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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sul. Para informações adicionais entre em contato com cppsul.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
30/12/2020 |
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Data da última atualização: |
16/09/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PIVETA, L. B.; ROMA-BURGOS, N.; NOLDIN, J. A.; VIANA, V. E.; OLIVEIRA, C. de; LAMEGO, F. P.; AVILA, L. A. |
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Afiliação: |
Leonard Bonilha Piveta, UFPEL; Nilda Roma-Burgos, University of Arkansas; José Alberto Noldin, EPAGRI; Vívian Ebeling Viana, UFPEL; Claudia de Oliveira, UFPEL; FABIANE PINTO LAMEGO, CPPSUL; Luis Antonio de Avila, UFPEL. |
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Título: |
Molecular and physiological responses of rice and weedy rice to heat and drought stress. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Agriculture, v. 11, n. 1, 9-11010009, Jan. 2021. |
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DOI: |
https://dx.doi.org/10.3390/ agriculture |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract:Rice is the staple food for about half of the world population. Rice grain yield and qualityare affected by climatic changes. Arguably, rice cultivars genetic diversity is diminished from decadesof breeding using narrow germplasm, requiring introgressions from otherOryzaspecies, weedy orwild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement.Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in responseto heat and drought stress. Drought and heat stress affected the phenotype and photosyntheticparameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded betterunder heat stress than the non-stressed check. Drought stress upregulatedHSF7Awhile heat stressupregulatedHSF2a.HSP74.8,HSP80.2,andHSP24.1were upregulated in both conditions. Basedon all evaluated traits, we hypothesized that in drought conditions increasingHSFA7expressionis related to tiller number and that increase WUE (water use efficiency) andHSFA2aexpressionare associated with yield. In heat conditions, Gs(stomatal conductance) and Es increases may berelated to plant height; tiller number is inversely associated withHSPsexpression, and chlorophyllcontent and Ci(intercellular CO2concentration) may be related to yield. Based on morphology,physiology, and gene regulation in heat and drought stress, we can discriminate genotypes thatperform well under these stress conditions and utilize such genotypes as a source of genetic diversityfor rice breeding.Keywords:genetic diversity; photosynthesis; heat shock protein MenosAbstract:Rice is the staple food for about half of the world population. Rice grain yield and qualityare affected by climatic changes. Arguably, rice cultivars genetic diversity is diminished from decadesof breeding using narrow germplasm, requiring introgressions from otherOryzaspecies, weedy orwild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement.Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in responseto heat and drought stress. Drought and heat stress affected the phenotype and photosyntheticparameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded betterunder heat stress than the non-stressed check. Drought stress upregulatedHSF7Awhile heat stressupregulatedHSF2a.HSP74.8,HSP80.2,andHSP24.1were upregulated in both conditions. Basedon all evaluated traits, we hypothesized that in drought conditions increasingHSFA7expressionis related to tiller number and that increase WUE (water use efficiency) andHSFA2aexpressionare associated with yield. In heat conditions, Gs(stomatal conductance) and Es increases may berelated to plant height; tiller number is inversely associated withHSPsexpression, and chlorophyllcontent and Ci(intercellular CO2concentration) may be related to yield. Based on morphology,physiology, and gene regulation in heat and drought stress, we can... Mostrar Tudo |
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Palavras-Chave: |
Diversidade genética. |
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Thesagro: |
Arroz; Fotossíntese; Resposta da Planta. |
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Categoria do assunto: |
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Marc: |
LEADER 02460naa a2200253 a 4500
001 2128885
005 2021-09-16
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://dx.doi.org/10.3390/ agriculture$2DOI
100 1 $aPIVETA, L. B.
245 $aMolecular and physiological responses of rice and weedy rice to heat and drought stress.$h[electronic resource]
260 $c2021
520 $aAbstract:Rice is the staple food for about half of the world population. Rice grain yield and qualityare affected by climatic changes. Arguably, rice cultivars genetic diversity is diminished from decadesof breeding using narrow germplasm, requiring introgressions from otherOryzaspecies, weedy orwild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement.Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in responseto heat and drought stress. Drought and heat stress affected the phenotype and photosyntheticparameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded betterunder heat stress than the non-stressed check. Drought stress upregulatedHSF7Awhile heat stressupregulatedHSF2a.HSP74.8,HSP80.2,andHSP24.1were upregulated in both conditions. Basedon all evaluated traits, we hypothesized that in drought conditions increasingHSFA7expressionis related to tiller number and that increase WUE (water use efficiency) andHSFA2aexpressionare associated with yield. In heat conditions, Gs(stomatal conductance) and Es increases may berelated to plant height; tiller number is inversely associated withHSPsexpression, and chlorophyllcontent and Ci(intercellular CO2concentration) may be related to yield. Based on morphology,physiology, and gene regulation in heat and drought stress, we can discriminate genotypes thatperform well under these stress conditions and utilize such genotypes as a source of genetic diversityfor rice breeding.Keywords:genetic diversity; photosynthesis; heat shock protein
650 $aArroz
650 $aFotossíntese
650 $aResposta da Planta
653 $aDiversidade genética
700 1 $aROMA-BURGOS, N.
