Tomato yellow leaf curl virus (TYLCV)-resistant tomatoes share molecular mechanisms sustaining resistance with their wild progenitor Solanum habrochaites but not with TYLCV-susceptible tomatoes.

Autor: Sade D; National Natural History Collections, Edmond J. Safra Campus at Givat Ram, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel; Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 7630003, Israel., Sade N; School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, Israel., Brotman Y; Department of Life Sciences, Ben Gurion University of the Negev, Beersheva, Israel., Czosnek H; Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 7630003, Israel. Electronic address: hanokh.czosnek@mail.huji.ac.il.
Jazyk: angličtina
Zdroj: Plant science : an international journal of experimental plant biology [Plant Sci] 2020 Jun; Vol. 295, pp. 110439. Date of Electronic Publication: 2020 Feb 08.
DOI: 10.1016/j.plantsci.2020.110439
Abstrakt: The wild tomato species Solanum habrochaites (Sh) has been used as a source for tomato yellow leaf curl virus (TYLCV) resistance in a breeding program to generate a TYLCV-resistant tomato line. Susceptible (S) and resistant (R) lines have been developed through this program. We compared the behavior of R, S and Sh tomato plants upon infection to find out whether the resistant phenotype of R plants originated from Sh. Results showed that mechanisms involving sugar-signaling (i.e., LIN6/HT1), water channels (i.e., TIP1;1), hormone homeostasis (i.e., ABA and SA) and urea accumulation were shared by S. habrochaites and R plants, but not by S. habrochaites and S tomatoes. This finding supports the hypothesis that these mechanisms were introgressed in the R genotype from the wild tomato progenitor during breeding for TYLCV resistance. Hence, identification of genes contributing to resistance to biotic stress from wild tomato species and their introgression into domestic plants ensures tomato supply and food security.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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