Mechanism of Bruise Resistance in Pepino (Solanum muricatum) Fruit

Freshly harvested fruit of two cultivars and 16 selections of the pepino (Solanum muricatum Ait.) were given a compressive loading. Bruise indices, calculated as the product of the resultant bruise length and width, varied significantly among clones. The cultivar ‘Suma’ was most susceptible to bruis...

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Bibliographic Details
Published in:Annals of botany 1990-08, Vol.66 (2), p.155-161
Main Authors: GOULD, K. S., HAMMETT, K. R. W., STEINHAGEN, SIGRUN
Format: Article
Language:English
Subjects:
Adaptation to environment and cultivation conditions
Agriculture
Agronomy. Soil science and plant productions
American culture
anatomy
Biological and medical sciences
Body tissues
Bruises
bruising
Cell walls
Exocarp
fruit
Fruits
Fundamental and applied biological sciences. Psychology
Genetics and breeding of economic plants
Horticulture
mechanical stress
Mesocarp
Pepino
plant breeding
Plants
Solanum muricatum Ait
Varietal selection. Specialized plant breeding, plant breeding aims
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Summary:Freshly harvested fruit of two cultivars and 16 selections of the pepino (Solanum muricatum Ait.) were given a compressive loading. Bruise indices, calculated as the product of the resultant bruise length and width, varied significantly among clones. The cultivar ‘Suma’ was most susceptible to bruise injury, while selection S15/14 was most resistant. Exocarp cells and interstitial air-spaces were larger in ‘Suma’ than in S15/14. Exocarp cells were compressed, but did not rupture under the loading. Mesocarp cells separated from one another, ruptured and collapsed in compressed ‘Suma’ fruit. Mesocarp cells of S15/14 were unaffected by the treatment. The role of the exocarp in the distribution of mechanical stress is discussed.
ISSN:0305-7364
1095-8290
DOI:10.1093/oxfordjournals.aob.a088010