Journal
JOURNAL OF INTEGRATIVE PLANT BIOLOGY
Volume 63, Issue 5, Pages 949-960Publisher
WILEY
DOI: 10.1111/jipb.13031
Keywords
ethylene‐ inducing xylanase (EIX); microbe‐ associated molecular pattern (MAMP); Nicotiana benthamiana; PRR; Verticillium dahliae
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Funding
- Fundamental Research Funds for the Central Universities [KYLH201703]
- National Natural Science Foundation of China [31625023]
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The study identified a novel EIX-like protein, VdEIX3, from V. dahliae, which induces immunity in Nicotiana benthamiana. NbEIX2, a leucine-rich repeat receptor-like protein, regulates the perception of VdEIX3 in N. benthamiana. These findings suggest potential applications of NbEIX2 in transgenic breeding for enhancing resistance to Verticillium wilt diseases.
Verticillium wilt diseases caused by the soil-borne fungus Verticillium dahliae result in devastating yield losses in many economically important crops annually. Here, we identified a novel ethylene-inducing xylanase (EIX)-like protein, VdEIX3, from V. dahliae, which exhibits immunity-inducing activity in Nicotiana benthamiana. In vitro-purified VdEIX3 can induce strong oxidative burst, activate the expression of defense-related genes, and increase resistance against oomycete and fungal pathogens in N. benthamiana. VdEIX3 orthologs of other Verticillium pathogens also induce cell death in N. benthamiana, which form a new type of EIX protein family that is distinct from the known EIX proteins. A leucine-rich repeat receptor-like protein, NbEIX2, regulates the perception of VdEIX3 in N. benthamiana. Our results demonstrate that VdEIX3 is a novel EIX-like protein that can be recognized by N. benthamiana NbEIX2, and also suggest that NbEIX2 is a promising receptor-like protein that is potentially applicable to transgenic breeding for improving resistance to Verticillium wilt diseases.
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