SciELO - Scientific Electronic Library Online

 
vol.49 issue1Pérdidas de nitrógeno por volatilización y eficiencia de uso en maíz desde urea aplicada en diferentes momentosAvances sobre el manejo de arvenses en la huerta agroecológica author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

  • Have no cited articlesCited by SciELO

Related links

  • Have no similar articlesSimilars in SciELO

Share


RIA. Revista de investigaciones agropecuarias

On-line version ISSN 1669-2314

Abstract

AVILA, C. et al. Efecto del estrés salino en el régimen hídrico, concentración de compuestos osmóticamente activos y pigmentos fotosintéticos en cultivares de tomate. RIA. Rev. investig. agropecu. [online]. 2023, vol.49, n.1, pp.32-40. ISSN 1669-2314.

This work aimed to identify ecophysiological and biochemical indicators to characterize tomato genotypes tolerant to salt stress. Four varieties (Amalia, Vyta, Campbell-28 and Claudia) were studied under semi-controlled conditions, a salinized medium based on NaCl at electrical conductivity (EC) of 6 dS m-1 with their respective control at EC=0.36 dS m-1. Proline content, glycine betaine, total soluble proteins, chlorophyll and carotenoids, water potential in leaves and roots, leaf osmotic potential and osmotic adjustment (AO) were the evaluated variables. A principal component analysis (PCA) was carried out to determine the indicators that most contribute to salinity tolerance variability. There was a significant variability response in the evaluated indicators between the saline medium and the control medium. Proline increased between 3 and 9 mg g-1 mf in roots and between 8 and 23 mg g-1 mf in leaves, demonstrating the ability to osmoregulation in function of organic solutes. The Amalia and Vyta varieties presented the highest increases in glycine betaine (18 mg g-1 ms). All the varieties reduced their water potential under salinity conditions to values lower than -0.9 MPa, consequently there was a significant OA among the varieties, with Vita and Amalia being the ones with the highest OA. Starting from the PCA analysis, it was found that the variables root and leaf water potential, osmotic potential, osmotic adjustment and proline content were the ones with the greatest contribution to the total variability found among varieties. Vyta and Amalia were tolerant varieties while Claudia and Campbell-28 classified as susceptible.

Keywords : salinity; ecophysiology; biochemical; tomato; tolerance; Vyta.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )