Limited phytate hydrolysis by endogenous phytase of sesame seed during germination

K. Żyła; T. Fortuna; M. Mika; M. Czubak

Limited phytate hydrolysis by endogenous phytase of sesame seed during germination

in Recent advances of research in antinutritional factors in legume seeds and oilseeds

Autor:innen:

K. Żyła

K. Żyła ¹Department of Food Biotechnology, University of Agriculture in Kraków, 29-Listopada Ave 46, 31-425 Kraków, Poland

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T. Fortuna

T. Fortuna ²Department of Food Analysis and Food Quality Assessment, University of Agriculture in Kraków, ul. Balicka 122, 30-149 Kraków, Poland

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M. Mika

M. Mika ¹Department of Food Biotechnology, University of Agriculture in Kraków, 29-Listopada Ave 46, 31-425 Kraków, Poland

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, und

M. Czubak

M. Czubak ¹Department of Food Biotechnology, University of Agriculture in Kraków, 29-Listopada Ave 46, 31-425 Kraków, Poland

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Art:: Kapitel

Seiten:: 347–350

DOI:: https://doi.org/10.3920/978-90-8686-524-6_056

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It is well know that germination improves the nutritional quality of oilseeds. The objective of this work was to determine changes in phytase activity, in the chemical composition and the in vitro nutrient digestibility of germinated sesame seed (Sesamum indicum L.). The seed was germinated for 12, 24, 36, 48 and 60 h, at 25, 30, 35, 40, and 45 °C. Phytase activity was measured colourimetrically following cellulase and xylanase assisted extraction. Inositol phosphates were determined by HPLC and in vitro digestibility was measured by peptic and pancreatic digestion of samples.

The sesame phytase activity increased from 1.4 FTU/g in raw seeds to 5.0 FTU/g after 36 h of germination. The optimal germination temperature was 30 °C at pH 5,5. As a result of germination the sesame seeds fat and carbohydrates content decreased from 47 to 40 %, and from 6.05 to 2.03 %, respectively. However protein level was not altered (27 vs. 28 %). Total phosphorus, calcium and magnesium were unchanged, and the inorganic seed phosphorus increased from 0.6 to 1.4 mg/g. During germination IP6 concentration of IP6 decreased slightly (from 38.2 to 36.4 μM/g ddb¹), the decrease in IP5 concentration was not significant, and only minor amounts of IP4 were produced. In the in vitro digestion test seed germination improved the digestibility of phosphorus, calcium, magnesium and carbohydrates, but did not affect protein digestibility.

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Recent advances of research in antinutritional factors in legume seeds and oilseeds

Proceedings of the fourth international workshop on antinutritional factors in legume seeds and oilseeds

Reihe: EAAP Scientific Series, Band: 110

Cover Recent advances of research in antinutritional factors in legume seeds and oilseeds

ISBN:: 9789086865246

Verleger:: Wageningen Academic

Print-Publikationsdatum:: 10 Oct 2004

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- Biowissenschaften
  - Allgemein
  - Tiere und Veterinärmedizin

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Limited phytate hydrolysis by endogenous phytase of sesame seed during germination

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Recent advances of research in antinutritional factors in legume seeds and oilseeds

Proceedings of the fourth international workshop on antinutritional factors in legume seeds and oilseeds

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