Post harvest diseases fruits and vegetables - Xavier University ...

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FREEDOM PALESTINE FREEDOM PALESTINE FREEDOM PALESTINE Physiological and Biochemical Changes 97 O) d o c o Q. to 0 iiUU 160- 120- 80- _ B Days after harvest / \ Ulnfected Fruit /H^ Fruit softening \ 1 — 5 "^^^^ 1 h-H 1 h—' 0 1 2 3 4 5 6 7 8 9 Days after harvest Fig. 20. Ethylene evolution (A) and respiration rates (B) of avocado fruit infected by Fusarium solani in comparison to uninfected fruit. (Reproduced from Zauberman and Schiffmann-Nadel, 1974 with permission of the American Phytopathological Society). http://arab2000.forumpro.fr
FREEDOM PALESTINE FREEDOM PALESTINE FREEDOM PALESTINE 98 Postharvest Diseases of Fruits and Vegetables 0 c LU 6 8 10 0 2 4 Days after harvest Fig. 21. Ethylene evolution from normal Taculta 38' tomato fruit, at its nature-green (A) and mature (B) stages of maturity, following inoculation with Botrytis cinerea (A), or following treatment prior to inoculation (•) as compared to uninfected fruit (•). (Reproduced from Barkai-Golan et al., 1989 with permission of Blackwell Wissenschafts-Verlag GmbH). Ethylene evolution was stimulated, not only in the normal ripening tomato fruit, but also in the non-ripening nor mutant fruit, which did not show any rise in the ethylene level when uninfected (Fig. 22). Thus, fungal infection of the non-ripening mutant tomatoes induced thylene synthesis by tissues which normally lack an active ripening system and do not even respond to exogenic ethylene treatment (Tigchelaar et al., 1978). Earlier and higher ethylene peaks were detected in fruits infected with J5. cinerea than in those infected with G. candidum, corresponding to the faster growth of the former (Barkai-Golan et al., 1989b). http://arab2000.forumpro.fr
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