Resumo

RODRIGUEZ, Mariela et al. ANATOMICAL ASPECTS OF DEVELOPMENT OF PINEAPPLE GUAVA FRUIT [ACCA SELLOWIANA (O.BERG) BURRET]. Rev. Fac. Nac. Agron. Medellín [online]. 2010, vol.63, n.1, pp.5267-5273. ISSN 0304-2847.

An anatomical study of feijoa fruits was carried out with the purpose to describe the anatomical changes in the fruit starting from floral bud until the physiological maturity. In order to realize the description, fruit samples of different sizes from clones 41 (Quimba) and 8-4 were taken and histological techniques were applied. The samples were fixed in FAA, after which it was made the inclusion process, it has stages of dehydration, infiltration and inclusion, finally, was made the cut and assembly of the samples with fast- green and safranin. The observations showed that cells of the exocarp and endocarp presented cellular multiplication until advanced stages of development. The mesocarp had an important increment in volume, mainly due to the cellular multiplication at the first and second stages of development and cellular expansion at the last stage of development. One important conclusion was that feijoa fruit is stable anatomically because the tissues observed in the floral bud maintain its identity until when the fruit reaches the physiologic maturity. From the anatomical point of view, the final size of the fruit depends on the continuous cellular multiplications that suffer these tissues and to the cellular expansion in the stage of fruit filling. By microscopic observations it was concluded that the exocarp of the fruit is composed of the outer epidermis and hypodermis, the mesocarp is composed of many layers of parenchyma, the endocarp is formed by the inner epidermis and three or four layers of subepidermal cells in both clones .

Palavras-chave : Physiological maturity; exocarp; mesocarp; endocarp; Myrtaceae.

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