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

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dc.contributor.authorLeiva Ampuero, Andres
dc.contributor.authorAgurto, Mario
dc.contributor.authorTomas Matus, Jose
dc.contributor.authorHoppe, Gustavo
dc.contributor.authorHuidobro, Camila
dc.contributor.authorInostroza Blancheteau, Claudio
dc.contributor.authorReyes Diaz, Marjorie
dc.contributor.authorStange, Claudia
dc.contributor.authorCanessa, Paulo
dc.contributor.authorVega, Andrea
dc.date2020
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.citationPEERJ,Vol.8,,2020
dc.identifier.doi10.7717/peerj.9742
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/4035
dc.language.isoen
dc.publisherPEERJ INC
dc.sourcePEERJ
dc.subject.englishAbiotic stress
dc.subject.englishPhotosynthesis
dc.subject.englishSalt stress
dc.subject.englishTomato fruits
dc.subject.englishLycopene
dc.titleSalinity impairs photosynthetic capacity and enhances carotenoid-related gene expression and biosynthesis in tomato (Solanum lycopersicum L. cv. Micro-Tom)
dc.typeArticle
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uct.indizacionSCI
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