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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
29/01/2016 |
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Data da última atualização: |
24/02/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LAVINSKY, A. O.; MAGALHAES, P. C.; ÁVILA, R.; GOMES JR. C. C.; CARNEIRO, N. P. |
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Afiliação: |
PAULO CESAR MAGALHAES, CNPMS; NEWTON PORTILHO CARNEIRO, CNPMS. |
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Título: |
Analysis of maize photosyntheis parameters and whole plant oxidative damage under long-term drought. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Advances in Crop Science and Technology, p. 1-6, 2015. |
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DOI: |
http://dx.doi.org/10.4172/2329-8863.S1-007 |
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Idioma: |
Inglês |
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Conteúdo: |
We test if maize maintain yield under long-term drought throught improvement of photosyntheis (A) coupled with up-regulation of the antioxidant system induced by increase in levels of abscisic acid (ABA). Four maize genotypes with constrasting drought tolerance: BRS1010 and 2B710 (sensitive) and DKB 390 and BRS1055 (tolerant) in two soil water levels, field capacity (FC) and water deficit (WD) were used. WD was applied at the pre-flowering stage for 12 days, and oxidative damage was measured as malondialdehyde (MDA) accumulation in whole plant. Plants from tolerant genotypes DKB390 and BRS1055 showed higher A and had no signal of oxidative damage compared to sensitive genotypes 2B710 and BRS1010 under WD, resulting in a higher yield attributes. For our surprising, it was dissociated from up-regulation of the antioxidant system ABA-mediated. In turn, plants from two sensitive genotypes under WD showed compared to FC consistent reduction of A due to mesophyll conductance (gm) limitation. Only WD plants from sensitive genotype BRS1010 presented leaf ABA levels increased related to its counterparts under FC; however, due to the inactivation of catalase activity the oxidative damage control was not effective, resulting a hardly MDA acumulation in both leaves and roots. The maize tolerance under long-term drought is linked to scape of gm decline. |
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Palavras-Chave: |
Fotorrespiração; Mesofilo condutância; Sistema antioxidante. |
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Thesagro: |
Ácido abscísico; Fotossíntese; Milho. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/138044/1/Analysis-maize.pdf
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Marc: |
LEADER 02148naa a2200253 a 4500
001 2035552
005 2016-02-24
008 2015 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.4172/2329-8863.S1-007$2DOI
100 1 $aLAVINSKY, A. O.
245 $aAnalysis of maize photosyntheis parameters and whole plant oxidative damage under long-term drought.$h[electronic resource]
260 $c2015
520 $aWe test if maize maintain yield under long-term drought throught improvement of photosyntheis (A) coupled with up-regulation of the antioxidant system induced by increase in levels of abscisic acid (ABA). Four maize genotypes with constrasting drought tolerance: BRS1010 and 2B710 (sensitive) and DKB 390 and BRS1055 (tolerant) in two soil water levels, field capacity (FC) and water deficit (WD) were used. WD was applied at the pre-flowering stage for 12 days, and oxidative damage was measured as malondialdehyde (MDA) accumulation in whole plant. Plants from tolerant genotypes DKB390 and BRS1055 showed higher A and had no signal of oxidative damage compared to sensitive genotypes 2B710 and BRS1010 under WD, resulting in a higher yield attributes. For our surprising, it was dissociated from up-regulation of the antioxidant system ABA-mediated. In turn, plants from two sensitive genotypes under WD showed compared to FC consistent reduction of A due to mesophyll conductance (gm) limitation. Only WD plants from sensitive genotype BRS1010 presented leaf ABA levels increased related to its counterparts under FC; however, due to the inactivation of catalase activity the oxidative damage control was not effective, resulting a hardly MDA acumulation in both leaves and roots. The maize tolerance under long-term drought is linked to scape of gm decline.
650 $aÁcido abscísico
650 $aFotossíntese
650 $aMilho
653 $aFotorrespiração
653 $aMesofilo condutância
653 $aSistema antioxidante
700 1 $aMAGALHAES, P. C.
700 1 $aÁVILA, R.
700 1 $aGOMES JR. C. C.
700 1 $aCARNEIRO, N. P.
773 $tAdvances in Crop Science and Technology, p. 1-6, 2015.
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Embrapa Milho e Sorgo (CNPMS) |
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| 1. |  | PAULA, L. C.; LEMES, A. C.; VALENCIA-MEJÍA, E.; MOREIRA, B. R.; OLIVEIRA, T. S.; CAMPOS, I. T. N.; NERI, H. F. S.; BRONDANI, C.; GHEDINI, P. C.; BATISTA, K. A.; FERNANDES, K. F. Effect of extrusion and autoclaving on the biological potential of proteins and naturally-occurring peptides from common beans: Antioxidant and vasorelaxant properties Food Chemistry: X, v. 13, 100259, Mar. 2022.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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