ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Internal breakdown in mango fruit: symptomology and histology of jelly seed, soft nose and stem-end cavity

Luc Raymond, Bruce Schaffer, Jeffrey K. Brecht and Jonathan H. Crane

Postharvest Biology and Technology Vol: 13 Issue: 1 Pages: 59-70

1998

บทคัดย่อ

Fruit of many mango (Mangifera indica L.) cultivars are susceptible to an internal disorder often referred to as either jelly seed, soft nose, or stem-end cavity (SEC), depending on the symptoms that appear when fruit are cut open. It has not been determined if jelly seed, soft nose, and SEC are different disorders or different symptoms of the same disorder. Sections of fruit mesocarp from the cultivars Irwin, Tommy Atkins, and Van Dyke were examined by light microscopy to characterize the disorder and discern histological differences or similarities among fruit with each of the three types of symptoms. Jelly seed and SEC affected fruit during early fruit ontogeny, whereas soft nose symptoms were detected only in fully developed fruit. No major microscopic differences were detected among fruit with jelly seed, soft nose or SEC. In fruit with each type of symptom, disorganization of the cells and rupture of the cell walls were the first microscopic indicators of the disorder, followed by deterioration or dissolution of vascular connections between the stone and the mesocarp. Stem-end cavity resulted in necrosis of the mesocarp around the cavity. No cavity or tissue necrosis developed around the stone in fruit affected with jelly seed or soft nose. The presence of Ca oxalate crystals was observed only in fruit with SEC. Based on temporal and spatial differences in symptom development within the fruit, it appears that soft nose, jelly seed and SEC may be classified as separate disorders.