Article contents
Influence of within-tree and environmental factors on fruitquality of cactus pear (Opuntia ficus-indica) in Italy
Published online by Cambridge University Press: 16 June 2010
Abstract
Introduction. Opuntia ficus-indica fruit quality wasstudied, in the main sites for cactus pear cultivation in Italy, with the ultimate goal ofunderstanding the main sources of variability and increasing crop value. Materialsand methods. A first study was carried out in 2006 on matureOpuntia ficus-indica trees, cvs. Gialla and Rossa, grown inten commercial orchards located in the main sites for their cultivation in Italy. Treeswere managed to produce an out-of-season crop in October, through the removal of thespring flush at bloom time, during the first week of June. Trees had a similar crop[(52 ± 10) kg of fruits·tree–1], and no more than six fruits were left on eachof the fruiting cladodes. At commercial harvest time, indicated by the peel colourbreakage, 75 fruits in each orchard and 750 fruits for each site were picked, analysed andevaluated by a consumer panel. A second experiment was carried out in 2006 on 8-year-oldO. ficus-indica trees, cv. Gialla, grown in acommercial orchard. Within-tree factors, such as fruit position within the canopy, numberof fruits per tree and per cladode, and cladode dry weight were studied. Results anddiscussion. Fruit weight, shape and total soluble solid content significantlychanged with the environmental conditions, i.e., site and altitude, whileflesh percent, pH and total titratable acidity did not. Cultivars had a significantinfluence only on fruit weight and seed content. Fruit weight changed greatly within thetree, while total soluble solid content and flesh percent variability was much reduced.Fruit weight decreased with fruit number per tree and both fruit weight and total solublesolid content decreased with more than six fruits per cladode. Light interception andcladode dry weight were the main sources of fruit dry weight variability and sugarcontent, while cladode surface area was poorly related to fruit quality. The role ofcultivars in determining fruit quality did not change with site and, moreover, the sensoryanalysis was unable to discriminate for cultivar and environment.
Keywords
- Type
- Original article
- Information
- Copyright
- © 2010 Cirad/EDP Sciences, 2010
References
- 17
- Cited by