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Characterization and Functional Implications of the Nonexpressor of Pathogenesis-Related Genes 1 (NPR1) in Saccharum

文献类型： 外文期刊

作者： Zang, Shoujian 1 ; Qin, Liqian 1 ; Zhao, Zhennan 1 ; Zhang, Jing 1 ; Zou, Wenhui 1 ; Wang, Dongjiao 1 ; Feng, Aoyin 1 ; Yang, Shaolin 1 ; Que, Youxiong 1 ; Su, Yachun 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Key Lab Sugarcane Biol & Genet Breeding, Minist Agr & Rural Affairs, Fuzhou 350002, Peoples R China

2.Yunnan Acad Agr Sci, Sugarcane Res Inst, Yunnan Key Lab Sugarcane Genet Improvement, Kaiyuan 661600, Peoples R China

3.Fujian Agr & Forestry Univ, Coll Agr, Key Lab Genet Breeding & Multiple Utilizat Crops, Minist Educ, Fuzhou 350002, Peoples R China

关键词： sugarcane; NPR1-like gene; genome-wide analysis; expression profile; defense response

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

ISSN：

年卷期： 2022 年 23 卷 14 期

页码：

收录情况： SCI

摘要： Sugarcane (Saccharum spp.) is an important sugar and energy crop worldwide. As a core regulator of the salicylic acid (SA) signaling pathway, nonexpressor of pathogenesis-related genes 1 (NPR1) plays a significant role in the response of the plant to biotic and abiotic stresses. However, there is currently no report on the NPR1-like gene family in sugarcane. In this study, a total of 18 NPR1-like genes were identified in Saccharum spontaneum and classified into three clades (clade I, II, and III). The cis-elements predicted in the promotors revealed that the sugarcane NPR1-like genes may be involved in various phytohormones and stress responses. RNA sequencing and quantitative real-time PCR analysis demonstrated that NPR1-like genes were differentially expressed in sugarcane tissues and under Sporisorium scitamineum stress. In addition, a novel ShNPR1 gene from Saccharum spp. hybrid ROC22 was isolated by homologous cloning and validated to be a nuclear-localized clade II member. The ShNPR1 gene was constitutively expressed in all the sugarcane tissues, with the highest expression level in the leaf and the lowest in the bud. The expression level of ShNPR1 was decreased by the plant hormones salicylic acid (SA) and abscisic acid (ABA). Additionally, the transient expression showed that the ShNPR1 gene plays a positive role in Nicotiana benthamiana plants' defense response to Ralstonia solanacearum and Fusarium solani var. coeruleum. This study provided comprehensive information for the NPR1-like family in sugarcane, which should be helpful for functional characterization of sugarcane NPR1-like genes in the future.

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