期刊
PLANT CELL AND ENVIRONMENT
卷 44, 期 1, 页码 290-303出版社
WILEY
DOI: 10.1111/pce.13921
关键词
Botrytis cinerea (Grey mould); callose; chitosan; defence priming; induced resistance; Solanaceae; Solanum lycopersicum (tomato); transcriptomics
资金
- AHDB (HDC) [CP105]
- Biotechnology and Biological Sciences Research Council [BB/P00556X/1, BB/P00556X/2]
- BBSRC [BB/P00556X/1, BB/P00556X/2] Funding Source: UKRI
Current crop protection strategies against Botrytis cinerea rely on conventional fungicides and host genetic resistance, but these strategies are not sufficient due to pathogen evolution and fungicide regulations. Defence elicitors like chitosan can prime plant defense mechanisms for faster and stronger resistance expression upon pathogen recognition. This study identified novel tomato genes, ACRE75 and ACRE180, which act as positive regulators of plant resistance against B. cinerea, providing valuable information for protecting Solanaceae plants.
Current crop protection strategies against the fungal pathogen Botrytis cinerea rely on a combination of conventional fungicides and host genetic resistance. However, due to pathogen evolution and legislation in the use of fungicides, these strategies are not sufficient to protect plants against this pathogen. Defence elicitors can stimulate plant defence mechanisms through a phenomenon known as defence priming. Priming results in a faster and/or stronger expression of resistance upon pathogen recognition by the host. This work aims to study defence priming by a commercial formulation of the elicitor chitosan. Treatments with chitosan result in induced resistance (IR) in solanaceous and brassicaceous plants. In tomato plants, enhanced resistance has been linked with priming of callose deposition and accumulation of the plant hormone jasmonic acid (JA). Large-scale transcriptomic analysis revealed that chitosan primes gene expression at early time-points after infection. In addition, two novel tomato genes with a characteristic priming profile were identified, Avr9/Cf-9 rapidly elicited protein 75 (ACRE75) and 180 (ACRE180). Transient and stable over-expression of ACRE75, ACRE180 and their Nicotiana benthamiana homologs, revealed that they are positive regulators of plant resistance against B. cinerea. This provides valuable information in the search for strategies to protect Solanaceae plants against B. cinerea.
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