Resumen

ALVAREZ GIL, Marta A; FITA FERNANDEZ, Ana; RUIZ SANCHEZ, María del C  y  BOLARIN JIMENEZ, María del C. Morphology and biomass variations in root system of young tomato plants (Solanum sp.). cultrop [online]. 2016, vol.37, n.2, pp. 96-101. ISSN 1819-4087.

The scarce exploitation of genotypic variability present in plant roots is an attractive breeding choice with regard to abiotic stresses and supports the objective of this work, which is to identify genotypic variation in root system traits of tomato genotypes (Solanum sp.). Thus, five tomato genotypes were studied: the commercial hybrid cultivar Jaguar (S. lycopersicum), Pera, Volgogradiskij and PE-47 entry (S. pennellii), which were collected in Peru, and the interspecific hybrid PeraxPE-47. Plants were grown in hydroponics for 26 days since germination; their roots were extracted and images were digitalized on scanner to evaluate total length, average diameter, the projected area and root length, following the categories per diameter of the whole root system through software Win Rhizo Pro 2003. The dry mass of roots and aerial parts was also recorded. Results indicated that genotypes differed in morphology, length according to diameter, root system spatial configuration and biomass, mainly with respect to the wild salinity resistant species PE-47. The interspecific hybrid PxPE-47 could be used as a rootstock to increase salt tolerance of susceptible cultivars

Palabras clave : roots; morphology; diversity; rootstock.

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