Heinz-resistant tomato cultivars exhibit a lignin-based resistance to field dodder (Cuscuta campestris) parasitism.

Autor:	Jhu MY; Department of Plant Biology, University of California, Davis, CA 95616, USA.; Crop Science Centre, Department of Plant Sciences, University of Cambridge, Cambridge, UK., Farhi M; Department of Plant Biology, University of California, Davis, CA 95616, USA.; The Better Meat Co., 2939 Promenade St. West Sacramento, CA 95691, USA., Wang L; Department of Plant Biology, University of California, Davis, CA 95616, USA.; College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, China., Philbrook RN; Department of Plant Biology, University of California, Davis, CA 95616, USA.; Dark Heart Nursery, 630 Pena Dr, Davis, CA 95616, USA., Belcher MS; Feedstocks Division, Joint BioEnergy Institute, Emeryville, CA 94608, USA.; Department of Plant and Microbial Biology, University of California, Berkeley, CA, USA., Nakayama H; Department of Plant Biology, University of California, Davis, CA 95616, USA.; Graduate School of Science, Department of Biological Sciences, University of Tokyo, Hongo Bunkyo-ku, Tokyo, 113-0033, Japan., Zumstein KS; Department of Plant Biology, University of California, Davis, CA 95616, USA., Rowland SD; Department of Plant Biology, University of California, Davis, CA 95616, USA., Ron M; Department of Plant Biology, University of California, Davis, CA 95616, USA., Shih PM; Department of Plant Biology, University of California, Davis, CA 95616, USA.; Feedstocks Division, Joint BioEnergy Institute, Emeryville, CA 94608, USA.; Genome Center, University of California, Davis, CA 95616, USA.; Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA., Sinha NR; Department of Plant Biology, University of California, Davis, CA 95616, USA.
Jazyk:	angličtina
Zdroj:	Plant physiology [Plant Physiol] 2022 May 03; Vol. 189 (1), pp. 129-151.
DOI:	10.1093/plphys/kiac024
Abstrakt:	Cuscuta species (dodders) are agriculturally destructive, parasitic angiosperms. These parasitic plants use haustoria as physiological bridges to extract nutrients and water from hosts. Cuscuta campestris has a broad host range and wide geographical distribution. While some wild tomato relatives are resistant, cultivated tomatoes are generally susceptible to C. campestris infestations. However, some specific Heinz tomato (Solanum lycopersicum) hybrid cultivars exhibit resistance to dodders in the field, but their defense mechanism was previously unknown. Here, we discovered that the stem cortex in these resistant lines responds with local lignification upon C. campestris attachment, preventing parasite entry into the host. Lignin Induction Factor 1 (LIF1, an AP2-like transcription factor), SlMYB55, and Cuscuta R-gene for Lignin-based Resistance 1, a CC-NBS-LRR (CuRLR1) are identified as factors that confer host resistance by regulating lignification. SlWRKY16 is upregulated upon C. campestris infestation and potentially negatively regulates LIF1 function. Intriguingly, CuRLR1 may play a role in signaling or function as an intracellular receptor for receiving Cuscuta signals or effectors, thereby regulating lignification-based resistance. In summary, these four regulators control the lignin-based resistance response in specific Heinz tomato cultivars, preventing C. campestris from parasitizing resistant tomatoes. This discovery provides a foundation for investigating multilayer resistance against Cuscuta species and has potential for application in other essential crops attacked by parasitic plants. (© The Author(s) 2022. Published by Oxford University Press on behalf of American Society of Plant Biologists.)
Databáze:	MEDLINE
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