Controlled-Release Diammonium Phosphate Alleviates Apple Replant Disease: An Integrated Analysis of Soil Properties, Plant Growth, and the Soil Microbiome

Wang, Xiaoqi; Yao, Yuanyuan; Wang, Guiwei; Lu, Hao; Ma, Jianchao; Zhang, Min; Chen, Xuesen; Yin, Chengmiao

doi:10.1021/acs.jafc.2c01630

Cited by 6 publications

(4 citation statements)

References 45 publications

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“…Furthermore, higher ammonium concentrations beneficially enhance plant resistance to environmental stresses . For instance, the application of diammonium phosphate to soil inhibited the pathogenic fungus Fusarium by increasing the ammonium concentration . These findings reveal the role of dopamine in regulating the soil nitrogen cycle from the perspective of soil functional genes, which is an important mechanism for the alleviation of phloridzin stress.…”

Section: Discussionmentioning

confidence: 80%

“…61 For instance, the application of diammonium phosphate to soil inhibited the pathogenic fungus Fusarium by increasing the ammonium concentration. 62 These findings reveal the role of dopamine in regulating the soil nitrogen cycle from the perspective of soil functional genes, which is an important mechanism for the alleviation of phloridzin stress. An improved understanding of the regulatory functions of dopamine on nitrogen absorption and use is expected to help reduce the requirement for nitrogen fertilizer application to crops, reduce production costs, and reduce environmental pollution caused by fertilizer loss.…”

Section: Discussionmentioning

confidence: 85%

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Dopamine Alleviates Phloridzin Toxicity in Apple by Modifying Rhizosphere Bacterial Community Structure and Function

Du,

Cao,

et al. 2024

J. Agric. Food Chem.

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Phloridzin significantly influences apple plant growth, development, and resistance to environmental stresses by engaging in various metabolic processes. Its excessive accumulation in soil, attributed to continuous monoculture practices, not only inhibits plant growth but also disrupts the rhizosphere microbial community. This study aims to explore the remedial effects of dopamine, a known antioxidant and stress resistance modulator in plants, on the adverse impacts of phloridzin stress in apple. Through hydroponic and pot experiments, it was demonstrated that dopamine significantly mitigates the growth inhibition caused by phloridzin stress in apple by reducing reactive oxygen species levels and enhancing photosynthesis and nitrogen transport. Additionally, dopamine reduced phloridzin concentrations in both the rhizosphere and roots. Furthermore, dopamine positively influences the structure of the rhizosphere microbial community, enriching beneficial microbes associated with nitrogen cycling. It increases the potential for soil nitrogen degradation and fixation by upregulating the abundance of ureC, GDH, and nif H, as revealed by metagenomic analysis. This aids in alleviating phloridzin stress. The study reveals dopamine's pivotal roles in modulating rhizosphere ecology under phloridzin stress and suggests its potential in sustainable apple cultivation practices to counter ARD and enhance productivity.

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Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 85%

Dopamine Alleviates Phloridzin Toxicity in Apple by Modifying Rhizosphere Bacterial Community Structure and Function

Du,

Cao,

et al. 2024

J. Agric. Food Chem.

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“…Graphene-based materials can be further modified with metal nanoparticles, polymers, antibiotics, or enzymes to enhance their antibacterial efficiency [44]. Similarly, cell death is observed when inorganic salts of phosphorus-nitrogen or their solutions are applied [45].…”

Section: Discussionmentioning

confidence: 99%

Changes in the Bacterial Communities of Biocomposites with Different Flame Retardants

Vasiliauskienė,

Lukša,

Servienė

et al. 2023

Life

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In today’s world, the use of environmentally friendly materials is strongly encouraged. These materials derive from primary raw materials of plant origin, like fibrous hemp, flax, and bamboo, or recycled materials, such as textiles or residual paper, making them suitable for the growth of microorganisms. Here, we investigate changes in bacterial communities in biocomposites made of hemp shives, corn starch, and either expandable graphite or a Flovan compound as flame retardants. Using Next Generation Sequencing (NGS), we found that after 12 months of incubation at 22 °C with a relative humidity of 65%, Proteobacteria accounted for >99.7% of the microbiome in composites with either flame retardant. By contrast, in the absence of flame retardants, the abundance of Proteobacteria decreased to 32.1%, while Bacteroidetes (36.6%), Actinobacteria (8.4%), and Saccharobacteria (TM7, 14.51%) appeared. Using the increasing concentrations of either expandable graphite or a Flovan compound in an LB medium, we were able to achieve up to a 5-log reduction in the viability of Bacillus subtilis, Pseudomonas aeruginosa, representatives of the Bacillus and Pseudomonas genera, the abundance of which varied in the biocomposites tested. Our results demonstrate that flame retardants act on both Gram-positive and Gram-negative bacteria and suggest that their antimicrobial activities also have to be tested when producing new compounds.

