Persistence of Bacillus subtilis RB14 and its derivative strains in soil with respect to the lpa-14 gene

Isolation of Bacillus amyloliquefaciens JK6 and identification of its lipopeptides surfactin for suppressing tomato bacterial wilt

“…13 The main mechanisms with which BCAs suppressing plant diseases are a broad spectrum of synthesized antibiotic and antimicrobial compounds. 32,33 Our data demonstrated the presence of lipopeptides surfactin in the culture ltrate of JK6 by LC-MS analysis, and the concentration of surfactin was found to equal 64.24 mg L À1 . 15 Recent investigations have demonstrated that lipopeptides can not only inuence the ecological tness of the produced strain in terms of root colonization (and thereby persistence in the rhizosphere), but also have a major role in the benecial interaction of Bacillus species with plants by stimulating host defence mechanisms.…”

“…21 Some research groups have proposed that lipopeptides antibiotics production play a signicant role in protection against plant diseases either by hindering the pathogens directly or by generating systemic resistance in the host plants. 32 Though some researchers have reported the DNA quantity or expression of microbes and plant disease pathogens in the test plants or in the rhizosphere soil. Koumoustsi reported that the lipopeptides surfactin analogues demonstrated high levels of suppressive activity against F. oxysporum f.sp.cubense.…”

“…It may also contribute to their potential ability to secrete the corresponding lipopeptides into the surrounding niches. 32 Though some researchers have reported the DNA quantity or expression of microbes and plant disease pathogens in the test plants or in the rhizosphere soil. 6,14,35,36 The information on lipopeptides genes quantity during plant interaction remains unclear.…”

Correlation of Physical Properties of Inorganic Carrier and Microbial Survival Rate

“…: 3.5L, agitation speed: 500rpm, pH 7.0, aeration rate: 1vvm, period: 24hrs) Characterization of inorganic powders. Natural and synthetic zeolites(9), perlite(3), sepiolite(2), talc(2), bentonite (1), and various natural clays(33) produced in Korea were used(number of different kind of samples are in parenthesis). In the case of natural inorganic powders, the physical properties depend on the production area, compositions, and particle size even with the same structure.…”

“…For not only prevention of contamination from chemical fertilizers but also conservation of environment with high production and quality, the compost, a natural enemy, micro-organisms have been applied to substitute the place of chemical fertilizer. [1] Porous inorganic materials have been applied as microbe media, in the field of waste water treatment and fertilization. As a microbial fertilizer, microbial activity should be inactivated until it is exposed to soil.…”