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    Diverse traits contribute to salinity tolerance of wild tomato seedlings from the Galapagos Islands.

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    Type
    Article
    Authors
    Pailles, Yveline
    Awlia, Mariam Sahal Abdulaziz
    Julkowska, Magdalena
    Passone, Luca cc
    Zemmouri, Khadijah
    Negrão, Sónia
    Schmöckel, Sandra M
    Tester, Mark A. cc
    KAUST Department
    King Abdullah University of Science and Technology (KAUST) CITY: Thuwal STATE: Mekkah Saudi Arabia [SA].
    Plant Science
    Water Desalination and Reuse Research Center (WDRC)
    Earth Science and Engineering Program
    Desert Agriculture Initiative
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2019-10-25
    Online Publication Date
    2019-10-25
    Print Publication Date
    2020-01
    Permanent link to this record
    http://hdl.handle.net/10754/660088
    
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    Abstract
    Traits of modern crops have been heavily selected in agriculture, leaving commercial lines often more susceptible to harsh conditions compared with their wild relatives. Understanding the mechanisms of stress tolerance in wild relatives can enhance crop performance under stress conditions such as high salinity. In this study, we investigated salinity tolerance of two species of wild tomato endemic to the Galapagos Islands, Solanum cheesmaniae and Solanum galapagense. Since these tomatoes grow well despite being constantly splashed with seawater, they represent a valuable genetic resource for improving salinity tolerance in commercial tomatoes. To explore their potential, we recorded over 20 traits reflecting plant growth, physiology, and ion content in 67 accessions and two commercial tomato lines of Solanum lycopersicum. Salt treatments were applied for ten days using supported hydroponics. The Galapagos tomatoes displayed greater tolerance to salt stress than the commercial lines and showed substantial natural variation in their responses. The accessions LA0317, LA1449, and LA1403 showed particularly high salinity tolerance based on growth under salinity stress. Therefore, Galapagos tomatoes should be further explored to identify the genes underlying their high tolerance and be used as a resource for increasing the salinity tolerance of commercial tomatoes. The generated data, along with useful analysis tools, have been packaged and made publicly available via an interactive online application (https://github.com/mmjulkowska/La_isla_de_tomato) to facilitate trait selection and the use of Galapagos tomatoes for the development of salt-tolerant commercial tomatoes.
    Citation
    Pailles, Y., Awlia, M., Julkowska, M. M., Passone, L., Zemmouri, K., Negrão, S., … Tester, M. (2019). Diverse traits contribute to salinity tolerance of wild tomato seedlings from the Galapagos Islands. Plant Physiology, pp.00700.2019. doi:10.1104/pp.19.00700
    Sponsors
    We thank Igor Silva and Derek Burgess for assisting with logistics throughout the project and Shireen Hammoud for assisting with sample collection and processing. We are also grateful to Muppala Reddy, Marina Khashat, and Gomerito Sagun (KAUST greenhouse) for providing the experimental facilities and technical support. Substantial text and content editing input from Neelima Sinha (UC Davis) is also gratefully acknowledged. The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). The authors have no conflicts of interest to declare.
    Publisher
    American Society of Plant Biologists (ASPB)
    Journal
    Plant physiology
    DOI
    10.1104/pp.19.00700
    Additional Links
    http://www.plantphysiol.org/lookup/doi/10.1104/pp.19.00700
    http://www.plantphysiol.org/content/plantphysiol/early/2019/10/25/pp.19.00700.full.pdf
    ae974a485f413a2113503eed53cd6c53
    10.1104/pp.19.00700
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Earth Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC); Desert Agriculture Initiative

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