Document Detail


Tomato fruit continues growing while ripening, affecting cuticle properties and cracking.
MedLine Citation:
PMID:  22582930     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Fruit cuticle composition and their mechanical performance have a special role during ripening since internal pressure is no longer sustained by the degraded cell walls of the pericarp but directly transmitted to epidermis and cuticle which could eventually crack. We have studied fruit growth, cuticle modifications and its biomechanics, and fruit cracking in tomato that has been considered a model system for studying fleshy fruit growth and ripening. Tomato fruit cracking is a major disorder that causes severe economic losses and, in cherry tomato, crack appearance is limited to the ripening process. As environmental conditions play a crucial role in fruit growing, ripening and cracking, we grow two cherry tomato cultivars in four conditions of radiation and relative humidity. High relative humidity and low radiation decreased the amount of cuticle and cuticle components accumulated. No effect of relative humidity in cuticle biomechanics was detected. However, cracked fruits had a significantly less deformable (lower maximum strain) cuticle than non-cracked fruits. A significant and continuous fruit growth from mature green to overripe has been detected with special displacement sensors. This growth rate varied among genotypes, with cracking sensitive genotypes showing higher growth rates than cracking resistant ones. Environmental conditions modified this growth rate during ripening, with higher growing rates under high relative humidity and radiation. These conditions corresponded to those that favored fruit cracking. Fruit growth rate during ripening, probably sustained by an internal turgor pressure, is a key parameter in fruit cracking, since fruits that ripened detached from the vine did not crack.
Authors:
Eva Domínguez; María Dolores Fernández; Juan Carlos López Hernández; Jerónimo Pérez Parra; Laura España; Antonio Heredia; Jesús Cuartero
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-14
Journal Detail:
Title:  Physiologia plantarum     Volume:  -     ISSN:  1399-3054     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1256322     Medline TA:  Physiol Plant     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © Physiologia Plantarum 2012.
Affiliation:
IHSM "La Mayora" (CSIC-Universidad de Málaga), Algarrobo-Costa, E-29750 Málaga, Spain Estación Experimental "Las Palmerillas", Fundación Cajamar, E-04080 Almería, Spain.
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