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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
08/07/2013 |
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Data da última atualização: |
19/05/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PEREIRA, M. E. C.; TIEMAN, D. M.; SARGENT, S. A.; KLEE, H. J.; HUBER, D. J. |
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Afiliação: |
MARCIO EDUARDO CANTO PEREIRA, CNPMF; DENISE M. TIEMAN, University of Florida; STEVEN A. SARGENT, University of Florida; HARRY J. KLEE, University of Florida; DONALD J. HUBER, University of Florida. |
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Título: |
Volatile profiles of ripening West Indian and Guatemalan-West Indian avocado cultivars as affected by aqueous 1-methylcyclopropene. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Postharvest Biology and Technology, v.80, p.37-46, 2013. |
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Idioma: |
Português |
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Conteúdo: |
Separate experiments were conducted with three major commercial avocado (Persea americana Mill.) cultivars grown in Florida: Simmonds (early-season, West Indian race); Booth 7 (mid-season, Guatemalan-West Indian hybrid); and Monroe (late-season, Guatemalan-West Indian hybrid). Fruit were harvested at preclimacteric stage and left untreated (Control) or treated 24 h after harvest with aqueous 1-methylcyclopropene (1-MCP) at 1.39 (treatment M1) or 2.77 mol L1 a.i. (treatment M2) (75 or 150 g L1) for 1 min at 20 C. Whole fruit ripening was monitored at 20 C/92% 3% R.H. and based on whole fruit firmness, respiration and ethylene evolution. Fruit volatiles were assessed at preclimacteric (24 h after harvest), mid-ripe (half of initial fruit firmness) and ripe maturity stages, from 100 g of chopped pulp using a purge and trap system. Untreated, firmer fruit Monroe (268 N at harvest) ripened within 12 d of harvest while softer fruit Simmonds (118 N) ripened within only 6 d. 1-MCP treatment extended ripening time from 33% (M1) to 83% (M2). All fruit softened normally, indicating the potential benefits of aqueous 1-MCP as a postharvest treatment for avocado when applied at these concentrations. Volatile profiles differed among the three cultivars with several compounds detected in only one cultivar, results that may contribute to a potential identification of the origin of the cultivar based on fruit volatile composition. The West Indian cultivar Simmonds had much higher emission of hexanal (preclimacteric fruit) and cis-3-hexenal and cis-3-hexen-1-ol (ripe fruit) than the uatemalan-West Indian hybrids Booth 7 and Monroe. On the other hand, these latter hybrids had much higher levels of alkanes than Simmonds. Treatment with 1-MCP increased emissions of alkanes during ripening of Booth 7 and Monroe. Total volatiles of avocado decreased during ripening mainly due to the significant reduction of sesquiterpenes, the main group of volatiles in all cultivars at harvest (Simmonds, 53%; Booth 7, 78%; Monroe, 66%). -Caryophyllene was the major compound at harvest, but decreased to less than 2% in ripe fruit, at which point most sesquiterpenes were not detected. Among the 10 sesquiterpenes commonly found in the avocado cultivars in this study, only -Copaene had significantly higher emissions in mid-ripe fruit treated with the higher concentration of 1-MCP (2.77 mol L1 a.i.), suggesting that ethylene participates in the regulation of this sesquiterpene. MenosSeparate experiments were conducted with three major commercial avocado (Persea americana Mill.) cultivars grown in Florida: Simmonds (early-season, West Indian race); Booth 7 (mid-season, Guatemalan-West Indian hybrid); and Monroe (late-season, Guatemalan-West Indian hybrid). Fruit were harvested at preclimacteric stage and left untreated (Control) or treated 24 h after harvest with aqueous 1-methylcyclopropene (1-MCP) at 1.39 (treatment M1) or 2.77 mol L1 a.i. (treatment M2) (75 or 150 g L1) for 1 min at 20 C. Whole fruit ripening was monitored at 20 C/92% 3% R.H. and based on whole fruit firmness, respiration and ethylene evolution. Fruit volatiles were assessed at preclimacteric (24 h after harvest), mid-ripe (half of initial fruit firmness) and ripe maturity stages, from 100 g of chopped pulp using a purge and trap system. Untreated, firmer fruit Monroe (268 N at harvest) ripened within 12 d of harvest while softer fruit Simmonds (118 N) ripened within only 6 d. 1-MCP treatment extended ripening time from 33% (M1) to 83% (M2). All fruit softened normally, indicating the potential benefits of aqueous 1-MCP as a postharvest treatment for avocado when applied at these concentrations. Volatile profiles differed among the three cultivars with several compounds detected in only one cultivar, results that may contribute to a potential identification of the origin of the cultivar based on fruit volatile composition. The West Indian cultivar Simmonds had much higher emission of ... Mostrar Tudo |
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Thesagro: |
Abacate. |
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Thesaurus Nal: |
Avocados. |
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Categoria do assunto: |
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Marc: |
LEADER 03082naa a2200193 a 4500
001 1961551
005 2023-05-19
008 2013 bl uuuu u00u1 u #d
100 1 $aPEREIRA, M. E. C.
