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Showing 1 results for Pattern-Triggered Immunity

Fatemeh Hatami, Farhad Nazarian-Firouzabadi, Seyed Sajad Sohrabi, Mitra Khademi,
Volume 11, Issue 1 (9-2024)
Abstract

Saffron (Crocus sativus L.) is not only one of the most expensive food products in Iran and the world but also holds a special place among Iran's export and industrial products. Since saffron is propagated only through corms, preventing the contamination of corms as “seed” with devastating pathogens is crucial to maintaining the quality and yield of the saffron. Hence, investigating the genetic mechanisms associated with the response of the saffron plant to fungal pathogens such as fusarium wilt rot (Fusarium oxysporum) is of great importance. Given that plants express a wide range of resistance genes to defend themselves, the role of genes related to the PTI (Pattern-Triggered Immunity) pathway, such as those in the LysM-RLK family, is crucial in pathogen resistance. Therefore, studying the transcriptome of saffron corms infected with the pathogen Fusarium oxysporum is important for identifying and investigating the genes belonging to the RLP and RLK gene families. Plants express a wide range of resistance genes to respond to pathogens attacks. Among different gene families associated with PTI pathway, the LysM-RLK family plays an important role in resistance to pathogens. Therefore, in this study, the transcriptome of saffron corms infected with the Fusarium oxysporum was studied to identify and investigate the genes belonging to the RLP and RLK gene families. According to the results of this study, a total of 45 genes encoding PTI pathway receptors were identified in the saffron transcriptome, with 40 sequences belonging to the RLP (Receptor-like proteins) family and 5 sequences to the RLK (Receptor-like kinases) family. The expression analysis of some main RLP and RLK family members showed that the highest expression was related to the sequences of Contig 41583 (RLP) and Contig 61879 (RLK) in the saffron stigma and corms, respectively. Furthermore, the expression of the selected genes in the infected corms significantly increased compared to the control healthy corm. Additionally, the expression levels of the target genes (Contig 41583 and Contig 61879) assessed using qRT-PCR indicated higher expression in corms 72 hours post-infection compared to 48 hours post-inoculation. These results suggest that RLK proteins play a crucial role in the interaction between saffron and the pathogen, particularly due to the presence of the LysM motif. Since LysM motif binds to chitin oligomers of fungal cell walls of certain fungi and oomycetes, it triggers plant immune responses. Overall, the findings of this study are significant for understanding the specific nature of the plant-pathogen relationship and can contribute to insights into the PTI immune pathway.


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پژوهش های ژنتیک گیاهی Plant Genetic Researches
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