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Biblioteca(s): |
Embrapa Clima Temperado. |
Data corrente: |
19/01/2024 |
Data da última atualização: |
19/01/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
PEREIRA, P.; SANTANA, F. M.; DALLEGRAVE, A.; VAN DER SAND, S. T. |
Afiliação: |
PRISCILA PEREIRA, UNIVERSIDADE FEDERAL DE PELOTAS; FLAVIO MARTINS SANTANA, CPACT; ALEXSANDRO DALLEGRAVE, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; SUELI TERESINHA VAN DER SAND, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL. |
Título: |
Antifungal activity of Streptomyces spp. against Pyrenophora tritici-repentis the causal agent of tan spot in wheat. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Journal of Plant Protection Research, v. 63, n. 3, p. 331-339, 2023. |
ISSN: |
1899-007X |
DOI: |
https://doi.org/10.24425/jppr.2023.146871 |
Idioma: |
Inglês |
Conteúdo: |
Tan spot, caused by Pyrenophora tritici-repentis (Ptr), is a worrisome destructive foliar disease of wheat-growing areas around the world. Streptomyces spp. have been investigated as biocontrol agents because they beneficially interact with host plants and produce important bioactive substances that can act in the suppression of diseases in plants. In the present study, antifungal activity and plant growth-promoting of Streptomyces spp. strains 6(4), R18(6), and their consortium, were evaluated through in vitro and greenhouse assays. The Ultra High-Performance Liquid Chromatography-Quadrupole Time-of-Flight Mass Spectrometry (UHPLC-QTOF MS) technique was used to analyze the crude extract of each strain. The results of the in vitro tests showed that the 6(4) metabolites caused several abnormalities in the conidial germination of Ptr. This strain also produced indole acetic acid (IAA) and siderophores. Strain R18(6) did not alter conidial germination of Ptr, and produced IAA and phosphate solubilizers. In the greenhouse, the treatment ‘seed inoculation plus foliar spray’ with streptomycetes propagules and metabolites contributed to biomass gain, with no statistical difference between the strains (p < 0.05). Treatments with 6(4) ‘seed inoculation’, ‘seed inoculation plus foliar spray’, and consortium ‘seed inoculation’ showed the lowest percentage of injured area compared to other treatments (p < 0.05). UHPLC-QTOF MS data showed that erucamide is present in the culture of 6(4), but not in the culture of R18(6). Therefore, this substance is one of those involved in Ptrhyphal abnormalities, and R18(6) use indirect mechanisms of action to control Ptr. We concluded that these Streptomyces spp. and their metabolites have a promising potential for biological control of Ptr to protect wheat plants from tan spot damage. MenosTan spot, caused by Pyrenophora tritici-repentis (Ptr), is a worrisome destructive foliar disease of wheat-growing areas around the world. Streptomyces spp. have been investigated as biocontrol agents because they beneficially interact with host plants and produce important bioactive substances that can act in the suppression of diseases in plants. In the present study, antifungal activity and plant growth-promoting of Streptomyces spp. strains 6(4), R18(6), and their consortium, were evaluated through in vitro and greenhouse assays. The Ultra High-Performance Liquid Chromatography-Quadrupole Time-of-Flight Mass Spectrometry (UHPLC-QTOF MS) technique was used to analyze the crude extract of each strain. The results of the in vitro tests showed that the 6(4) metabolites caused several abnormalities in the conidial germination of Ptr. This strain also produced indole acetic acid (IAA) and siderophores. Strain R18(6) did not alter conidial germination of Ptr, and produced IAA and phosphate solubilizers. In the greenhouse, the treatment ‘seed inoculation plus foliar spray’ with streptomycetes propagules and metabolites contributed to biomass gain, with no statistical difference between the strains (p < 0.05). Treatments with 6(4) ‘seed inoculation’, ‘seed inoculation plus foliar spray’, and consortium ‘seed inoculation’ showed the lowest percentage of injured area compared to other treatments (p < 0.05). UHPLC-QTOF MS data showed that erucamide is present in the culture of 6(4),... Mostrar Tudo |
Palavras-Chave: |
Mancha bronzeada. |
Thesagro: |
Doença; Doença Fúngica; Trigo. |
Thesaurus Nal: |
Pyrenophora tritici-repentis; Wheat. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1161065/1/Artigo2023-Pereira.pdf
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Marc: |