245 $aVolatile profiles of ripening West Indian and Guatemalan-West Indian avocado cultivars as affected by aqueous 1-methylcyclopropene.$h[electronic resource]
260 $c2013
520 $aSeparate experiments were conducted with three major commercial avocado (Persea americana Mill.) cultivars grown in Florida: Simmonds (early-season, West Indian race); Booth 7 (mid-season, Guatemalan-West Indian hybrid); and Monroe (late-season, Guatemalan-West Indian hybrid). Fruit were harvested at preclimacteric stage and left untreated (Control) or treated 24 h after harvest with aqueous 1-methylcyclopropene (1-MCP) at 1.39 (treatment M1) or 2.77 mol L1 a.i. (treatment M2) (75 or 150 g L1) for 1 min at 20 C. Whole fruit ripening was monitored at 20 C/92% 3% R.H. and based on whole fruit firmness, respiration and ethylene evolution. Fruit volatiles were assessed at preclimacteric (24 h after harvest), mid-ripe (half of initial fruit firmness) and ripe maturity stages, from 100 g of chopped pulp using a purge and trap system. Untreated, firmer fruit Monroe (268 N at harvest) ripened within 12 d of harvest while softer fruit Simmonds (118 N) ripened within only 6 d. 1-MCP treatment extended ripening time from 33% (M1) to 83% (M2). All fruit softened normally, indicating the potential benefits of aqueous 1-MCP as a postharvest treatment for avocado when applied at these concentrations. Volatile profiles differed among the three cultivars with several compounds detected in only one cultivar, results that may contribute to a potential identification of the origin of the cultivar based on fruit volatile composition. The West Indian cultivar Simmonds had much higher emission of hexanal (preclimacteric fruit) and cis-3-hexenal and cis-3-hexen-1-ol (ripe fruit) than the uatemalan-West Indian hybrids Booth 7 and Monroe. On the other hand, these latter hybrids had much higher levels of alkanes than Simmonds. Treatment with 1-MCP increased emissions of alkanes during ripening of Booth 7 and Monroe. Total volatiles of avocado decreased during ripening mainly due to the significant reduction of sesquiterpenes, the main group of volatiles in all cultivars at harvest (Simmonds, 53%; Booth 7, 78%; Monroe, 66%). -Caryophyllene was the major compound at harvest, but decreased to less than 2% in ripe fruit, at which point most sesquiterpenes were not detected. Among the 10 sesquiterpenes commonly found in the avocado cultivars in this study, only -Copaene had significantly higher emissions in mid-ripe fruit treated with the higher concentration of 1-MCP (2.77 mol L1 a.i.), suggesting that ethylene participates in the regulation of this sesquiterpene.
650 $aAvocados
650 $aAbacate
700 1 $aTIEMAN, D. M.
700 1 $aSARGENT, S. A.
700 1 $aKLEE, H. J.
700 1 $aHUBER, D. J.
773 $tPostharvest Biology and Technology$gv.80, p.37-46, 2013.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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