Oxalate and ascrobic acid in kiwifruit during growth and storage
2000
Rinallo, C. | Mori, B. (Florence Univ. (Italy). Dipartimento di Biologia Vegetale)
إنجليزي. Changes in the oxalate and ascorbic acid content of berries of kiwifruit (Actinidia deliciosa) cv Hayward were studied during growth on the plant and during storage. During growth the location of oxalate crystals and ascorbic acid in the fruit was determined using polarised light microscopy and histochemical procedures. Oxalate crystals were observed as raphides in idioblast cells, principally in the fruit inner pericarp. The number of idioblast cells and the number of raphides per idioblast increased greatly during fruit growth. Histochemical analysis further showed increasing levels of ascorbic acid during fruit growth, particularly in the inner pericarp. During storage, chemical analysis carried out with enzymatic kits showed that insoluble oxalate was a waste product and that soluble oxalate and ascorbic acid levels decreased significantly over time. Oxalic acid was not formed by catabolism of L-ascorbic acid during storage
اظهر المزيد [+] اقل [-]إيطالي. Nelle bacche di kiwi, le variazioni dei contenuti in ossalato ed in acido ascorbico sono state studiate con osservazioni microscopiche e tecniche istochimiche durante la loro crescita sulla pianta e con analisi chimiche durante la conservazione in frigo per cinque mesi. Le osservazioni microscopiche rivelano che il contenuto in acido ascorbico, il numero degli idioblasti ed il numero dei rafidi per idioblasto aumentano decisamente nel pericarpo interno del frutto durante la sua crescita. Durante il periodo di conservazione le analisi chimiche dimostrano che la frazione insolubile dell'ossalato non e' metabolizzabile, mentre la frazione solubile e l'acido ascorbico si riducono significativamente. Le analisi rivelano altresi' che l'acido ascorbico non e' metabolizzato in acido ossalico perche' durante la conservazione dei frutti i due acidi si riducono contemporaneamente
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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تم تزويد هذا السجل من قبل Istituto di Servizi per il Mercato Agricolo Alimentare