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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
10/04/2015 |
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Data da última atualização: |
10/04/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SCHMITZ, J. D.; BONHOMME, M.; COCHARD, H.; HERTER, F. G.; LEITE, G. B.; REGNARD, J.; LAURI, P. |
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Título: |
Are the effects of winter temperatures onspring budburst mediated by the bud water status or related to a whole-shoot effect? Insights in the apple tree. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Trees, Berlim, 2014. |
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Idioma: |
Português |
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Conteúdo: |
The effects of winter temperatures, i.e., during
dormancy, on shoot architecture are well known with budburst
preferentially in the distal or the proximal part of the
parent shoot in cold and mild winter conditions, respectively.
However, the link with the overwintering bud water status is
still scarcely documented. Our study was developed on four
apple (Malus domestica Borkh.) cultivars covering a range of
chilling requirements from low (?Condessa?) to medium
(?Granny Smith?) and high (?Royal Gala?, ?Starkrimson?),
and maintained in either cold (1,428 h below 7.2 C) or mild
(99 h below 7.2 C) fluctuating winter temperatures. Our aim
was to analyze xylem conductance at the stem-to-bud junction,
and relative water content and water potential of the bud
itself, for buds situated in the distal third of one-year-old
shoots. From dormancy to the pre-budburst stage, xylem
conductance at the stem-to-bud junction increased or
decreased or did not show consistent changes depending on
the cultivar and the winter temperature treatment. Whatever
the cultivar, there were no significant trends across dates for
the effects of winter temperatures on bud water potential and
relative water content. Water potential had negative values,
between -4.35 and -2.24 MPa, across cultivars and winter
temperature treatments without a consistent relationship with
actual spring budburst frequency. These results suggested
that lateral buds were hydraulically isolated from the parent
stem during winter until a few days before budburst. We
discussed that the temperature-related spring budburst was
likely more related to a whole-shoot effect mediated by
hormonal, hydraulics and/or sugar signaling, than to the
individual bud water status during dormancy. MenosThe effects of winter temperatures, i.e., during
dormancy, on shoot architecture are well known with budburst
preferentially in the distal or the proximal part of the
parent shoot in cold and mild winter conditions, respectively.
However, the link with the overwintering bud water status is
still scarcely documented. Our study was developed on four
apple (Malus domestica Borkh.) cultivars covering a range of
chilling requirements from low (?Condessa?) to medium
(?Granny Smith?) and high (?Royal Gala?, ?Starkrimson?),
and maintained in either cold (1,428 h below 7.2 C) or mild
(99 h below 7.2 C) fluctuating winter temperatures. Our aim
was to analyze xylem conductance at the stem-to-bud junction,
and relative water content and water potential of the bud
itself, for buds situated in the distal third of one-year-old
shoots. From dormancy to the pre-budburst stage, xylem
conductance at the stem-to-bud junction increased or
decreased or did not show consistent changes depending on
the cultivar and the winter temperature treatment. Whatever
the cultivar, there were no significant trends across dates for
the effects of winter temperatures on bud water potential and
relative water content. Water potential had negative values,
between -4.35 and -2.24 MPa, across cultivars and winter
temperature treatments without a consistent relationship with
actual spring budburst frequency. These results suggested
that lateral buds were hydraulically isolated from the parent
stem during winter unti... Mostrar Tudo |
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Palavras-Chave: |
Apple; Axillary budburst; Relative water content; Water potential; Winter temperatures; Xylemhydraulic conductance. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02545naa a2200265 a 4500
001 1123619
005 2015-04-10
008 2014 bl uuuu u00u1 u #d
100 1 $aSCHMITZ, J. D.
245 $aAre the effects of winter temperatures onspring budburst mediated by the bud water status or related to a whole-shoot effect? Insights in the apple tree.$h[electronic resource]
260 $c2014
520 $aThe effects of winter temperatures, i.e., during dormancy, on shoot architecture are well known with budburst preferentially in the distal or the proximal part of the parent shoot in cold and mild winter conditions, respectively. However, the link with the overwintering bud water status is still scarcely documented. Our study was developed on four apple (Malus domestica Borkh.) cultivars covering a range of chilling requirements from low (?Condessa?) to medium (?Granny Smith?) and high (?Royal Gala?, ?Starkrimson?), and maintained in either cold (1,428 h below 7.2 C) or mild (99 h below 7.2 C) fluctuating winter temperatures. Our aim was to analyze xylem conductance at the stem-to-bud junction, and relative water content and water potential of the bud itself, for buds situated in the distal third of one-year-old shoots. From dormancy to the pre-budburst stage, xylem conductance at the stem-to-bud junction increased or decreased or did not show consistent changes depending on the cultivar and the winter temperature treatment. Whatever the cultivar, there were no significant trends across dates for the effects of winter temperatures on bud water potential and relative water content. Water potential had negative values, between -4.35 and -2.24 MPa, across cultivars and winter temperature treatments without a consistent relationship with actual spring budburst frequency. These results suggested that lateral buds were hydraulically isolated from the parent stem during winter until a few days before budburst. We discussed that the temperature-related spring budburst was likely more related to a whole-shoot effect mediated by hormonal, hydraulics and/or sugar signaling, than to the individual bud water status during dormancy.