700 1 $aNOLDIN, J. A.
700 1 $aVIANA, V. E.
700 1 $aOLIVEIRA, C. de
700 1 $aLAMEGO, F. P.
700 1 $aAVILA, L. A.
773 $tAgriculture$gv. 11, n. 1, 9-11010009, Jan. 2021.
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Embrapa Pecuária Sul (CPPSUL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
23/09/2008 |
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Data da última atualização: |
23/09/2008 |
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Autoria: |
CARES, J. E.; ANDRADE, E. P. |
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Título: |
The potential of soil nematodes as a tool for monitoring sustainability in Amazonian land use systems. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Nematodes are small invertebrate animals, known as the most abundant metazoan on earth.
Soil nematode community includes five major trophic groups: plant parasites (PP), bacteriovores
(BF), fungivores (FF), predators (PR) and omnivores (OM). Regardless functional group, all of
them contribute to nutrient cycling and are part of soil food web. The nematodes range from
agricultural pests, as the plant parasites, through beneficial organisms, as the entomopathogenic
that contribute to control agricultural pests. Due to their short life span and different feeding
functions, nematodes reflect environmental changes in their community structure and composition.
Colonizer nematodes, are tolerant to soil disturbance, and their populations increase in conditions
of nutrient enrichment, while persister nematodes prefer stabilized environment with structured
food chain. With aid of ecological measurement tools, nematodes have been used as indicators
of a variety of natural and anthropic environment alterations, as the impact of agricultural
practices, soil contamination with chemical pollutants, and to monitor recovery of degraded
lands. With the objective of evaluating the potential of nematode communities as a tool for
monitoring sustainability of Amazonian land use systems, a survey of soil nematodes was carried
out, as one of the activities of the project Conservation and sustainable management of below
ground biodiversity in Benjamin Constant, upper Solimões river, Amazonas, Brazil. In March
2004, 96 composite soil samples had been collected in six windows, of three different locations:
windows 1-2, in Guanabara II; 3-5, in Nova Aliança; 6, nearby the town of Benjamin Constant.
The sampling comprised six major land use systems (lus): 16 samples from Primary forest (Pf);
06 from Secondary forest (Sf), over ten years; 34 from Short term secondary forest (Ssf), under
10 years; 09 from Agroforestry system (Agf), with a variety of fruit trees; 19 from Crops (Cr),
mainly cassava and bananas; 13 form Pasture (Pa). Spatially, the sampling points were distributed
in a grid with quadrants of 100 x 100 m. Soil samples were collected in the top layer (0-20 cm).
Nematodes had been extracted from 300cc of soil, by sieving and sugar floatation procedures,
formalin fixed, counted, and glycerin infiltrate. Permanent slide mounts were prepared with 100
nematodes randomly picked for generic identification. Eighty-two genera in 36 families were
identified. Regardless lus, the communities were dominated by plant parasites. Nematode
diversity and trophic diversity were higher in Primary and in Secondary forest, and lower in
Pasture, while total abundance was higher in Pasture and Secondary forest. Relative abundance
for each trophic group decreased as follows: PP% (Agf >Ssf>Pa>Pf >Cr>Sf ); FF% (Sf >Pf
>Agf >Cr >Ssf >Pa); BF% (Sf >Cr>Pf > Ssf >Agf >Pa); PR% (Pf>Cr >Sf >Agf >Ssf>Pa); OM%
(Sf>Pa>Pf>Cr>Ssf>Agf). The ratio FF/BF indicates that decomposition was dominated by fungi,
in all lus. For all systems, Maturity and Plant parasite indices were below 2.5, a characteristic of
disturbed systems. The analyses mostly indicated pasture apart from the other lus, and the
Secondary forest and remaining systems (Ssf, Agf, and Cr) tending to the conditions of the
Primary forest. Funded by GEF-UNEP; implemented by TSBF-CIAT. MenosNematodes are small invertebrate animals, known as the most abundant metazoan on earth.
