Effects of a Microbial Restoration Substrate on Plant Growth and Rhizosphere Microbial Community in a Continuous Cropping Poplar

Sui, Junkang; Yang, Jiayi; Li, Chenyu; Zhang, Lingxiao; Hua, Xuewen

doi:10.3390/microorganisms11020486

Cited by 4 publications

(3 citation statements)

References 56 publications

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“…The CK group displayed a higher level of diversity in the composition of the fungal community. Concurrently, the CK group exhibited a 5.82% occurrence of Rhizoctonia , indicating the emergence of distinct fungal pathogenic communities in soils subjected to continuous cropping, which aligns with prior studies [ 62 , 63 ].…”

Section: Discussionsupporting

confidence: 88%

Microecological Shifts in the Rhizosphere of Perennial Large Trees and Seedlings in Continuous Cropping of Poplar

Sui,

Li,

Wang

et al. 2023

Microorganisms

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The cultivation of poplar trees is hindered by persistent cropping challenges, resulting in reduced wood productivity and increased susceptibility to soil-borne diseases. These issues primarily arise from alterations in microbial structure and the infiltration of pathogenic fungi. To investigate the impact on soil fertility, we conducted an analysis using soil samples from both perennial poplar trees and three successive generations of continuously cropped poplar trees. The quantity and community composition of bacteria and fungi in the rhizosphere were assessed using the Illumina MiSeq platform. The objective of this study is to elucidate the impact of continuous cropping challenges on soil fertility and rhizosphere microorganisms in poplar trees, thereby establishing a theoretical foundation for investigating the mechanisms underlying these challenges. The study found that the total bacteria in the BT group is 0.42 times higher than the CK group, and the total fungi is 0.33 times lower than the CK group. The BT and CK groups presented relatively similar bacterial richness and diversity, while the indices showed a significant (p < 0.05) higher fungal richness and diversity in the CK group. The fractions of Bacillus were 2.22% and 2.41% in the BT and CK groups, respectively. There was a 35.29% fraction of Inocybe in the BT group, whereas this was barely observed in the CK group. The fractions of Geopora were 26.25% and 5.99%, respectively in the BT and CK groups. Modifying the microbial community structure in soil subjected to continuous cropping is deemed as the most effective approach to mitigate the challenges associated with this agricultural practice.

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Section: Discussionsupporting

confidence: 88%

Microecological Shifts in the Rhizosphere of Perennial Large Trees and Seedlings in Continuous Cropping of Poplar

Sui,

Li,

Wang

et al. 2023

Microorganisms

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“…oxysporum, F. solani, R. solani, A. alternata and Phytophthora capsici; this bacterium stimulated poplar growth and also had antagonistic effects against members of the genus Rhizoctonia [350]. Another member of the genus, Bacillus cereus strain BJS-1-3, which can act as a biocontrol element against poplar pathogens, also promoted tree growth after inoculation and suppressed the growth of pathogenic species in the rhizosphere [351]. In another case, a simplified root microbiome (consisting of Pseudomonas and Burkholderia bacterial strains) derived from P. deltoides was inoculated on aseptic cultures of A. taliana and P. deltoides, resulting in increased root density, enhanced photosynthetic activity and a number of metabolic pathways [352].…”

Section: Possible Approaches To Engineering the White Poplar Microbiomementioning

confidence: 99%

Editing Metabolism, Sex, and Microbiome: How Can We Help Poplar Resist Pathogens?

Kovalev,

Gladysh,

Bogdanova

et al. 2024

IJMS

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Poplar (Populus) is a genus of woody plants of great economic value. Due to the growing economic importance of poplar, there is a need to ensure its stable growth by increasing its resistance to pathogens. Genetic engineering can create organisms with improved traits faster than traditional methods, and with the development of CRISPR/Cas-based genome editing systems, scientists have a new highly effective tool for creating valuable genotypes. In this review, we summarize the latest research data on poplar diseases, the biology of their pathogens and how these plants resist pathogens. In the final section, we propose to plant male or mixed poplar populations; consider the genes of the MLO group, transcription factors of the WRKY and MYB families and defensive proteins BbChit1, LJAMP2, MsrA2 and PtDef as the most promising targets for genetic engineering; and also pay attention to the possibility of microbiome engineering.

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“…Rhizosphere microbes provide different nutrients for plants to avoid the adverse effects caused by intense interspecific competition. However, studies on the rhizosphere microorganisms of plants in different ecological niches are mostly limited to describing microbial diversity and taxonomy [13,15,16]. Meanwhile, the mechanisms of diversity and composition remain elusive.…”

Section: Introductionmentioning

confidence: 99%

Stochastic Processes Shape Bacterial Community Diversity Patterns along Plant Niche Gradients

Yang,

Xu,

et al. 2024

Agronomy

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The ecological niche gradient is an important determinant of microbial community structure. In this paper, we studied variation in rhizosphere bacterial diversity and community composition along an ecological niche gradient. We used the high-throughput sequencing of 16S rRNA genes to study changes in the rhizosphere soil microbial communities of six grass and four shrub species during the secondary succession of abandoned farmland on the Loess Plateau of China. A structural equation model (SEM) was employed to disentangle the relative contribution of ecological niche and soil properties to bacterial diversity and community composition. Proteobacteria, Acidobacteria, and Actinobacteria were the dominant phyla of rhizosphere bacteria in all samples. During the dynamics of the plant niche from low to high, bacterial community composition transitioned from Actinobacteria + Acidobacteria to Proteobacteria + Bacteroidetes higher abundance. Moreover, the bacterial diversity and species richness changed with an increasing niche gradient, showing a clear differentiation in the rhizosphere bacterial community of grassland and shrubland. Further, diversity and species richness decreased from the middle niche of B. ischaemum to the poles, indicating that the succession process had not yet reached the climax community stage. Community assembly analysis suggested that the stochastic process gradually strengthened along the increasing ecological niche gradient, especially the drift effect. Furthermore, SEM analysis showed that the ecological niche had significant negative effects on soil properties and bacterial richness, while the effects on bacterial diversity and the stochastic processes of community assembly were weakened and insignificant. Altogether, our findings suggest that the complex interaction of the ecological niche with bacterial diversity and composition was determined by soil properties. Further, bacterial diversity was not necessarily higher with increasing ecological niche gradients.

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Effects of a Microbial Restoration Substrate on Plant Growth and Rhizosphere Microbial Community in a Continuous Cropping Poplar

Cited by 4 publications

References 56 publications

Microecological Shifts in the Rhizosphere of Perennial Large Trees and Seedlings in Continuous Cropping of Poplar

Microecological Shifts in the Rhizosphere of Perennial Large Trees and Seedlings in Continuous Cropping of Poplar

Editing Metabolism, Sex, and Microbiome: How Can We Help Poplar Resist Pathogens?

Stochastic Processes Shape Bacterial Community Diversity Patterns along Plant Niche Gradients

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