Ecological stoichiometry, salt ions and homeostasis characteristics of different types of halophytes and soils

Zhao, Yinghan; Li, Tian; Liu, Junhan; Sun, Jingkuan; Zhang, Ping

doi:10.3389/fpls.2022.990246

Cited by 11 publications

(27 citation statements)

References 52 publications

(64 reference statements)

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“…In contrast, N addition did not alter P. communis secretion (Nishimura & Tsuyuzaki, 2015). In addition, the P. communis stores as much N as possible to maintain its photosynthetic capacity, which accelerates the uptake of soil N by the P. communis (Zhao, Li, Liu, et al, 2022).…”

Section: Effect Of N Addition On Rhizosphere and Bulk Soil Bacterial ...mentioning

confidence: 86%

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Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Zhang

Shao

et al. 2023

Land Degrad Dev

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The total amount and rate of atmospheric nitrogen (N) deposition are constantly increasing, which substantially influences the soil microbial community structure and function. However, it is still unclear whether the responses of different plant rhizosphere soil bacterial community to short‐term N addition was consistent. Based on 16s rRNA sequencing, we investigated the responses of rhizosphere and bulk soil bacterial community of halophytes (salt‐absorbing, salt‐rejecting, and salt‐secreting plant) to short‐term N addition in the Yellow River Delta. The bacterial community α‐diversity of Suaeda salsa (salt‐absorbing plant) was significantly higher in rhizosphere soil than in bulk soil, while no significant difference between Phragmites communis (salt‐rejecting plant) rhizosphere and bulk soil bacterial community α‐diversity was found. The differences were mainly ascribed to the higher N uptake capacity of P. communis, which resulted in no difference in N content between rhizosphere and bulk soil. The short‐term N addition significantly increased the α‐diversity of bacterial community in the rhizosphere soil of Aeluropus sinensis (salt‐secreting plant), but there was no effect on the α‐diversity of bacterial community in the rhizosphere soil of P. communis. Nitrogen addition enhances the salt uptake capacity of A. sinensis and alleviates the salt stress of bacterial growth. The relative abundance of Bacteroidetes for S. salsa and A. sinensis was significantly higher in rhizosphere soil than in bulk soil, and the relative abundance of Actinobacteria for P. communis and S. salsa was higher and lower in rhizosphere soil than in bulk soil, respectively. Salt‐absorbing of S. salsa leads to elevated rhizosphere soil salinity. Higher salinity and abundant carbon promote the Bacteroidetes and inhibit the Actinobacteria. Short‐term N addition caused an increase in the relative abundance of Gemmatimonadetes in halophyte rhizosphere soil and a decrease in the relative abundance of Firmicutes in S. salsa and A. sinensis bulk soil, which may be due to the different response of C:N of root secretions to N addition in halophytes. The relative abundance of rhizosphere soil denitrifying bacteria was higher in S. salsa and A. sinensis than in P. communis, while the reverse was observed for N‐fixing bacteria. The relative abundance of denitrifying bacteria decreased in P. communis and increased in S. salsa and A. sinensis. The low N soil environment of P. communis promotes the activity of N‐fixing bacteria, and the abundant N content of S. salsa and A. sinensis soil promotes the denitrification process. The research clarified that the response of soil bacterial community to short‐term N addition Treatment differed due to the influence of plant species and that N additions had smaller effects on the bacterial community than plant species.

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Section: Effect Of N Addition On Rhizosphere and Bulk Soil Bacterial ...mentioning

confidence: 86%

“…Different salt metabolism mechanisms differ in their effects on the soil microenvironment (Zhao, Li, Liu, et al, 2022;Zhao, Li, Shao, et al, 2022). The N addition may strengthen the salt metabolism capacity and indirectly affect the bacterial community.…”

Section: Introductionmentioning

confidence: 99%

Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Zhang

Shao

et al. 2023

Land Degrad Dev

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“…However, in rhizosphere soil, TN content did change insignificantly with increasing N and P ratios. Zhao et al. (2022b) found that P.communis absorb as much soil N as possible and stores it in their body to provide for their growth.…”

Section: Discussionmentioning

confidence: 99%

“…However, in rhizosphere soil, TN content did change insignificantly with increasing N and P ratios. Zhao et al (2022b) found that P.communis absorb as much soil N as possible and stores it in their body to provide for their growth. SEM showed a significant positive effect of TN content on a-diversity, which may be caused by the N limitation of the rhizosphere bacterial community due to the uptake of soil N with P.communis.…”

