Modern tomato (Solanum lycopersicum L.) breeding has mainly focused on increasing productivity under unlimited watering. In contrast, some Mediterranean accessions have been traditionally cultivated under water shortage and selected on the basis of their water-use efficiency (WUE). Ramellet and Penjar landraces were planted with other traditional, old and modern inbreeds, under full irrigation. In order to found differences between the tomato accessions, gas-exchange and leaf morphology measurements were performed. Despite high variability, Ramellet and Penjar presented clear differences compared to modern cultivars, mostly related to leaf morphology and photosynthetic traits, while no differences were found in WUE. Results highlighted that better leaf CO2 conductance might be a main factor determining the improvement of net CO2 assimilation and WUE.
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Balearic Islands Ramellet accessions
- C a :
CO2 ambient concentration
- C c :
chloroplastic CO2 concentration
- C i :
substomatal CO2 concentration
modern inbreeds accessions
old varieties accessions
traditional non-long shelf-life fruit genotype accessions
Catalonian Penjar accessions
electron transport rate
- g m :
- g s :
stomatal conductance to H2O
- gtotal :
the total conductance
leaf isotope composition
leaf mass area
long shelf-life fruit phenotype
principal components analyses
- P N :
net photosynthetic rate
- R D :
rate of mitochondrial respiration at darkness
- R L :
rate of mitochondrial respiration in light
- Vcmax :
maximum velocity of Rubisco carboxylation
Valencian Country Penjar accessions
Western Mediterranean accessions
- WUEi :
intrinsic water-use efficiency
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We thank Dr. Ángeles Calatayud (IVIA) and Dr Sergio González Nebauer (UPV) for lending us their Li-Cor 6400, and Dr. Cyril Douthe for help in intendance. We are also grateful to Mr. Maurici Calduch for crop care and management. Also, we would like to thank Dr. Biel Martorell for his technical help on the IRMS and all the staff at the Serveis Cientifico-Tecnics of the Universitat de les Illes Balears for their help while running these experiments. This work was funded by the projects TOMDRO (AGL2013) to Dr. Galmés, TRADITOM (EC H2020 topic SFS-7a-2014 Contract 634561) to A. Granell, and AAEE/56/2015 from the Government of the Balearic Islands. We also thank to two anonymous reviewers for their helpful comments to improve the manuscript.
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Fullana-Pericàs, M., Conesa, M.À., Soler, S. et al. Variations of leaf morphology, photosynthetic traits and water-use efficiency in Western-Mediterranean tomato landraces. Photosynthetica 55, 121–133 (2017). https://doi.org/10.1007/s11099-016-0653-4
Additional key words
- carbon assimilation
- carbon isotope composition
- diffusive limitations
- mesophyll conductance