Abstract:Aims: A cadmium (Cd)-tolerant Bacillus megaterium strain A14 was used to investigate the effects and mechanisms of bacterial inoculation on peanut growth, Cd accumulation in grains and Cd fixation in Cd-contaminated soil. Methods and Results: Spectroscopic analysis showed that A14 has many functional groups (-OH, -NH2 and -COO et al.) distributed on its surface. The pot experiment indicated that compared to the Cd-contaminated soil alone treatment, inoculation with strain A14 increased shoot and root biomass b… Show more
“…Beneficial plant micro‐organisms are recommended as biological control agents (BCAs) in agricultural production due to their safety and environmental friendliness (Li et al, 2014; Mahapatra et al, 2022). At present, the use of beneficial micro‐organisms to improve crop health, and alleviate and protect plants from stress has become a research priority (Sahoo et al, 2013; Yao et al, 2021). Mohammad et al (2016) found that the endophytic bacterium Bacillus oryzicola YC7007 and its culture filtrate can significantly reduce rice bakanae by activating the JA‐hormone pathway and inducing systemic resistance against bakanae pathogens.…”
Aims: This study evaluated the control effect of the endophytic fungus Phomopsis liquidambaris B3 against rice bakanae disease (RBD) caused by Fusarium proliferatum and the disease control result of different inoculation times of beneficial micro-organisms.
Methods and Results:Rice seedlings preinoculated, coinoculated and noninoculated with B3 were exposed to F. proliferatum stress and grown under controlled conditions. Greenhouse experimental results showed that rice preinoculation with B3 significantly reduced rice bakanae disease by 21.45%, inhibited the colonization of F. proliferatum, increased defence-related enzyme activities, upregulated the expression of defence genes and promoted plant photosynthesis. However, bakanae disease in rice coinoculation with B3 increased by 11.45%, resulted in excessive reactive oxygen species (ROS) bursts and plant cell death.Conclusions: Preinoculation with the endophytic fungus P. liquidambaris B3 significantly reduced rice bakanae disease by triggering the SA-dependent defence pathways of plants, and promoted plant growth. However, coinoculatiton with P. liquidambaris B3 activated excessive defence responses, resulting in plants cell death and aggravation of bakanae disease.
Significance and Impact of the Study:This study indicated that P. liquidambaris B3 was an effective method for agricultural control against rice bakanae disease caused by F. proliferatum, and provides an experimental basis for the development of sustainable endophytic fungal resources to effectively control plant diseases caused by pathogenic fungi, and suggests that precise application of beneficial microorganisms may be become a key factor in farmland crop disease management.
“…Beneficial plant micro‐organisms are recommended as biological control agents (BCAs) in agricultural production due to their safety and environmental friendliness (Li et al, 2014; Mahapatra et al, 2022). At present, the use of beneficial micro‐organisms to improve crop health, and alleviate and protect plants from stress has become a research priority (Sahoo et al, 2013; Yao et al, 2021). Mohammad et al (2016) found that the endophytic bacterium Bacillus oryzicola YC7007 and its culture filtrate can significantly reduce rice bakanae by activating the JA‐hormone pathway and inducing systemic resistance against bakanae pathogens.…”
Aims: This study evaluated the control effect of the endophytic fungus Phomopsis liquidambaris B3 against rice bakanae disease (RBD) caused by Fusarium proliferatum and the disease control result of different inoculation times of beneficial micro-organisms.
Methods and Results:Rice seedlings preinoculated, coinoculated and noninoculated with B3 were exposed to F. proliferatum stress and grown under controlled conditions. Greenhouse experimental results showed that rice preinoculation with B3 significantly reduced rice bakanae disease by 21.45%, inhibited the colonization of F. proliferatum, increased defence-related enzyme activities, upregulated the expression of defence genes and promoted plant photosynthesis. However, bakanae disease in rice coinoculation with B3 increased by 11.45%, resulted in excessive reactive oxygen species (ROS) bursts and plant cell death.Conclusions: Preinoculation with the endophytic fungus P. liquidambaris B3 significantly reduced rice bakanae disease by triggering the SA-dependent defence pathways of plants, and promoted plant growth. However, coinoculatiton with P. liquidambaris B3 activated excessive defence responses, resulting in plants cell death and aggravation of bakanae disease.
Significance and Impact of the Study:This study indicated that P. liquidambaris B3 was an effective method for agricultural control against rice bakanae disease caused by F. proliferatum, and provides an experimental basis for the development of sustainable endophytic fungal resources to effectively control plant diseases caused by pathogenic fungi, and suggests that precise application of beneficial microorganisms may be become a key factor in farmland crop disease management.
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