担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.scitotenv.2025.179606

PubMed

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担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

Although the top-down and bottom-up concept in microbial food-webs has been a primary interest in ecology, less is still known about it in soil ecosystems. Protists are the primary top-down predators of bacterial communities, altering their compositions, while the bottom-up resources are the primary factors limiting bacterial growth. Here, we hypothesized that the top-down predators modulate soil bacterial community composition, while the bottom-up nutrients control the bacterial growth and population. To precisely control nutrient levels, we used an inert soil substitute consisting of a combination of calcined clay and sand. Nutrients equivalent to the reference paddy field soil were added to microcosms as a control treatment. To investigate the effects of C, N, and P, six additional bottom-up treatments in the absence and double amounts of the nutrients were prepared. Four top-down treatments (no protist addition, Acanthamoeba castellanii, Vermamoeba vermiformis, and Heteromita globosa) were set up for each bottom-up treatment. A total of 252 microcosms under 28 treatments were incubated. Bacterial communities were analyzed using high-throughput sequencing and real-time PCR in the 1st, 3rd, and 5th weeks. The results revealed that the top-down predators significantly altered the bacterial community composition, and the bacterial population was predominantly controlled by the bottom-up nutrients. Analysis of absolute abundance data demonstrated that both top-down and bottom-up factors shaped the bacterial community structure (community composition and population). Random forest analysis classified the amplicon sequence variants associated with the treatments, showing that mostly similar families were affected by both bottom-up and top-down factors. In conclusion, the results of this study fully supported our hypothesis that top-down predators alter community composition, while bottom-up factors influence bacterial population dynamics.

DOI： 10.1016/j.scitotenv.2024.177634

PubMed

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担当区分：最終著者,　責任著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s11104-024-06846-w

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その他リンク： https://link.springer.com/article/10.1007/s11104-024-06846-w/fulltext.html

担当区分：最終著者,　責任著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：Ankara University Faculty of Agriculture  

<p lang="en">To overcome the global problem of food shortage while supporting sustainable life on Earth, we must appreciate the critical importance of soil microorganisms—the key drivers of essential ecosystem services such as nutrient cycling and plant productivity. Protists are one of the major microbial groups in soil ecosystem including primary producers, decomposers, predators, and symbionts. The diverse morphologies and feeding strategies of predatory protists, including amoebae, ciliates, and flagellates, contribute to their versatility in capturing prey. Particularly, trophic interactions between protists and bacteria play a crucial role in regulating bacterial communities in the soil. Protists selectively prey on bacteria, influencing community composition, and enhancing microbial activity. The impact extends to nutrient cycling, secondary metabolite production, and even antibiotic resistance in soil bacterial communities. Despite recent advances, the field of applied protistology remains underexplored, necessitating further research to bridge the gap between theoretical potential and practical application. We call for increased scientific attention, research efforts, and practical implementations to fully harness the benefits of soil protistology for future agricultural practices. In this article, we introduced the frequently overlooked essential roles of predatory protists in soil ecosystem and their potential usage in sustainable agriculture.</p>

DOI： 10.15832/ankutbd.1447822

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担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s42832-023-0221-3

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その他リンク： https://link.springer.com/article/10.1007/s42832-023-0221-3/fulltext.html

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

Endophytic prokaryotes, bacteria, and archaea, are important microorganisms that benefit host plants by promoting plant growth and reducing stress. The objective of this study was to evaluate temporal shifts in the root endophytic prokaryotic communities associated with carrots (Daucus carota subsp. sativus) and the effect of organic matter application on them. Carrots were grown in a planter under five fertilizer treatments (weed compost, bark compost, cattle manure, chemical fertilizer, and no-fertilizer control) and the compositions of rhizosphere and root endosphere prokaryotic communities were determined via amplicon sequencing analysis targeting the 16S rRNA gene at 60 and 108 days after sowing. The results showed that the rhizosphere prokaryotic community compositions were stable despite different sampling times and fertilizer treatments; however, a greater temporal shift and an effect of the type of organic matter applied were observed in the endosphere prokaryotic communities. The differences in treatments resulted in significant differences in the abundance and Faith pyrogenetic diversity of the endosphere prokaryotic community. Genera, such as Burkholderia, Sphingomonas, and Rhodanobacter, that exhibit plant-growth-promoting and biocontrol activities, were detected regardless of the treatments, suggesting that they may play an important ecological role as the core endophytes in carrot roots.

