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

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Postharvest Diseases of Fruits and Vegetables
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Days after inoculation
Fig. 19. Ethylene evolution from green lemon fruit inoculated with postharvest
fungi. (Reproduced from Schiffmann-Nadel, 1974).
and apples infected by Penicillium expansum and species of Alternaria,
Trichothecium, Colletotrichum, Dipiodia and Pestalotia (Schiffmann-Nadel
et al., 1985).
Similarly to non-climacteric fruits, correlations between the rates of
fungal growth on the fruit and the enhancement of physiological processes
was again recorded. Inoculating avocado fruits with Fusarium solani
accelerated fruit respiration and ethylene evolution without enhancing the
peak levels of these two physiological processes (Zauberman and
Schiffmann-Nadel, 1974); i.e., in spite of the acceleration of these
processes, no change in their general patterns had occurred (Figs. 20A,
20B). Inoculating the fruits with other Fusarium spp., characterized by
slow growth rates, only slightly accelerated these two processes.
Inoculating tomato fruits at their pre-cUmacteric stage (mature-green
fruit) with B, cinerea, typically stimulated ethylene evolution, while
inoculations at the post-chmacteric stage (mature fruit) elicited new
ethylene peaks (Barkai-Golan et al., 1989b) (Fig. 21).
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