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Morphological and Anatomical Aspects of Oedema in Eggplants (Solanum melongena L.)1


Oedema in eggplant occurred in 2 of 6 cultivars grown in warm, humid air-supported plastic greenhouses located in Puerto Peñasco, Mexico. Oedema was observed when plants reached the fruiting stage and its occurrence was limited to the upper side of young and old leaves, including the petioles. Anatomically, hypertrophy of the palisade cells, followed by rupturing in the upper epidermis, was characteristic of oedemata. Hypertrophied cells apparently contained fewer chloroplasts than normal cells, although chlorophyll determination for susceptible and resistant cultivars did not suggest a correlation with this oedema. Differences in chlorophyll, fruit number, and yield were characteristic of the different cultivars.