobacter. Out of 34 representative strains, 14 were positive for indole-3-acetic acid (IAA) production (1.02–49.66 µg ml–1), 16 were able to solubilize phosphate (9.3–233.05 µg ml–1) and 18 showed siderophore activities (9.47–70.66%). Six representative strains with plant growth promoting (PGP) activities boosted the growth of Zea mays, where not only the plant height, leaf area, and biomass yield were significantly improved, plant N, P and K uptakes were also increased. Plants co-inoculated with both PGPB and chemical fertilizer also showed an increased yield. Our study thus indicates that there is an abundance of endophytic bacteria in ginger rhizome, some of which possess promising capabilities for enhancing the growth of Z. mays and have the potential to serve as bio-fertilizers for crops.

AB - Plant growth promoting bacteria (PGPB) are known to colonize ginger rhizome. A total of 57 strains were isolated and identified by 16S rDNA PCR-RFLP fingerprinting, and were grouped into genera Serratia, Enterobacter, Acinetobacter, Pseudomonas, Stenotrophomonas, Agrobacterium, Ochrobactrum, Bacillus and Tetrathiobacter. Out of 34 representative strains, 14 were positive for indole-3-acetic acid (IAA) production (1.02–49.66 µg ml–1), 16 were able to solubilize phosphate (9.3–233.05 µg ml–1) and 18 showed siderophore activities (9.47–70.66%). Six representative strains with plant growth promoting (PGP) activities boosted the growth of Zea mays, where not only the plant height, leaf area, and biomass yield were significantly improved, plant N, P and K uptakes were also increased. Plants co-inoculated with both PGPB and chemical fertilizer also showed an increased yield. Our study thus indicates that there is an abundance of endophytic bacteria in ginger rhizome, some of which possess promising capabilities for enhancing the growth of Z. mays and have the potential to serve as bio-fertilizers for crops.

KW - Ginger rhizome

KW - growth promotion

KW - identification

KW - PGPB

KW - Zea mays

U2 - 10.1080/03650340.2018.1430892

DO - 10.1080/03650340.2018.1430892

M3 - Article

AN - SCOPUS:85040977522

SN - 0365-0340

VL - 64

SP - 1302

EP - 1314

JO - Archives of Agronomy and Soil Science

JF - Archives of Agronomy and Soil Science

IS - 9

ER -