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| Registros recuperados: 33 | |
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| Undurraga M,Pedro L; Olaeta C,José A; Cancino,Cristian. |
| There is some controversy regarding the respiratory pattern of loquat (Eriobotrya japonica [Thunb.] Lindl.). Thus in order to provide information on this aspect of loquat, fruit of 50-70 g, from cv. Golden Nugget were harvested in four stages of maturity: green (BBCH 709), color break (BBCH 801), yellow (BBCH 807), and orange (BBCH 809). The parameters evaluated in each stage were: soluble solids, titratable acidity, respiration, ethylene generation, and activity of the enzymes pectin methyl esterase (PME), peroxidase, polyphenoloxidase (PPO), polygalacturonase (PG), and cellulose, and the soluble solids:acidity ratio was calculated. The results show that ethylene concentration increased at the time of color break, which was not the case for the change in... |
| Tipo: Journal article |
Palavras-chave: Color skin; Peroxidase; CO2; Fruit quality; Polygalacturonase. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400005 |
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| Martos,María Alicia; Zubreski,Emilce Roxana; Combina,Mariana; Garro,Oscar Alfredo; Hours,Roque Alberto. |
| The objective of the present study was the isolation of a yeast strain, from citrus fruit peels, able to produce a polygalacturonase by submerged fermentation with maceration activity of raw cassava roots. Among 160 yeast strains isolated from citrus peels, one strain exhibited the strongest pectinolytic activity. This yeast was identified as Wickerhamomyces anomalus by 5.8S-ITS RFLP analysis and confirmed by amplification of the nucleotide sequence. The yeast produced a polygalacturonase (PG) in Erlenmeyer shake flasks containing YNB, glucose, and citrus pectin. PG synthesis occurred during exponential growth phase, reaching 51 UE.mL-1 after 8 hours of fermentation. A growth yield (Yx/s) of 0.43 gram of cell dry weight per gram of glucose consumed was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wickerhamomyces anomalus; Polygalacturonase; Maceration; Cassava. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612013000200018 |
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| Andrade,Marcela Vicente Vieira de; Delatorre,Andréia Boechat; Ladeira,Silvania Alves; Martins,Meire Lelis Leal. |
| Polygalacturonase production by the thermophilic Bacillus sp. SMIA-2 cultivated in liquid cultures containing 0.5% (w/v) apple pectin and supplemented with 0.3% (w/v) corn steep liquor, reached its maximum after 36 hours with levels of 39 U.mL-1. The increase in apple pectin and corn steep liquor concentrations in the medium from 0.5 and 0.3%, respectively, to 0.65%, markedly affected the production of polygalacturonase, whose activity increased four times, reaching a maximum of 150.3 U.mL-1. Studies on polygalacturonase characterization revealed that the optimum temperature of this enzyme was between 60-70 °C. Thermostability profile indicated that the enzyme retained about 82 and 63% of its activity at 60 and 70 °C, respectively, after 2 hours of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polygalacturonase; Corn steep liquor; Bacillus sp.; Thermophilic bacterium. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000100031 |
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| Ribon,Andréa de O.B.; Ribeiro,João Batista; Gonçalves,Daniel B.; Queiroz,Marisa V. de; Araújo,Elza F. de. |
