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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Tabuleiros Costeiros. |
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Data corrente: |
17/09/1996 |
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Data da última atualização: |
17/09/1996 |
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Autoria: |
BODDEY, R. M.; DOBEREINER, J. |
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Título: |
Nitrogen fixation associated with grasses and cereals: Recent progress and perspectives for the future. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Fertilizer Research, Dordrecht, v. 42, p. 241-250, 1995. |
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Idioma: |
Inglês |
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Conteúdo: |
Over the last 20 years many new species of N2-fixing bacteria have been discovered in association with grasses, cereals and other non-nodulating crops. Virtually all of these bacteria are microaerophylic, fixing N2 only in the presence of low partial pressures of oxygen. Until a few years ago much attention was focussed on members the genus Azospirillum and it was assumed that N2 fixation was restricted to the rhizosphere or rhizoplane of the host plants. Through the use of N balance and 15N techniques it has been shown that in the case of lowland rice, several tropical pasture grasses and especially sugar cane, the contributions of biological N2 fixation (BNF) are of agronomic significance. More detailed study of the N2-fixing bacteria associated with sugar cane (Acetobacter diazotrophicus and Herbaspirillum spp.) has shown that they occur in high numbers not only in roots of this crop but also in the stems, leaves and trash but are rarely found in the soil. Some of these endophytic diazotrophs have now also been found in forage grasses, cereals, sweet potato and cassava, although evidence of significant BNF contributions is still lacking. The identification of these endophytic diazotrophs as the organisms probably responsible for the high contributions of N2 fixation observed in sugar cane suggests that it may be possible to attain significant BNF contributions in some other gramineae and perhaps root crops. |
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Palavras-Chave: |
Acetabacter diazotrophicus; Acetobacter diazotrophicus; BNF; Cana-de-açúcar; Cereals; FBN; Fixacao; Fixação biologica de nitrogênio; Fixation; Nitrogen fixing bacteria; Planta graminea; Sugar cane. |
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Thesagro: |
Cereal; Gramínea; Nitrogênio. |
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Thesaurus Nal: |
Azospirillum; grasses; Herbaspirillum; nitrogen. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02417naa a2200361 a 4500
001 1620880
005 1996-09-17
008 1995 bl --- 0-- u #d
100 1 $aBODDEY, R. M.
245 $aNitrogen fixation associated with grasses and cereals$bRecent progress and perspectives for the future.
260 $c1995
520 $aOver the last 20 years many new species of N2-fixing bacteria have been discovered in association with grasses, cereals and other non-nodulating crops. Virtually all of these bacteria are microaerophylic, fixing N2 only in the presence of low partial pressures of oxygen. Until a few years ago much attention was focussed on members the genus Azospirillum and it was assumed that N2 fixation was restricted to the rhizosphere or rhizoplane of the host plants. Through the use of N balance and 15N techniques it has been shown that in the case of lowland rice, several tropical pasture grasses and especially sugar cane, the contributions of biological N2 fixation (BNF) are of agronomic significance. More detailed study of the N2-fixing bacteria associated with sugar cane (Acetobacter diazotrophicus and Herbaspirillum spp.) has shown that they occur in high numbers not only in roots of this crop but also in the stems, leaves and trash but are rarely found in the soil. Some of these endophytic diazotrophs have now also been found in forage grasses, cereals, sweet potato and cassava, although evidence of significant BNF contributions is still lacking. The identification of these endophytic diazotrophs as the organisms probably responsible for the high contributions of N2 fixation observed in sugar cane suggests that it may be possible to attain significant BNF contributions in some other gramineae and perhaps root crops.
650 $aAzospirillum
650 $agrasses
650 $aHerbaspirillum
650 $anitrogen
650 $aCereal
650 $aGramínea
650 $aNitrogênio
653 $aAcetabacter diazotrophicus
653 $aAcetobacter diazotrophicus
653 $aBNF
653 $aCana-de-açúcar
653 $aCereals
653 $aFBN
653 $aFixacao
653 $aFixação biologica de nitrogênio
653 $aFixation
653 $aNitrogen fixing bacteria
653 $aPlanta graminea
653 $aSugar cane
700 1 $aDOBEREINER, J.
773 $tFertilizer Research, Dordrecht$gv. 42, p. 241-250, 1995.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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