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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
17/08/1993 |
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Data da última atualização: |
17/08/1993 |
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Autoria: |
HASEGAWA, S.; MAIER, V. P. |
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Afiliação: |
USDA, ARS, Fruit & Vegetable Chemistry Laboratory, 263 So. Chester Ave., Pasadena, California 91106, USA. |
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Título: |
Some aspects of citrus biochemistry and juices quality. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Tokyo, Japan: International Society of Citriculture, 1983 |
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Volume: |
v.2 |
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Páginas: |
p.914-918 |
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Idioma: |
Inglês |
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Conteúdo: |
Studies on biosynthesis and biodegradation of citrus bitter compounds are reviewed. Substantial progress has been made in the area of limonoid metabolism. Two metabolic pahyways have been firmly established in Citrus and bacteria, and recently a third one has been found in bacteria. Citrus leaves are one site, if not the only site, of limonoid biosynthesis. The leaves appear to be the major source of limonoids present in fruit and seeds. Certain triethylamine derivatives inhibit the accumulation of limonoids in leaves and appear to reduce limonoid content of the fruit to some extent. Limonoid debittering of navel orange juice serum was successfully demonstrated with bacterial cells immobilized in acrylamide gel. The initail steps of the biosynthetic pathway ofthe B-ring of naringin have been established in grapefruit. Enzymes leading from phenylpyruvate to p-coumarate and also naringin chalcome cyclase have been identified in the fruit. Based on quantitative analyses of naringenin glycosides and the enzymes involved in the pathway during the early stages of fruit development, phenylalanine ammonia-lyase can be singled out as a probable regulatory enzyme in the biosynthesis of flavonoids in grapefruit. Naringinase, particularly in an immobilized form, has a great potential for practical application in reduction of bitterness of citrus juices. |
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Palavras-Chave: |
Debittering. |
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Thesaurus Nal: |
biosynthesis; bitterness; limonin; limonoids; metabolism; naringin. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01964naa a2200241 a 4500
001 1644173
005 1993-08-17
008 1983 bl uuuu u00u1 u #d
100 1 $aHASEGAWA, S.
245 $aSome aspects of citrus biochemistry and juices quality.
260 $c1983
300 $ap.914-918 v.2
490 $vv.2
520 $aStudies on biosynthesis and biodegradation of citrus bitter compounds are reviewed. Substantial progress has been made in the area of limonoid metabolism. Two metabolic pahyways have been firmly established in Citrus and bacteria, and recently a third one has been found in bacteria. Citrus leaves are one site, if not the only site, of limonoid biosynthesis. The leaves appear to be the major source of limonoids present in fruit and seeds. Certain triethylamine derivatives inhibit the accumulation of limonoids in leaves and appear to reduce limonoid content of the fruit to some extent. Limonoid debittering of navel orange juice serum was successfully demonstrated with bacterial cells immobilized in acrylamide gel. The initail steps of the biosynthetic pathway ofthe B-ring of naringin have been established in grapefruit. Enzymes leading from phenylpyruvate to p-coumarate and also naringin chalcome cyclase have been identified in the fruit. Based on quantitative analyses of naringenin glycosides and the enzymes involved in the pathway during the early stages of fruit development, phenylalanine ammonia-lyase can be singled out as a probable regulatory enzyme in the biosynthesis of flavonoids in grapefruit. Naringinase, particularly in an immobilized form, has a great potential for practical application in reduction of bitterness of citrus juices.
650 $abiosynthesis
650 $abitterness
650 $alimonin
650 $alimonoids
650 $ametabolism
650 $anaringin
653 $aDebittering
700 1 $aMAIER, V. P.
773 $tTokyo, Japan: International Society of Citriculture, 1983
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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| Registros recuperados : 1 | |
| 1. |  | SILVA, E. M. da; HASEGAWA, S. Measuring soil water content by using TDR. In: PROJECT of sustainable agricultural development and natural resources conservation in the Brazilian Cerrado: technical report 1994-1999. Planaltina, DF: JICA: Embrapa Cerrados, 2000. Cap. 19. p. 338.381. 1 CD ROM. Editado por Edson Sano.| Biblioteca(s): Embrapa Cerrados. |
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