Abstract
<p><strong>Background. </strong>The NLP-type effectors of <em>Phytophthora capsici</em> are involved in the establishment of the disease and necrosis in solanaceous plants such as <em>Capsicum chinense</em>, a crop that has gained great interest worldwide, and is susceptible to oomycete infection. <strong>Objective.</strong> To evaluate the expression of 18 NLP-type genes during the interaction of <em>Phytophthora capsici</em> against <em>Capsicum chinense</em>, treated with 2-chloroethyl phosphonic acid (ethephon). <strong>Methodology.</strong> Capsicum chinense plants were sprayed with ethephon at 0, 2.5, 5 and 10 mM/ml and inoculated with P. capsici mycelium. Gene expression analyzes by RT-PCR were carried out for NLP-type genes. Results. In plants sprayed with 5 mM/ml ethephon, incised and infected, the necrosis transcripts reported were: Pcnpp ART-1, Pnnp BRT-2, Pcnpp FRT-3, Pcnpp GRT-7, Pcnpp LRT-8. While no transcripts were observed in genes Pcnpp KRT-4, Pcnpp HRT-5, Pcnpp JRT-6, Pcnpp MRT-9, Pcnpp RRT-12, Pcnpp TRT-13, Pcnpp URT-14, Pcnpp XRT-15, Pcnpp YRT -16 and Pcnpp SRT-17. With the plants sprayed with phosphate buffer, without incision, the transcripts reported were: Pcnpp BRT-2, Pcnpp LRT-8. <strong>Implications.</strong> Ethephon induces tolerance to omycete. <strong>Conclusions. </strong>There are differences in gene expression between plants sprayed with ethephon, with incision and infected with <em>P. capsici</em> compared to plants sprayed and without incision. The transcript that was expressed in both groups of plants was BRT-2 and LRT-8, it is concluded that these genes are of greater relevance for a successful infection in this interaction.</p>
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