DOI： 10.3390/microorganisms11102377

PubMed

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掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-023-01743-3

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その他リンク： https://link.springer.com/article/10.1007/s00374-023-01743-3/fulltext.html

担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-023-01733-5

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その他リンク： https://link.springer.com/article/10.1007/s00374-023-01733-5/fulltext.html

担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-023-01705-9

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その他リンク： https://link.springer.com/article/10.1007/s00374-023-01705-9/fulltext.html

掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-022-01619-y

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その他リンク： https://link.springer.com/article/10.1007/s00374-022-01619-y/fulltext.html

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media {LLC}  

DOI： 10.1007/s00374-021-01611-y

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その他リンク： https://link.springer.com/article/10.1007/s00374-021-01611-y/fulltext.html

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

The loss of cropland soils, climate change, and population growth are directly affecting the food supply. Given the higher incidence of salinity and extreme events, the cereal performance and yield are substantially hampered. Wheat is forecast to decline over the coming years due to the salinization widespread as one of the oldest and most environmental severe constraints facing global cereal production. To increase salinity tolerance of wheat, in this study, we developed two new salt-tolerant bread wheats, named 'Maycan' and 'Yıldız'. The salinity tolerance of these lines, their parents, and a salt-sensitive cultivar has been tested from measurements of physiological, biochemical, and genes associated with osmotic adjustment/plant tolerance in cultures containing 0 and 150 mM NaCl at the seedling stage. Differential growth reductions to increased salinity were observed in the salt-sensitive cultivar, with those newly developed exhibiting significantly greater root length, growth of shoot and water content as salinity tolerances overall than their parents. 'Maycan' and 'Yıldız' had higher osmoregulator proline content and antioxidants enzyme activities under salinity than the other bread wheat tested. Notably, an important upregulation in the expression of genes related to cellular ion balance, osmolytes accumulation, and abscisic acid was observed in both new wheat germplasms, which may improve salt tolerance. These finding revealed that 'Maycan' and 'Yıldız' exhibit high-salt tolerance at the seedling stage and differing in their tolerance mechanisms to the other tested cultivars, thereby providing an opportunity for their exploitation as modern bread wheats.

DOI： 10.1016/j.plaphy.2021.05.041

PubMed

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.envexpbot.2021.104648

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.rhisph.2021.100357

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-020-01523-3

Scopus

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その他リンク： http://link.springer.com/article/10.1007/s00374-020-01523-3/fulltext.html

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-020-01525-1

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その他リンク： http://link.springer.com/article/10.1007/s00374-020-01525-1/fulltext.html

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-020-01502-8

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その他リンク： https://link.springer.com/article/10.1007/s00374-020-01502-8/fulltext.html

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Japanese Society of Microbial Ecology  

DOI： 10.1264/jsme2.me20093

Scopus

PubMed

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.apsoil.2020.103599

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.rhisph.2017.08.001

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Informa UK Limited  

DOI： 10.1080/00380768.2016.1238281

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人日本土壌肥料学会  

DOI： 10.1080/00380768.2015.1049931

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開催年月日： 2021年12月

記述言語：英語   会議種別：口頭発表（一般）  

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開催年月日： 2021年12月

記述言語：英語   会議種別：ポスター発表  

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開催年月日： 2021年12月

会議種別：口頭発表（一般）  

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開催年月日： 2021年12月

会議種別：ポスター発表  

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開催年月日： 2021年12月

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開催年月日： 2021年12月

記述言語：英語  

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開催年月日： 2021年9月

会議種別：口頭発表（一般）  

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開催年月日： 2021年1月

会議種別：ポスター発表  

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開催年月日： 2020年9月

会議種別：口頭発表（一般）  

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開催年月日： 2019年6月

会議種別：口頭発表（一般）  

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開催年月日： 2019年5月

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開催年月日： 2017年10月

会議種別：口頭発表（一般）  

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開催年月日： 2015年10月

会議種別：口頭発表（一般）  

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開催年月日： 2014年1月

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開催年月日： 2013年11月

記述言語：英語   会議種別：ポスター発表  

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開催年月日： 2012年9月

記述言語：英語   会議種別：ポスター発表  

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会議種別：口頭発表（一般）  

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会議種別：ポスター発表  

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