Fine structurar chanses o."o.rrrtufJLl"l."".n"matous outer pericarp of romaro fruit (a repreientative higli-nroisture, edible plrnt tissue) were followcd throughout the fruit's normal gro:wth cycle on thc plant. Illustrated in electron micrographs, these changes involve the structura-l components-.ot the protooiasnr]both membranousind non-membranous. Normal intercellular space eni"rn"-"r.t and cell wall separadon are also shorvn. The observations are discuised in relation ro some of the biochemical and physiological changes knor'vn ro occur in the devcloping fruir. The results indicate thi porential value of electron microscopy in'ext-ending presenr knowledge of cerrain. problem areas in fruit and vegetible research, s'oih "t the process=es involved in the onset of senescence, the* mechanism of' physiologicai disorders, and the fundamental nature of quality changes affecting the tissue's edible propcrties.
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