| Previous reports have described pgg2, a polygalacturonase-encoding gene of Penicillium griseoroseum, as an attractive model for transcriptional regulation studies, due to its high expression throughout several in vitro growth conditions, even in the presence of non-inducing sugars such as sucrose. A search for regulatory motifs in the 5' upstream regulatory sequence of pgg2 identified a putative CCAAT box that could justify this expression profile. This element, located 270 bp upstream of the translational start codon, was tested as binding target for regulatory proteins. Analysis of a 170 bp promoter fragment by electrophoretic mobility shift assay (EMSA) with nuclear extracts prepared from mycelia grown in pectin-containing culture medium revealed a high... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Penicillium griseoroseum; Polygalacturonase; 5' upstream regulatory sequence; Electrophoretic mobility shift assay. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100019 |
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| 高橋, 裕司; 井熊, 武志; 匂坂, 慶子; 斉藤, 泉; 髙澤, 俊英; TAKAHASHI, Yuji; IKUMA, Takeshi; SAGISAKA, Keiko; SAITO, Izumi; TAKASAWA, Toshihide. |
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Palavras-chave: Sclerotinia borealis; 好冷菌; 雪腐菌核病菌; ポリガラクツロナーゼ; 細胞壁分解酵素; Psychrophile; Snow mold; Cell wall degrading enzyme; Polygalacturonase. |
| Ano: 2002 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/120 |
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| 渡辺, 剛志; 波川, 啓土; 斉藤, 泉; 髙澤, 俊英; WATANABE, Tsuyoshi; NAMIKAWA, Yoshitada; SAITO, Izumi; TAKASAWA, Toshihide. |
| 低温性通性雪腐菌核病菌Sclerotinia trifoliorum の低温適応現象を解明するために, 5℃及び20℃で産生するポリガラクツロナーゼ(PGase) 活性の性質を調べた｡ S. trifoliorum のアルファルファ培地での培養は5℃では160日間(最適培養日数), 20℃では45日間(最適培養日数) 行った｡ 5℃及び20℃培養粗抽出液のPGase 活性は, それぞれ30.8±0.4 U/mL (抽出体積462mL, Total activity 14 200U), 36.5±0.9 U/mL (抽出体積454mL, Total activity 16 600U) であり, 低温 においてもPGase 産生量が著しく低下しないことがわかった｡これら粗抽出液をBio-Gel P-6 DG ゲル濾過クロマトグラフィーによる脱塩操作後に, 5℃及び20℃培養脱塩画分のPGase 活性の性質を調べた｡温度依存性については, 最適温度は5℃及び20℃培養PGase 活性ともに50℃であり, 50℃での活性に対する各温度での相対活性によって両者を較べると, それらの曲線は両者でほぼ一致した｡温度安定性については, 残存活性で比較すると, 5℃培養PGase 活性は15℃～35℃において僅かであるが20℃培養のものにくらべて不安定性を示した｡一方, 45～55℃では若干の安定性を示した｡pH 依存性については, ５℃培養PGase 活性の最適pH は4.5であり, 20℃培養は4.0であった｡従って, これらの結果は5℃及び20℃培養によって産生された各々のPGase アイソザイムが異なることを示した｡ In order to clarify cold adaptation phenomenon of... |
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Palavras-chave: Sclerotinia trifoliorum; 低温菌; ポリガラクツロナーゼ; 低温適応; 細胞壁分解酵素; Sclerotinia trifoliorum; Psychrotroph; Polygalacturonase; Cold adaptaition; Cell wall degrading enzyme. |
| Ano: 2004 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/102 |
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| 高橋, 裕司; 井熊, 武志; 匂坂, 慶子; 斉藤, 泉; 髙澤, 俊英; TAKAHASHI, Yuji; IKUMA, Takeshi; SAGISAKA, Keiko; SAITO, Izumi; TAKASAWA, Toshihide. |
| CM-Toyopearl陽イオン交換カラムクロマトグラフィーおよびSephacryl S-200ゲルろ過カラ ムクロマトグラフィーによって、常温性菌核病菌Sclerotinia sclerotiorumの20℃培養抽出物 のポリガラクツロナーゼ活性画分からポリガラクツロナーゼⅠを単離した。ポリガラクツ ロナーゼⅠ精製標品(P4-4-2)の比活性は3 662U/mgであり、粗抽出液から全体として116倍に 精製した。精製標品はポリアクリルアミドゲル電気泳動によって、均一であることが示さ れた。また、SDS存在下ポリアクリルアミドゲル電気泳動によって本酵素の分子質量は 39.8±1.10kDa(S.E.)、さらに等電点電気泳動によって本酵素の等電点はpH8.70と見積もられた。 Polygaracturonasehas been isolated from the mesophilic white mold Sclerotinia Sclerotiorum by cation-exchange chromatography on a column of CM-Toyopearl followed by gel filtration on a column of Sephacryl S-200. Purified enzyme preparation(P4-4-2) had a specific activity of 3 662 units per mg of protein, that is, 116-fold purification over the crude extract of the wheat bran culture of the mesophilic fungus S.... |
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Palavras-chave: Sclerotinia sclerotiorum; 常温菌; 菌核病菌; ポリガラクツロナーゼ; 細胞壁分解酵素; Mesophile; White mold; Polygalacturonase; Cell wall degrading enzyme. |
| Ano: 2002 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/106 |
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| 竹内, 宏治; 井熊, 武志; 匂坂, 慶子; 斉藤, 泉; 髙澤, 俊英; TAKEUCHI, Kouji; IKUMA, Takeshi; SAGISAKA, Keiko; SAITO, Izumi; TAKASAWA, Toshihide. |
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Palavras-chave: ポリガラクツロナーゼ; 低温適応; 好冷菌; Sclerotinia borealis; Sclerotinia sclerotiorum; Polygalacturonase; Cold adaptation; Psychrophile. |
| Ano: 2002 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/121 |
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| Registros recuperados: 33 | |
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