Salinity impairs photosynthetic capacity and enhances carotenoid-related gene expression and biosynthesis in tomato (Solanum lycopersicum L. cv. Micro-Tom)

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datacite.alternateIdentifier.citationPEERJ,Vol.8,,2020
datacite.alternateIdentifier.doi10.7717/peerj.9742
datacite.creatorLeiva Ampuero, Andres
datacite.creatorAgurto, Mario
datacite.creatorTomas Matus, Jose
datacite.creatorHoppe, Gustavo
datacite.creatorHuidobro, Camila
datacite.creatorInostroza Blancheteau, Claudio
datacite.creatorReyes Diaz, Marjorie
datacite.creatorStange, Claudia
datacite.creatorCanessa, Paulo
datacite.creatorVega, Andrea
datacite.date2020
datacite.subject.englishAbiotic stress
datacite.subject.englishPhotosynthesis
datacite.subject.englishSalt stress
datacite.subject.englishTomato fruits
datacite.subject.englishLycopene
datacite.titleSalinity impairs photosynthetic capacity and enhances carotenoid-related gene expression and biosynthesis in tomato (Solanum lycopersicum L. cv. Micro-Tom)
dc.date.accessioned2021-04-30T17:06:07Z
dc.date.available2021-04-30T17:06:07Z
dc.description.abstractCarotenoids are essential components of the photosynthetic antenna and reaction center complexes, being also responsible for antioxidant defense, coloration, and many other functions in multiple plant tissues. In tomato, salinity negatively affects the development of vegetative organs and productivity, but according to previous studies it might also increase fruit color and taste, improving its quality, which is a current agricultural challenge. The fruit quality parameters that are increased by salinity are cultivar-specific and include carotenoid, sugar, and organic acid contents. However, the relationship between vegetative and reproductive organs and response to salinity is still poorly understood. Considering this, Solanum lycopersicum cv. Micro-Tom plants were grown in the absence of salt supplementation as well as with increasing concentrations of NaCl for 14 weeks, evaluating plant performance from vegetative to reproductive stages. In response to salinity, plants showed a significant reduction in net photosynthesis, stomatal conductance, PSII quantum yield, and electron transport rate, in addition to an increase in non-photochemical quenching. In line with these responses the number of tomato clusters decreased, and smaller fruits with higher soluble solids content were obtained. Mature-green fruits also displayed a salt-dependent higher induction in the expression of PSY1, PDS, ZDS, and LYCB, key genes of the carotenoid biosynthesis pathway, in correlation with increased lycopene, lutein, ficarotene, and violaxanthin levels. These results suggest a key relationship between photosynthetic plant response and yield, involving impaired photosynthetic capacity, increased carotenoid-related gene expression, and carotenoid biosynthesis.
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/4035
dc.language.isoen
dc.publisherPEERJ INC
dc.sourcePEERJ
oaire.resourceTypeArticle
uct.catalogadorWOS
uct.indizacionSCI
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