653 $aApple
653 $aAxillary budburst
653 $aRelative water content
653 $aWater potential
653 $aWinter temperatures
653 $aXylemhydraulic conductance
700 1 $aBONHOMME, M.
700 1 $aCOCHARD, H.
700 1 $aHERTER, F. G.
700 1 $aLEITE, G. B.
700 1 $aREGNARD, J.
700 1 $aLAURI, P.
773 $tTrees, Berlim, 2014.
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Registro Completo
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
09/06/2011 |
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Data da última atualização: |
09/06/2011 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Circulação/Nível: |
-- - -- |
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Autoria: |
DORTZBACH, D.; LEIS, C. M.; COMIN, J. J.; BELLI FILHO, P. |
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Afiliação: |
Epagri |
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Título: |
Teores de potássio, cálcio e magnésio no solo após aplicação de dejeto líquido e cama sobreposta de suínos no cultivo de milho. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In: SIMPÓSIO INTERNACIONAL SOBRE GERENCIAMENTO DE RESÍDUOS DE ANIMAIS USO DOS RESÍDUOS DA PRODUÇÃO ANIMAL COMO FERTILIZANTE, 2009, Florianópolis, SC. Anais... Florianópolis, SC: SIGERA, 2009. p. 378-382. |
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Idioma: |
Português |
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Conteúdo: |
The use of dejections aiming the nutrients cycling, the adoption of the direct
plantation system (SPD) and the cultures rotation can be considered essential
practices to the sustainability of agricultural production. The use of swine dejections
in correct doses and handling is an alternative in agricultural properties, allowing the
development of integrated systems of production, with lower cost and risk of
damages to the environment. This study aimed to evaluate the chemical alterations
of K, Ca and Mg of a typical Yellow Red Rhodic in the city of Braço do Norte, Santa
Catarina state, due to the fertilization with liquid swine manure or chemical
fertilization, in the depths of zero to 15 cm, 15 to 30 cm, 30 to 45 cm and 45 to 60
cm. The recommended N and the double of the dose were supplied to the cultures.
There was a difference in the proportions of K, Ca and Mg of the ground during the
culture of the maize. Both the proportions of K and Ca and Mg were higher in the
superficial layer of the ground, diminishing according to the depth. In general, the
overlapping litter 2x treatment presented the highest values for the nutrients.
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Palavras-Chave: |
Argissolo; Argissolo Vermelho Amarelo; Aveia preta; Cation; Dejeto suíno; Fertility; NPK. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01907naa a2200205 a 4500
001 1077394
005 2011-06-09
008 2009 bl uuuu u00u1 u #d
100 1 $aEpagri
245 $aTeores de potássio, cálcio e magnésio no solo após aplicação de dejeto líquido e cama sobreposta de suínos no cultivo de milho.
260 $c2009
520 $aThe use of dejections aiming the nutrients cycling, the adoption of the direct plantation system (SPD) and the cultures rotation can be considered essential practices to the sustainability of agricultural production. The use of swine dejections in correct doses and handling is an alternative in agricultural properties, allowing the development of integrated systems of production, with lower cost and risk of damages to the environment. This study aimed to evaluate the chemical alterations of K, Ca and Mg of a typical Yellow Red Rhodic in the city of Braço do Norte, Santa Catarina state, due to the fertilization with liquid swine manure or chemical fertilization, in the depths of zero to 15 cm, 15 to 30 cm, 30 to 45 cm and 45 to 60 cm. The recommended N and the double of the dose were supplied to the cultures. There was a difference in the proportions of K, Ca and Mg of the ground during the culture of the maize. Both the proportions of K and Ca and Mg were higher in the superficial layer of the ground, diminishing according to the depth. In general, the overlapping litter 2x treatment presented the highest values for the nutrients.
653 $aArgissolo
653 $aArgissolo Vermelho Amarelo
653 $aAveia preta
653 $aCation
653 $aDejeto suíno
653 $aFertility
653 $aNPK
773 $tIn: SIMPÓSIO INTERNACIONAL SOBRE GERENCIAMENTO DE RESÍDUOS DE ANIMAIS USO DOS RESÍDUOS DA PRODUÇÃO ANIMAL COMO FERTILIZANTE, 2009, Florianópolis, SC. Anais... Florianópolis, SC: SIGERA, 2009. p. 378-382.
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