Seed coating by biofertilizer containing spores of Bacillus pumilus TUAT1 strain enhanced initial growth of Oryza sativa L. 

Abstract

In rice production, early growth is often slow in direct‐seeded system. Techniques to overcome this barrier are needed. This study evaluated the effectiveness of Kikuichi—a biofertilizer containing Bacillus pumilus TUAT1 spore—in promoting rice growth in a direct‐sowing system. Oxygen, iron, and molybdenum as coating materials were also evaluated to combine with biofertilizer. The seeds were coated with powdered Kikuichi with polyvinyl alcohol followed by a coating with calcium peroxide (CALPER), molybdenum (Benmoly), and iron powder. Double coating with the biofertilizer and Benmoly promoted plant growth. We applied amounts of Kikuichi equivalent to one, two and a half, and five times the weight of the seeds and found that the growth‐promoting effect was dependent on the amount applied. The best timing of application of the coating, specifically during sprouting, was before the coleoptile emerged. Bacillus pumilus TUAT1 can enhance the growth of rice when it exists in high concentration on the spermosphere by coating with molybdenum, but double coating with neither calcium peroxide nor iron powder contributed to the initial growth of the seeds. Kikuichi coating with Benmoly has positive effects on the rice growth. This coating method is suitable to apply biofertilizer for direct sowing cultivation of rice.

Calcite dissolving bacteria from peanut (Arachis hypogaea) pegging zone influences soil calcium level

“…Further investigation using tagged bacteria will help to track CDB in a complex soil environment and understand the mechanism underlying their low survivability in high calcium soils. Alternatively, CDB may be applied via other methods such as a seed coating or even an in-furrow spray (Malusáet al, 2012;Herrmann and Lesueur, 2013;Ma, 2019;Agake et al, 2021). One of the greatest threats to peanut production is the increased presence of A. flavus and its potential to produce the mycotoxin aflatoxin.…”

Recent advances in seed coating technologies: transitioning toward sustainable agriculture

“…In another recent study, Agake et al reported a double coating seed treatment to enhance early growth in directseeded rice cultivation. 60 The seeds were first coated with a PVA layer inoculated with a biofertilizer following which a second layer consisting of commercial coating materials was applied. Materials investigated for the secondary layer 2) seeds coated with only layer 1 (L1), (3) bi-layer coated seeds (L2).…”

“…Benmoly double coating significantly increased growth as per Tukey's test (P ≤ 0.05). Figure adapted with permission 60. Copyright Wiley 2021.…”

Diversity of Fast-Growth Spore-Forming Microbes and Their Activity as Plant Partners

“…The nutrient supplies of plants are significantly influenced by microorganisms such as bacteria and fungi [ 1 , 2 , 3 , 4 ]. Those microorganisms that have a positive effect and stimulate plant growth are defined as plant growth-promoting (PGP) microorganisms [ 5 , 6 , 7 ], including those that form spores.…”