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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
13/11/2019 |
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Data da última atualização: |
19/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, T. A.; RESENDE, A. S. de; SILVA, F. F.; MORAES, L. F. D. de; CHAER, G. M. |
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Afiliação: |
UFRRJ; ALEXANDER SILVA DE RESENDE, CNPAB; UFRJ, MACAÉ, RJ; LUIZ FERNANDO DUARTE DE MORAES, CNPAB; GUILHERME MONTANDON CHAER, CNPAB. |
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Título: |
Growth of tree species in coexistence with palisade grass Urochloa brizantha (Hochst. ex a. rich.) Stapf cv. Marandu. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Planta Daninha, v. 37, e019178812, 2019. |
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ISSN: |
1806-9681 |
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DOI: |
10.1590/S0100-83582019370100113 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Crescimento de Espécies Arbóreas em Convivência com Capim-Braquiarão Urochloa brizantha (Hochst. ex A. Rich.) Stapf cv. Marandu. |
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Conteúdo: |
The effect of palisade grass (Urochloa brizantha) was evaluated on the growth of five tree species from the Atlantic Forest biome in Seropédica, RJ, Brasil. This study consisted of five experiments in a completely randomized design. The effect of grass on the growth of Cedrela fissilis, Guazuma ulmifolia, Schinus terebinthifolius, Sapindus saponaria, and Hymenaea courbaril was tested in pots at each experiment. Height, collar diameter, and plant mortality were measured monthly. Shoot and root dry matter of tree species and grass were evaluated at 180 days. A strong interference of palisade grass was observed on the growth of the five studied species. The reduction of growth in height and collar diameter reached 32 and 29% in S. saponaria and 26 and 44% in G. ulmifolia, respectively. Grass interference was even higher on dry matter accumulation, promoting reductions in the shoot that ranged from 48% in H. courbaril to 90% in G. ulmifolia and S. terebinthifolius. Root dry matter of tree species was reduced between 28 and 84% in relation to the control without the presence of grass. The species C. fissilis had a mortality rate of 83% in coexistence with U. brizantha. The other species, except S. saponaria, presented mortality from 15 to 30% under competition. This study evidences the importance of controlling grasses in reforestation projects aiming higher gains in growth and survival of tree species |
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Palavras-Chave: |
Weed competition. |
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Thesagro: |
Cedrela Fissilis; Guazuma Ulmifolia; Hymenaea Courbaril; Schinus Terebinthifolius. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02380naa a2200265 a 4500
001 2114319
005 2019-11-19
008 2019 bl uuuu u00u1 u #d
022 $a1806-9681
024 7 $a10.1590/S0100-83582019370100113$2DOI
100 1 $aSANTOS, T. A.
245 $aGrowth of tree species in coexistence with palisade grass Urochloa brizantha (Hochst. ex a. rich.) Stapf cv. Marandu.$h[electronic resource]
260 $c2019
500 $aTítulo em português: Crescimento de Espécies Arbóreas em Convivência com Capim-Braquiarão Urochloa brizantha (Hochst. ex A. Rich.) Stapf cv. Marandu.
520 $aThe effect of palisade grass (Urochloa brizantha) was evaluated on the growth of five tree species from the Atlantic Forest biome in Seropédica, RJ, Brasil. This study consisted of five experiments in a completely randomized design. The effect of grass on the growth of Cedrela fissilis, Guazuma ulmifolia, Schinus terebinthifolius, Sapindus saponaria, and Hymenaea courbaril was tested in pots at each experiment. Height, collar diameter, and plant mortality were measured monthly. Shoot and root dry matter of tree species and grass were evaluated at 180 days. A strong interference of palisade grass was observed on the growth of the five studied species. The reduction of growth in height and collar diameter reached 32 and 29% in S. saponaria and 26 and 44% in G. ulmifolia, respectively. Grass interference was even higher on dry matter accumulation, promoting reductions in the shoot that ranged from 48% in H. courbaril to 90% in G. ulmifolia and S. terebinthifolius. Root dry matter of tree species was reduced between 28 and 84% in relation to the control without the presence of grass. The species C. fissilis had a mortality rate of 83% in coexistence with U. brizantha. The other species, except S. saponaria, presented mortality from 15 to 30% under competition. This study evidences the importance of controlling grasses in reforestation projects aiming higher gains in growth and survival of tree species
650 $aCedrela Fissilis
650 $aGuazuma Ulmifolia
650 $aHymenaea Courbaril
650 $aSchinus Terebinthifolius
653 $aWeed competition
700 1 $aRESENDE, A. S. de
700 1 $aSILVA, F. F.
