Effects of Sphingobium yanoikuyae SJTF8 on Rice ( Oryza sativa ) Seed Germination and Root Development

Ying-Tzy Jou, Elmi Junita Tarigan, Cahyo Prayogo, Chesly Kit Kobua, Yu-Ting Weng and Yu-Min Wang ()
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Ying-Tzy Jou: Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung County 91201, Taiwan
Elmi Junita Tarigan: International Master Program in Soil and Water Engineering, National Pingtung University of Science and Technology, Pingtung County 91201, Taiwan
Cahyo Prayogo: Department of Soil Science, Faculty of Agriculture, Brawijaya University, Jl. Veteran 1, Malang 65145, Indonesia
Chesly Kit Kobua: Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung County 91201, Taiwan
Yu-Ting Weng: Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung County 91201, Taiwan
Yu-Min Wang: General Research Center, National Pingtung University of Science and Technology, Pingtung County 91201, Taiwan

Agriculture, 2022, vol. 12, issue 11, 1-15

Abstract: The interaction between plant roots and rhizobacterium communities plays a crucial role in sustainable agriculture. We aimed to assess the effects of Sphingobium yanoikuyae SJTF8 on rice seed germination and development, as well as to observe the effects of different concentrations of S. yanoikuyae SJTF8 on the root systems of rice seedlings. The bacteria are best known for their role in the bioremediation and biodegradation of pollutants, and thus far, there is research that supports their agricultural prospects. The experiment comprised five different S. yanoikuyae SJTF8 concentrations: SP-y 8 (10 8 CFU/mL); SP-y 7 (10 7 CFU/mL); SP-y 6 (10 6 CFU/mL); SP-y 5 (10 5 CFU/mL); SP-y 4 (10 4 CFU/mL). We used sterilized water as the control treatment. The bacteria triggered the synthesis of IAA, while the seedling root lengths substantially increased on the 12th day after germination. The high application concentrations of S. yanoikuyae SJTF8 resulted in higher IAA production (with the SP-y 7 and SP-y 8 concentrations ranging from 151,029 pg/mL to 168,033 pg/mL). We found that the appropriate concentrations of S. yanoikuyae SJTF8 when applied as an inoculant were SP-y 7 and SP-y 6, based on the increased root growth and biomass production. The bacteria were also able to solubilize phosphorous. The growth response from the rice seedlings when inoculated with S. yanoikuyae SJTF8 presents the potential of the bacteria as a growth promotor. Its application in rice cultivation could be a sustainable approach to rice production.

Keywords: bio-priming; seed germination; plant-growth-promoting rhizobacteria; Sphingobium; phytohormones; indole-3-acetic acid; phosphorus solubilization; root system; rice (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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