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| Registros recuperados : 17 | |
| Registros recuperados : 17 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
06/03/2014 |
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Data da última atualização: |
04/07/2017 |
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Autoria: |
IQBAL, M.; ASHRAF, M. |
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Afiliação: |
Muhammad Iqbal, Government College University Faisalabad, Department of Botany; Muhammad Ashraf, University of Agriculture Faisalabad, Department of Botany. |
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Título: |
Salt tolerance and regulation of gas exchange and hormonal homeostasis by auxin-priming in wheat. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 48, n. 9, p. 1210-1219, set. 2013. |
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Idioma: |
Inglês |
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Notas: |
Título em português: Tolerância ao sal e regulação de trocas gasosas e da homeostase hormonal pelo condicionamento osmótico com auxinas em trigo. |
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Conteúdo: |
The objective of this work was to assess the regulatory effects of auxin‑priming on gas exchange and hormonal homeostasis in spring wheat subjected to saline conditions. Seeds of MH‑97 (salt‑intolerant) and Inqlab‑91 (salt‑tolerant) cultivars were subjected to 11 priming treatments (three hormones x three concentrations + two controls) and evaluated under saline (15 dS m‑1) and nonsaline (2.84 dS m‑1) conditions. The priming treatments consisted of: 5.71, 8.56, and 11.42 × 10‑4 mol L‑1 indoleacetic acid; 4.92, 7.38, and 9.84 × 10‑4 mol L‑1 indolebutyric acid; 4.89, 7.34, and 9.79 × 10‑4 mol L‑1 tryptophan; and a control with hydroprimed seeds. A negative control with nonprimed seeds was also evaluated. All priming agents diminished the effects of salinity on endogenous abscisic acid concentration in the salt‑intolerant cultivar. Grain yield was positively correlated with net CO2 assimilation rate and endogenous indoleacetic acid concentration, and it was negatively correlated with abscisic acid and free polyamine concentrations. In general, the priming treatment with tryptophan at 4.89 × 10‑4 mol L‑1 was the most effective in minimizing yield losses and reductions in net CO2 assimilation rate, under salt stress conditions. Hormonal homeostasis increases net CO2 assimilation rate and confers tolerance to salinity on spring wheat. |
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Palavras-Chave: |
Condicionamento de semente; Plant growth regulators; Regulação estomatal; Stomatal regulation. |
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Thesagro: |
Regulador de crescimento; Salinidade; Triticum Aestivum. |
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Thesaurus NAL: |
Salinity; Seed priming. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/98590/1/Salt-tolerance-and-regulation.pdf
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Marc: |
LEADER 02362naa a2200253 a 4500
001 1981632
005 2017-07-04
008 2013 bl uuuu u00u1 u #d
100 1 $aIQBAL, M.
245 $aSalt tolerance and regulation of gas exchange and hormonal homeostasis by auxin-priming in wheat.
260 $c2013
500 $aTítulo em português: Tolerância ao sal e regulação de trocas gasosas e da homeostase hormonal pelo condicionamento osmótico com auxinas em trigo.
520 $aThe objective of this work was to assess the regulatory effects of auxin‑priming on gas exchange and hormonal homeostasis in spring wheat subjected to saline conditions. Seeds of MH‑97 (salt‑intolerant) and Inqlab‑91 (salt‑tolerant) cultivars were subjected to 11 priming treatments (three hormones x three concentrations + two controls) and evaluated under saline (15 dS m‑1) and nonsaline (2.84 dS m‑1) conditions. The priming treatments consisted of: 5.71, 8.56, and 11.42 × 10‑4 mol L‑1 indoleacetic acid; 4.92, 7.38, and 9.84 × 10‑4 mol L‑1 indolebutyric acid; 4.89, 7.34, and 9.79 × 10‑4 mol L‑1 tryptophan; and a control with hydroprimed seeds. A negative control with nonprimed seeds was also evaluated. All priming agents diminished the effects of salinity on endogenous abscisic acid concentration in the salt‑intolerant cultivar. Grain yield was positively correlated with net CO2 assimilation rate and endogenous indoleacetic acid concentration, and it was negatively correlated with abscisic acid and free polyamine concentrations. In general, the priming treatment with tryptophan at 4.89 × 10‑4 mol L‑1 was the most effective in minimizing yield losses and reductions in net CO2 assimilation rate, under salt stress conditions. Hormonal homeostasis increases net CO2 assimilation rate and confers tolerance to salinity on spring wheat.
650 $aSalinity
650 $aSeed priming
650 $aRegulador de crescimento
650 $aSalinidade
650 $aTriticum Aestivum
653 $aCondicionamento de semente
653 $aPlant growth regulators
653 $aRegulação estomatal
653 $aStomatal regulation
700 1 $aASHRAF, M.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 48, n. 9, p. 1210-1219, set. 2013.
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Embrapa Unidades Centrais (AI-SEDE) |
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