Mechanizm starzenia sie nasiona w aspekcie ich dlugotrwalego przechowywania

• Autorzy: Gorecki R J , Kulka K. , Puchalski J.
• Języki publikacji: PL

Abstrakty

PL

Wiele danych eksperymentalnych wskazuje, że nie ma uniwersalnego mechanizmu starzenia się nasion. Wydaje się, że szybkość i mechanizm starzenia nasion zależy od współdziałania wielu czynników wywołujących w konsekwencji stres tzw. oksydacyjny, który polega na doprowadzeniu do wyraźnej przewagi reakcji prooksydacyjnych nad reakcjami antyoksydacyjnymi. Do czynników kształtujących proces starzenia się nasion, a tym samym stres oksydacyjny, należy zaliczyć warunki przechowywania nasion oraz sposób wiązania wody w nasionach, wytwarzania aktywnych form tlenu i wolnych rodników, procesy peroksydacyjne (zwłaszcza fosfolipidów), reakcje Maillarda oraz aktywność enzymów. Procesy te omówiono w niniejszym opracowaniu w aspekcie długoterminowego przechowywania nasion.

EN

Numerous experimental data proved, that the universal mechanism of seed ageing does not exist. It seems, that the rate and mechanism of seed ageing derive from the complex activity of many factors consequently producing so-called oxidation stress, which consists in evident domination of pro-oxidation processes over the anti-oxidation processes. Seed storage conditions, the way of water binding in seeds, production of active oxygen forms and free radicals, peroxidation processes (especially phospholipids), Maillard's reactions and enzyme activity might be considered as the factors inducing the process of ageing seeds and consequently their oxidation stress. All these processes were discussed in the paper in aspect of long-term seed storage.

Słowa kluczowe

PL

procesy peroksydacyjne; starzenie sie nasion; nasiona; reakcja Maillarda; stres oksydacyjny; nasiennictwo; przechowywanie dlugoterminowe; uszkodzenia nasion; wolne rodniki; fizjologia roslin

• Wydawca: -
• Czasopismo: Zeszyty Problemowe Postępów Nauk Rolniczych
• Rocznik: 1998
• Tom: 463
• Opis fizyczny: s.191-209,rys.,tab.,bibliogr.

Twórcy

autor

Gorecki R J

• Akademia Rolniczo-Techniczna, 10-718 Olsztyn

autor

Kulka K.

autor

Puchalski J.

Bibliografia

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