700 1 $aMORAES, L. F. D. de
700 1 $aCHAER, G. M.
773 $tPlanta Daninha$gv. 37, e019178812, 2019.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
21/05/2021 |
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Data da última atualização: |
21/05/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MATOS, G. F. de; ROUWS, L. F. M.; ARAUJO, J. L. S. de; BALDANI, J. I. |
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Afiliação: |
GUSTAVO FEITOSA DE MATOS, UFRRJ; LUC FELICIANUS MARIE ROUWS, CNPAB; JEAN LUIZ SIMOES DE ARAUJO, CNPAB; JOSE IVO BALDANI, CNPAB. |
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Título: |
Evolution and function of nitrogen fixation gene clusters in sugarcane associated Bradyrhizobium strains. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Environmental Microbiology, Published Online 15 May 2021. |
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Idioma: |
Inglês |
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Conteúdo: |
Bradyrhizobium spp. are well known to mediate biological nitrogen xation (BNF) as microsymbionts inhabiting nodules on leguminous plants. However, they may also contribute to plant growth via freeliving N2 xation (FLNF) in association with nonlegumes. Notably, several Bradyrhizobium strains from sugarcane roots display FLNF ctivity. Among them, Bradyrhizobium sacchari is a legume symbiotic species, whereas strains AG48 and M12 are non-symbiotic. In the present study, a phylogenomic pproach was applied to study peculiarities of these and other Bradyrhizobium strains with respect to N xation (nif) gene content in order to reveal genetic features that enable FNLF in Bradyrhizobium spp. All FLNF strains carry an ancestral ?non-symbiotic? nifgene cluster (NSC). B. sacchari also contains a second ?symbiotic? nif-gene cluster (SC), a characteristic observed in only three of 156 evaluated genomes. B. sacchari stood out and presented a high level of sequence divergence between individual nif-gene homologues and we discuss scenarios for the evolutionary origin of these clusters. The transcript level of NSC nifH gene increased during FLNF, when compared to symbiotic conditions. The data suggest that sugarcane roots harbor diverse Bradyrhizobium spp. that are genetically adapted to a dynamic environment where leguminous and non-leguminous host plants are alternately available. |
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Palavras-Chave: |
Biological nitrogen fixation; Fabaceae family. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01998naa a2200181 a 4500
001 2131954
005 2021-05-21
008 2021 bl uuuu u00u1 u #d
100 1 $aMATOS, G. F. de
245 $aEvolution and function of nitrogen fixation gene clusters in sugarcane associated Bradyrhizobium strains.$h[electronic resource]
260 $c2021
520 $aBradyrhizobium spp. are well known to mediate biological nitrogen xation (BNF) as microsymbionts inhabiting nodules on leguminous plants. However, they may also contribute to plant growth via freeliving N2 xation (FLNF) in association with nonlegumes. Notably, several Bradyrhizobium strains from sugarcane roots display FLNF ctivity. Among them, Bradyrhizobium sacchari is a legume symbiotic species, whereas strains AG48 and M12 are non-symbiotic. In the present study, a phylogenomic pproach was applied to study peculiarities of these and other Bradyrhizobium strains with respect to N xation (nif) gene content in order to reveal genetic features that enable FNLF in Bradyrhizobium spp. All FLNF strains carry an ancestral ?non-symbiotic? nifgene cluster (NSC). B. sacchari also contains a second ?symbiotic? nif-gene cluster (SC), a characteristic observed in only three of 156 evaluated genomes. B. sacchari stood out and presented a high level of sequence divergence between individual nif-gene homologues and we discuss scenarios for the evolutionary origin of these clusters. The transcript level of NSC nifH gene increased during FLNF, when compared to symbiotic conditions. The data suggest that sugarcane roots harbor diverse Bradyrhizobium spp. that are genetically adapted to a dynamic environment where leguminous and non-leguminous host plants are alternately available.
653 $aBiological nitrogen fixation
653 $aFabaceae family
700 1 $aROUWS, L. F. M.
700 1 $aARAUJO, J. L. S. de
700 1 $aBALDANI, J. I.
773 $tEnvironmental Microbiology, Published Online 15 May 2021.
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