Soil nematode community includes five major trophic groups: plant parasites (PP), bacteriovores
(BF), fungivores (FF), predators (PR) and omnivores (OM). Regardless functional group, all of
them contribute to nutrient cycling and are part of soil food web. The nematodes range from
agricultural pests, as the plant parasites, through beneficial organisms, as the entomopathogenic
that contribute to control agricultural pests. Due to their short life span and different feeding
functions, nematodes reflect environmental changes in their community structure and composition.
Colonizer nematodes, are tolerant to soil disturbance, and their populations increase in conditions
of nutrient enrichment, while persister nematodes prefer stabilized environment with structured
food chain. With aid of ecological measurement tools, nematodes have been used as indicators
of a variety of natural and anthropic environment alterations, as the impact of agricultural
practices, soil contamination with chemical pollutants, and to monitor recovery of degraded
lands. With the objective of evaluating the potential of nematode communities as a tool for
monitoring sustainability of Amazonian land use systems, a survey of soil nematodes was carried
out, as one of the activities of the project Conservation and sustainable management of below
ground biodiversity in Benjamin Constant, upper Solimões river, Amazonas, Brazil... Mostrar Tudo |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 04070naa a2200133 a 4500
001 1314910
005 2008-09-23
008 2008 bl uuuu u00u1 u #d
100 1 $aCARES, J. E.
245 $aThe potential of soil nematodes as a tool for monitoring sustainability in Amazonian land use systems.
260 $c2008
520 $aNematodes are small invertebrate animals, known as the most abundant metazoan on earth. Soil nematode community includes five major trophic groups: plant parasites (PP), bacteriovores (BF), fungivores (FF), predators (PR) and omnivores (OM). Regardless functional group, all of them contribute to nutrient cycling and are part of soil food web. The nematodes range from agricultural pests, as the plant parasites, through beneficial organisms, as the entomopathogenic that contribute to control agricultural pests. Due to their short life span and different feeding functions, nematodes reflect environmental changes in their community structure and composition. Colonizer nematodes, are tolerant to soil disturbance, and their populations increase in conditions of nutrient enrichment, while persister nematodes prefer stabilized environment with structured food chain. With aid of ecological measurement tools, nematodes have been used as indicators of a variety of natural and anthropic environment alterations, as the impact of agricultural practices, soil contamination with chemical pollutants, and to monitor recovery of degraded lands. With the objective of evaluating the potential of nematode communities as a tool for monitoring sustainability of Amazonian land use systems, a survey of soil nematodes was carried out, as one of the activities of the project Conservation and sustainable management of below ground biodiversity in Benjamin Constant, upper Solimões river, Amazonas, Brazil. In March 2004, 96 composite soil samples had been collected in six windows, of three different locations: windows 1-2, in Guanabara II; 3-5, in Nova Aliança; 6, nearby the town of Benjamin Constant. The sampling comprised six major land use systems (lus): 16 samples from Primary forest (Pf); 06 from Secondary forest (Sf), over ten years; 34 from Short term secondary forest (Ssf), under 10 years; 09 from Agroforestry system (Agf), with a variety of fruit trees; 19 from Crops (Cr), mainly cassava and bananas; 13 form Pasture (Pa). Spatially, the sampling points were distributed in a grid with quadrants of 100 x 100 m. Soil samples were collected in the top layer (0-20 cm). Nematodes had been extracted from 300cc of soil, by sieving and sugar floatation procedures, formalin fixed, counted, and glycerin infiltrate. Permanent slide mounts were prepared with 100 nematodes randomly picked for generic identification. Eighty-two genera in 36 families were identified. Regardless lus, the communities were dominated by plant parasites. Nematode diversity and trophic diversity were higher in Primary and in Secondary forest, and lower in Pasture, while total abundance was higher in Pasture and Secondary forest. Relative abundance for each trophic group decreased as follows: PP% (Agf >Ssf>Pa>Pf >Cr>Sf ); FF% (Sf >Pf >Agf >Cr >Ssf >Pa); BF% (Sf >Cr>Pf > Ssf >Agf >Pa); PR% (Pf>Cr >Sf >Agf >Ssf>Pa); OM% (Sf>Pa>Pf>Cr>Ssf>Agf). The ratio FF/BF indicates that decomposition was dominated by fungi, in all lus. For all systems, Maturity and Plant parasite indices were below 2.5, a characteristic of disturbed systems. The analyses mostly indicated pasture apart from the other lus, and the Secondary forest and remaining systems (Ssf, Agf, and Cr) tending to the conditions of the Primary forest. Funded by GEF-UNEP; implemented by TSBF-CIAT.
700 1 $aANDRADE, E. P.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
Download
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