Responses of the Soil Microbial Community to Salinity Stress in Maize Fields

Hou, Yaling; Zeng, Wenzhi; Hou, Menglu; Zhao, Wei; Ying, Luo; Lei, Guoqing; Zhou, Bo; Huang, Jiesheng

doi:10.3390/biology10111114

Cited by 39 publications

(20 citation statements)

References 60 publications

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“…In previous studies, we found that fungi were more vulnerable to salt than bacteria in Xinjiang saline-alkali land (Hou et al, 2021). Therefore, in this screening of plant growthpromoting rhizobacteria, we focused on bacteria.…”

Section: Discussionmentioning

confidence: 99%

Bacillus atrophaeus WZYH01 and Planococcus soli WZYH02 Improve Salt Tolerance of Maize (Zea mays L.) in Saline Soil

Hou

Zeng

et al. 2022

Front. Plant Sci.

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With the increasing shortage of land resources and people’s attention to the ecological environment, the application of microbial fertilizer with natural soil microorganisms as the main component has attracted increasing attention in saline agriculture. In this study, two salt-tolerant strains, YL07 (Bacillus atrophaeus) and YL10 (Planococcus soli), were isolated from maize (Zea mays L.) rhizosphere soil with a saturated conductivity (ECe) of 6.13 dS/m and pH of 8.32 (Xinjiang, China). The effects of B. atrophaeus WZYH01 (YL07) and Planococcus soli WZYH02 (YL10) on the growth and development of maize (Zea mays L.) under salt stress (ECe = 5.9 dS/m) were further studied. The results showed that compared with uninoculation, inoculation with B. atrophaeus WZYH01 and Planococcus soli WZYH02 significantly improved maize growth performance, biomass yield, and antioxidant levels under salt stress, and the effect of Planococcus soli WZYH02 was more prominent than the effect of B. atrophaeus WZYH01. Moreover, inoculation with B. atrophaeus WZYH01 and Planococcus soli WZYH02 protected maize from salt stress by regulating plant hormone [IAA and abscisic acid (ABA)] levels and increasing nutrient acquisition. In addition, the tested strains were most efficient for maize growth and health, increasing the content of K+ accompanied by an effective decrease in Na+ in maize tissues. The transcription levels of salt tolerance genes (ZMNHX1, ZMNHX2, ZMHKT, ZMWRKY58, and ZMDREB2A) in inoculated maize were also dramatically higher than the transcription levels of the specified salt tolerance genes in uninoculated maize. In conclusion, B. atrophaeus WZYH01 and Planococcus soli WZYH02 can alleviate the harmful effects of salt stress on crop growth, thereby promoting sustainable agricultural development.

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Section: Discussionmentioning

confidence: 99%

Bacillus atrophaeus WZYH01 and Planococcus soli WZYH02 Improve Salt Tolerance of Maize (Zea mays L.) in Saline Soil

Hou

Zeng

et al. 2022

Front. Plant Sci.

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“…We found higher dominance of Chloroflexi in date palm roots under non-saline freshwater irrigation, which are important in breaking down complex carbohydrates and polymeric organic compounds into low molecular weight substances within the rhizosphere 45 . On contrary, Firmicutes was relatively higher in saline groundwater irrigation, whose members are known to be involved in salinity stress tolerance 46 . We found lower dominance of the following orders, Rhizobiales, Streptomycetales, Actinomarinales and Burkholderiales and their representative genera in roots under non-saline freshwater irrigation indicate their aversion to higher salinity.…”

Section: Discussionmentioning

confidence: 94%

Salinity of irrigation water selects distinct bacterial communities associated with date palm (Phoenix dactylifera L.) root