Section: Effect Of N and P Addition Ratio On The A-diversitymentioning

confidence: 99%

“…Pseudomonas has been shown to suppress plant pathogens and promote plant growth (Tao et al, 2020). In addition, Pseudomonas has a strong N fixation capacity (Li et al, 2022b) and can provide N for P.communis, which may also be an important reason why P.communis can adapt to N-deprived habitat. Both the Cyclobacteriaceae family and MND1 genera were also found to promote plant growth (Li et al, 2020;Cheng et al, 2022), which is consistent with our study.…”

Section: Effect Of Plants On Bacterial Communitymentioning

confidence: 99%

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Plants changed the response of bacterial community to the nitrogen and phosphorus addition ratio

Zhang

Sun

et al. 2023

Front. Plant Sci.

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IntroductionHuman activities have increased the nitrogen (N) and phosphorus (P) supply ratio of the natural ecosystem, which affects the growth of plants and the circulation of soil nutrients. However, the effect of the N and P supply ratio and the effect of plant on the soil microbial community are still unclear.MethodsIn this study, 16s rRNA sequencing was used to characterize the response of bacterial communities in Phragmites communis (P.communis) rhizosphere and non-rhizosphere soil to N and P addition ratio.ResultsThe results showed that the a-diversity of the P.communis rhizosphere soil bacterial community increased with increasing N and P addition ratio, which was caused by the increased salt and microbially available C content by the N and P ratio. N and P addition ratio decreased the pH of non-rhizosphere soil, which consequently decreased the a-diversity of the bacterial community. With increasing N and P addition ratio, the relative abundance of Proteobacteria and Bacteroidetes increased, while that of Actinobacteria and Acidobacteria decreased, which reflected the trophic strategy of the bacterial community. The bacterial community composition of the non-rhizosphere soil was significantly affected by salt, pH and total carbon (TC) content. Salt limited the relative abundance of Actinobacteria, and increased the relative abundance of Bacteroidetes. The symbiotic network of the rhizosphere soil bacterial community had lower robustness. This is attributed to the greater selective effect of plants on the bacterial community influenced by nutrient addition.DiscussionPlants played a regulatory role in the process of N and P addition affecting the bacterial community, and nutrient uptake by the root system reduced the negative impact of N and P addition on the bacterial community. The variations in the rhizosphere soil bacterial community were mainly caused by the response of the plant to the N and P addition ratio.

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Study on ecological stoichiometry homeostasis characteristics of different halophytes in the Yellow River Delta

Zhao,

Li,

Sun

et al. 2023

Land Degrad Dev

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Ecological stoichiometric homeostasis represents the physiological and biochemical adaptations of organisms to variations in environmental conditions and plays a pivotal role in maintaining ecosystem stability. However, existing literature predominantly concentrates on the changes in plant homeostasis under different external environments. There is a paucity of comparative analyses focusing on the stoichiometric homeostasis attributes among different types of halophytes, particularly using these halophytes as a primary investigative lens. In this study, by analyzing the differences in organ and soil ecological stoichiometry as well as salt accumulation characteristics of three halophytes (Phragmites communis, Suaeda salsa, and Tamarix chinensis) in the Yellow River Delta, we revealed the salt ion enrichment capacity and stoichiometric homeostasis characteristics of the three halophytes and clarified the adaptive capacity of the three halophytes in saline soil environments. Our results indicated that S. salsa accumulated more Na+ and Mg2+, while P. communis maintained a low salt content in its surrounding soil. The soil C:N ratios of P. communis and S. salsa negatively correlated with most ions, while T. chinensis displayed a positive correlation with ions. S. salsa demonstrated the highest ion enrichment but the least homeostasis, whereas T. chinensis showed superior homeostasis. We hypothesize that T. chinensis might have experienced a faster growth rate during the study period, and P. communis' topsoil appears to be more conducive for plant growth. The different salt tolerance strategies of these plants influenced homeostasis, with S. salsa demonstrating greater adaptability to soil modifications and higher potential in saline land management. These insights enhance our understanding of the physiological and ecological adaptations of halophytes and their contribution to improving the quality of saline soils in the Yellow River Delta.

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Ecological stoichiometry, salt ions and homeostasis characteristics of different types of halophytes and soils

Cited by 11 publications

References 52 publications

Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Plants changed the response of bacterial community to the nitrogen and phosphorus addition ratio

Study on ecological stoichiometry homeostasis characteristics of different halophytes in the Yellow River Delta

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