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“…ARD is instigated by the accumulation of phenolic compounds or phytotoxins in the roots affected by the disease, coupled with deleterious soil pathogens, notably fungi (Fusarium, Rhizoctonia and Cylindrocarpon) and oomycetes (Pythium and Phytophthora) (Kelderer et al, 2012;Manici et al, 2018;Wang et al, 2022a). Among the pathogens associated with ARD, recent studies have increasingly highlighted that Fusarium species are one of the primary contributors to the occurrence of ARD in China (Wang et al, 2022b;Duan et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Bacillus amyloliquefaciens BA-4 and its biocontrol potential against Fusarium-related apple replant disease

Li,

He,

Guo

et al. 2024

Front. Plant Sci.

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Apple replant disease (ARD), caused by Fusarium pathogens, is a formidable threat to the renewal of apple varieties in China, necessitating the development of effective and sustainable control strategies. In this study, the bacterial strain BA-4 was isolated from the rhizosphere soil of healthy apple trees in a replanted orchard, demonstrating a broad-spectrum antifungal activity against five crucial apple fungal pathogens. Based on its morphology, physiological and biochemical traits, utilization of carbon sources, and Gram stain, strain BA-4 was tentatively identified as Bacillus amyloliquefaciens. Phylogenetic analysis using 16S rDNA and gyrB genes conclusively identified BA-4 as B. amyloliquefaciens. In-depth investigations into B. amyloliquefaciens BA-4 revealed that the strain possesses the capacity to could secrete cell wall degrading enzymes (protease and cellulase), produce molecules analogous to indole-3-acetic acid (IAA) and siderophores, and solubilize phosphorus and potassium. The diverse attributes observed in B. amyloliquefaciens BA-4 underscore its potential as a versatile microorganism with multifaceted benefits for both plant well-being and soil fertility. The extracellular metabolites produced by BA-4 displayed a robust inhibitory effect on Fusarium hyphal growth and spore germination, inducing irregular swelling, atrophy, and abnormal branching of fungal hyphae. In greenhouse experiments, BA-4 markedly reduced the disease index of Fusarium-related ARD, exhibiting protective and therapeutic efficiencies exceeding 80% and 50%, respectively. Moreover, BA-4 demonstrated plant-promoting abilities on both bean and Malus robusta Rehd. (MR) seedlings, leading to increased plant height and primary root length. Field experiments further validated the biocontrol effectiveness of BA-4, demonstrating its ability to mitigate ARD symptoms in MR seedlings with a notable 33.34% reduction in mortality rate and improved biomass. Additionally, BA-4 demonstrates robust and stable colonization capabilities in apple rhizosphere soil, particularly within the 10-20 cm soil layer, which indicates that it has long-term effectiveness potential in field conditions. Overall, B. amyloliquefaciens BA-4 emerges as a promising biocontrol agent with broad-spectrum antagonistic capabilities, positive effects on plant growth, and strong colonization abilities for the sustainable management of ARD in apple cultivation.

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Controlled-Release Diammonium Phosphate Alleviates Apple Replant Disease: An Integrated Analysis of Soil Properties, Plant Growth, and the Soil Microbiome

Cited by 6 publications

References 45 publications

Dopamine Alleviates Phloridzin Toxicity in Apple by Modifying Rhizosphere Bacterial Community Structure and Function

Dopamine Alleviates Phloridzin Toxicity in Apple by Modifying Rhizosphere Bacterial Community Structure and Function

Changes in the Bacterial Communities of Biocomposites with Different Flame Retardants

Characterization of Bacillus amyloliquefaciens BA-4 and its biocontrol potential against Fusarium-related apple replant disease

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