LEADER 02655naa a2200253 a 4500 001 2161065 005 2024-01-19 008 2023 bl uuuu u00u1 u #d 022 $a1899-007X 024 7 $ahttps://doi.org/10.24425/jppr.2023.146871$2DOI 100 1 $aPEREIRA, P. 245 $aAntifungal activity of Streptomyces spp. against Pyrenophora tritici-repentis the causal agent of tan spot in wheat.$h[electronic resource] 260 $c2023 520 $aTan spot, caused by Pyrenophora tritici-repentis (Ptr), is a worrisome destructive foliar disease of wheat-growing areas around the world. Streptomyces spp. have been investigated as biocontrol agents because they beneficially interact with host plants and produce important bioactive substances that can act in the suppression of diseases in plants. In the present study, antifungal activity and plant growth-promoting of Streptomyces spp. strains 6(4), R18(6), and their consortium, were evaluated through in vitro and greenhouse assays. The Ultra High-Performance Liquid Chromatography-Quadrupole Time-of-Flight Mass Spectrometry (UHPLC-QTOF MS) technique was used to analyze the crude extract of each strain. The results of the in vitro tests showed that the 6(4) metabolites caused several abnormalities in the conidial germination of Ptr. This strain also produced indole acetic acid (IAA) and siderophores. Strain R18(6) did not alter conidial germination of Ptr, and produced IAA and phosphate solubilizers. In the greenhouse, the treatment ‘seed inoculation plus foliar spray’ with streptomycetes propagules and metabolites contributed to biomass gain, with no statistical difference between the strains (p < 0.05). Treatments with 6(4) ‘seed inoculation’, ‘seed inoculation plus foliar spray’, and consortium ‘seed inoculation’ showed the lowest percentage of injured area compared to other treatments (p < 0.05). UHPLC-QTOF MS data showed that erucamide is present in the culture of 6(4), but not in the culture of R18(6). Therefore, this substance is one of those involved in Ptrhyphal abnormalities, and R18(6) use indirect mechanisms of action to control Ptr. We concluded that these Streptomyces spp. and their metabolites have a promising potential for biological control of Ptr to protect wheat plants from tan spot damage. 650 $aPyrenophora tritici-repentis 650 $aWheat 650 $aDoença 650 $aDoença Fúngica 650 $aTrigo 653 $aMancha bronzeada 700 1 $aSANTANA, F. M. 700 1 $aDALLEGRAVE, A. 700 1 $aVAN DER SAND, S. T. 773 $tJournal of Plant Protection Research$gv. 63, n. 3, p. 331-339, 2023.
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Embrapa Clima Temperado (CPACT) |
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Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
03/03/2022 |
Data da última atualização: |
17/03/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
BONATTI, M.; ERISMANN, C.; ASKHABALIEVA, A.; BORBA, J.; POPE, K.; REYNALDO, R.; EUFEMIA, L.; TURETTA, A. P. D.; SIEBER, S. |
Afiliação: |
MICHELLE BONATTI, Leibniz Centre for Agricultural Landscape Research/Humboldt University of Berlin; CARLA ERISMANN, Leibniz Centre for Agricultural Landscape Research/Humboldt University of Berlin; AYNA ASKHABALIEVA, Leibniz Centre for Agricultural Landscape Research; JULIANO BORBA, Leibniz Centre for Agricultural Landscape Research; KAMILA POPE, Leibniz Centre for Agricultural Landscape Research; RENATA REYNALDO, UFRJ; LUCA EUFEMIA, Leibniz Centre for Agricultural Landscape Research/Humboldt University of Berlin; ANA PAULA DIAS TURETTA, CNPS; STEFAN SIEBER, Leibniz Centre for Agricultural Landscape Research/Humboldt University of Berlin. |
Título: |
Social learning as an underlying mechanism for sustainability in neglected communities: the Brazilian case of the Bucket Revolution project. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Environment, Development and Sustainability, 2022. |
DOI: |
https://doi.org/10.1007/s10668-022-02167-z |
Idioma: |
Inglês |
Notas: |
On-line first. |
Conteúdo: |
In neglected communities, waste and organic residues are not only a vector of several problems, like diseases and water pollution, but also a contributor to increasing forms of vulnerability and marginalization. At the same time, these communities also have presented innovative local initiatives and transformative learning about natural resources management that can be a vehicle for achieving more sustainable food systems. In the south of Brazil, community-based organic residue management has shown an extraordinary potential to improve food security and livelihoods for (~1600) community members of a vulnerable urban territory. In this context, the overall objective of this article is (a) To better understand what Social Learning (SL) processes related to successful organic residues management in neglected communities exist and (b) To identify what knowledge systems are created in one empirical case. The study case is based on a communitarian waste management project, the Bucket Revolution Project (BRP). The analytical framework builds upon social learning theory and its triple-loop process focusing on four specific phenomena. The applied mixed-methods approach was made in four steps: 1. a focus group to investigate collective community issues; 2. semi-structured interviews to investigate specific and individual issues in the context of the BRP; 3. social media analysis to better understand the BRP narratives; and finally 4. participant observation in community and institutional meetings. Mainly using MaxQda software and coding indicators of SL, the data show that "Diversity of knowledge integration" is the most