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Enhancing rice growth and yield with weed endophytic bacteria Alcaligenes faecalis and Metabacillus indicus under reduced chemical fertilization
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Enhancing rice growth and yield with weed endophytic bacteria Alcaligenes faecalis and Metabacillus indicus under reduced chemical fertilization
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Journal Article
Enhancing rice growth and yield with weed endophytic bacteria Alcaligenes faecalis and Metabacillus indicus under reduced chemical fertilization
2024
Overview
Endophytic bacteria, recognized as eco-friendly biofertilizers, have demonstrated the potential to enhance crop growth and yield. While the plant growth-promoting effects of endophytic bacteria have been extensively studied, the impact of weed endophytes remains less explored. In this study, we aimed to isolate endophytic bacteria from native weeds and assess their plant growth-promoting abilities in rice under varying chemical fertilization. The evaluation encompassed measurements of mineral phosphate and potash solubilization, as well as indole-3-acetic acid (IAA) production activity by the selected isolates. Two promising strains, tentatively identified as
Alcaligenes faecalis
(BTCP01) from
Eleusine indica
(Goose grass) and
Metabacillus indicus
(BTDR03) from
Cynodon dactylon
(Bermuda grass) based on 16S rRNA gene phylogeny, exhibited noteworthy phosphate and potassium solubilization activity, respectively. BTCP01 demonstrated superior phosphate solubilizing activity, while BTDR03 exhibited the highest potassium (K) solubilizing activity. Both isolates synthesized IAA in the presence of L-tryptophan, with the detection of
nifH
and
ipdC
genes in their genomes. Application of isolates BTCP01 and BTDR03 through root dipping and spraying at the flowering stage significantly enhanced the agronomic performance of rice variety CV. BRRI dhan29. Notably, combining both strains with 50% of recommended N, P, and K fertilizer doses led to a substantial increase in rice grain yields compared to control plants receiving 100% of recommended doses. Taken together, our results indicate that weed endophytic bacterial strains BTCP01 and BTDR03 hold promise as biofertilizers, potentially reducing the dependency on chemical fertilizers by up to 50%, thereby fostering sustainable rice production.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Acids
/ Alcaligenes faecalis - growth & development
/ Alcaligenes faecalis - metabolism
/ Bacteria
/ Cynodon - growth & development
/ Eleusine - growth & development
/ Genomics
/ Grasses
/ Growth
/ Indoleacetic Acids - metabolism
/ Nitrogen
/ Oryza - growth & development
/ Phenols
/ Plant Roots - growth & development
/ Plant Weeds - growth & development
/ Potash
/ Research and Analysis Methods
/ Rice
/ RNA
/ RNA, Ribosomal, 16S - genetics
/ rRNA 16S
/ Seeds
/ Spraying
/ Weeds