Shamim

Loganathachetti

Chandran

et al. 2022

Sci Rep

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Saline water irrigation has been used in date palm (Phoenix dactylifera L.) agriculture as an alternative to non-saline water due to water scarcity in hyper-arid environments. However, the knowledge pertaining to saline water irrigation impact on the root-associated bacterial communities of arid agroecosystems is scarce. In this study, we investigated the effect of irrigation sources (non-saline freshwater vs saline groundwater) on date palm root-associated bacterial communities using 16S rDNA metabarcoding. The bacterial richness, Shannon diversity and evenness didn’t differ significantly between the irrigation sources. Soil electrical conductivity (EC) and irrigation water pH were negatively related to Shannon diversity and evenness respectively, while soil organic matter displayed a positive correlation with Shannon diversity. 40.5% of total Operational Taxonomic Units were unique to non-saline freshwater irrigation, while 26% were unique to saline groundwater irrigation. The multivariate analyses displayed strong structuring of bacterial communities according to irrigation sources, and both soil EC and irrigation water pH were the major factors affecting bacterial communities. The genera Bacillus, Micromonospora and Mycobacterium were dominated while saline water irrigation whereas contrasting pattern was observed for Rhizobium, Streptomyces and Acidibacter. Taken together, we suggest that date-palm roots select specific bacterial taxa under saline groundwater irrigation, which possibly help in alleviating salinity stress and promote growth of the host plant.

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“…Fungi, which are abundant and fast-spreading, are ubiquitous, important microorganisms in soil ecosystems ( Finlay, 2002 ). Fungi are sensitive to saline-alkali soils and are more susceptible to saline-alkali stress than bacteria ( Gavrichkova et al, 2020 ; Hou et al, 2021 ). Fungi represent one of the most diverse groups of living organisms and play an essential role in terrestrial ecosystems, functioning as plant decomposers, pathogens, and symbionts ( Zeilinger et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Crop diversity promotes the recovery of fungal communities in saline-alkali areas of the Western Songnen Plain

Liu

Zhu

et al. 2023

Front. Microbiol.

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IntroductionPhytoremediation is an effective strategy for saline land restoration. In the Western Songnen Plain, northeast China, soil fungal community recovery for saline phytoremediation has not been well documented among different cropping patterns. In this study, we tested how rotation, mixture, and monoculture cropping patterns impact fungal communities in saline-alkali soils to assess the variability between cropping patterns.MethodsThe fungal communities of the soils of the different cropping types were determined using Illumina Miseq sequencing.ResultsMixture and rotation promoted an increase in operational taxonomic unit (OTU) richness, and OTU richness in the mixture system decreased with increasing soil depth. A principal coordinate analysis (PCoA) showed that cropping patterns and soil depths influenced the structure of fungal communities, which may be due to the impact of soil chemistry. This was reflected by soil total nitrogen (TN) and electrical conductivity (EC) being the key factors driving OTU richness, while soil available potassium (AK) and total phosphorus (TP) were significantly correlated with the relative abundance of fungal dominant genus. The relative abundance of Leptosphaerulina, Alternaria, Myrothecium, Gibberella, and Tetracladium varied significantly between cropping patterns, and Leptosphaerulina was significantly associated with soil chemistry. Soil depth caused significant differences in the relative abundance of Fusarium in rotation and mixture soils, with Fusarium more commonly active at 0–15 cm deep soil. Null-model analysis revealed that the fungal community assembly of the mixture soils in 0–15 cm deep soil was dominated by deterministic processes, unlike the other two cropping patterns. Furthermore, fungal symbiotic networks were more complex in rotation and mixture than in monoculture soils, reflected in more nodes, more module hubs, and connectors. The fungal networks in rotation and mixture soils were more stable than in monoculture soils, and mixture networks were obviously more connected than rotations. FUNGuild showed that the relative proportion of saprotroph in rotation and mixture was significantly higher than that in monocultures. The highest proportion of pathotroph and symbiotroph was exhibited in rotation and mixture soils, respectively.DiscussionOverall, mixture is superior to crop rotation and monocultures in restoring fungal communities of the saline-alkali soils of the Western Songnen Plain, northeast China.

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Responses of the Soil Microbial Community to Salinity Stress in Maize Fields

Cited by 39 publications

References 60 publications

Bacillus atrophaeus WZYH01 and Planococcus soli WZYH02 Improve Salt Tolerance of Maize (Zea mays L.) in Saline Soil

Bacillus atrophaeus WZYH01 and Planococcus soli WZYH02 Improve Salt Tolerance of Maize (Zea mays L.) in Saline Soil

Salinity of irrigation water selects distinct bacterial communities associated with date palm (Phoenix dactylifera L.) root

Crop diversity promotes the recovery of fungal communities in saline-alkali areas of the Western Songnen Plain

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