identified SL indicator in the interviews (52%). For BRP, identity development, community conditions improvement, and environment understanding are three key components of the knowledge system enhanced through an underlying process of social learning. Furthermore, the study also shows that there are endogenous and exogenous social learning processes at work. MenosIn neglected communities, waste and organic residues are not only a vector of several problems, like diseases and water pollution, but also a contributor to increasing forms of vulnerability and marginalization. At the same time, these communities also have presented innovative local initiatives and transformative learning about natural resources management that can be a vehicle for achieving more sustainable food systems. In the south of Brazil, community-based organic residue management has shown an extraordinary potential to improve food security and livelihoods for (~1600) community members of a vulnerable urban territory. In this context, the overall objective of this article is (a) To better understand what Social Learning (SL) processes related to successful organic residues management in neglected communities exist and (b) To identify what knowledge systems are created in one empirical case. The study case is based on a communitarian waste management project, the Bucket Revolution Project (BRP). The analytical framework builds upon social learning theory and its triple-loop process focusing on four specific phenomena. The applied mixed-methods approach was made in four steps: 1. a focus group to investigate collective community issues; 2. semi-structured interviews to investigate specific and individual issues in the context of the BRP; 3. social media analysis to better understand the BRP narratives; and finally 4. participant observation in community and institutio... Mostrar Tudo |
Palavras-Chave: |
Community-based food systems; Endogenous social learning; Socio-ecological innovation; Transformative learning; Triple-loop learning. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/232092/1/Social-learning-as-an-underlying-mechanism-for-sustainability-2022.pdf
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Marc: |
LEADER 02969naa a2200301 a 4500 001 2140500 005 2022-03-17 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1007/s10668-022-02167-z$2DOI 100 1 $aBONATTI, M. 245 $aSocial learning as an underlying mechanism for sustainability in neglected communities$bthe Brazilian case of the Bucket Revolution project.$h[electronic resource] 260 $c2022 500 $aOn-line first. 520 $aIn neglected communities, waste and organic residues are not only a vector of several problems, like diseases and water pollution, but also a contributor to increasing forms of vulnerability and marginalization. At the same time, these communities also have presented innovative local initiatives and transformative learning about natural resources management that can be a vehicle for achieving more sustainable food systems. In the south of Brazil, community-based organic residue management has shown an extraordinary potential to improve food security and livelihoods for (~1600) community members of a vulnerable urban territory. In this context, the overall objective of this article is (a) To better understand what Social Learning (SL) processes related to successful organic residues management in neglected communities exist and (b) To identify what knowledge systems are created in one empirical case. The study case is based on a communitarian waste management project, the Bucket Revolution Project (BRP). The analytical framework builds upon social learning theory and its triple-loop process focusing on four specific phenomena. The applied mixed-methods approach was made in four steps: 1. a focus group to investigate collective community issues; 2. semi-structured interviews to investigate specific and individual issues in the context of the BRP; 3. social media analysis to better understand the BRP narratives; and finally 4. participant observation in community and institutional meetings. Mainly using MaxQda software and coding indicators of SL, the data show that "Diversity of knowledge integration" is the most identified SL indicator in the interviews (52%). For BRP, identity development, community conditions improvement, and environment understanding are three key components of the knowledge system enhanced through an underlying process of social learning. Furthermore, the study also shows that there are endogenous and exogenous social learning processes at work. 653 $aCommunity-based food systems 653 $aEndogenous social learning 653 $aSocio-ecological innovation 653 $aTransformative learning 653 $aTriple-loop learning 700 1 $aERISMANN, C. 700 1 $aASKHABALIEVA, A. 700 1 $aBORBA, J. 700 1 $aPOPE, K. 700 1 $aREYNALDO, R. 700 1 $aEUFEMIA, L. 700 1 $aTURETTA, A. P. D. 700 1 $aSIEBER, S. 773 $tEnvironment, Development and Sustainability, 2022.
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