文献类型： 外文期刊

作者： Rizwan, Hafiz Muhammad ¹ ; Fang Shaozhong ² ; Li, Xiaoting ¹ ; Arshad, Muhammad Bilal ³ ; Yousef, Ahmed Fathy ¹ ; Yang Chenglong ² ; Shi, Meng ¹ ; Jaber, Mohammed Y. M. ⁵ ; Anwar, Muhammad ⁶ ; Hu, Shuai-Ya ⁷ ; Yang, Qiang ¹ ; Sun, Kaiwei ¹ ; Ahmed, Mohamed A. A. ⁸ ; Min, Zheng ⁹ ; Oelmueller, Ralf ¹ ; Lin Zhimin ² ; Chen, Faxing ¹ ;

作者机构： 1.Fujian Agr & Forestry Univ, Coll Hort, Fuzhou, Peoples R China

2.Fujian Acad Agr Sci, Inst Biotechnol, Fuzhou, Peoples R China

3.Univ Sargodha, Dept Plant Breeding & Genet, Coll Agr, Sargodha, Pakistan

4.Univ Al Azhar, Dept Hort, Coll Agr, Assiut, Egypt

5.An Najah Natl Univ, Fac Agr & Vet Med, Dept Plant Prod & Protect, Nablus, Palestine

6.Shenzhen Univ, Coll Life Sci & Oceanog, Guangdong Technol Res Ctr Marine Algal Bioengn, Guangdong Key Lab Plant Epigenet, Shenzhen, Peoples R China

7.Nanjing Agr Univ, Acad Adv Interdisciplinary Studies, Coll Hort, Nanjing, Peoples R China

8.Alexandria Univ, Fac Agr Saba Basha, Plant Prod Dept Hort Med & Aromat Plants, Alexandria, Egypt

9.Fujian Agr Vocat Coll, Dept Hort, Fuzhou, Peoples R China

10.Friedrich Schiller Univ Jena, Matthias Schleiden Inst, Plant Physiol, Jena, Germany

关键词： very long chain fatty acids; wax biosynthesis; synteny; transcription factor; micro-RNA; gene anthology; stress conditions

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）

ISSN： 1664-462X

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Plant and fruit surfaces are covered with cuticle wax and provide a protective barrier against biotic and abiotic stresses. Cuticle wax consists of very-long-chain fatty acids (VLCFAs) and their derivatives. beta-Ketoacyl-CoA synthase (KCS) is a key enzyme in the synthesis of VLCFAs and provides a precursor for the synthesis of cuticle wax, but the KCS gene family was yet to be reported in the passion fruit (Passiflora edulis). In this study, thirty-two KCS genes were identified in the passion fruit genome and phylogenetically grouped as KCS1-like, FAE1-like, FDH-like, and CER6-like. Furthermore, thirty-one PeKCS genes were positioned on seven chromosomes, while one PeKCS was localized to the unassembled genomic scaffold. The cis-element analysis provides insight into the possible role of PeKCS genes in phytohormones and stress responses. Syntenic analysis revealed that gene duplication played a crucial role in the expansion of the PeKCS gene family and underwent a strong purifying selection. All PeKCS proteins shared similar 3D structures, and a protein-protein interaction network was predicted with known Arabidopsis proteins. There were twenty putative ped-miRNAs which were also predicted that belong to nine families targeting thirteen PeKCS genes. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) annotation results were highly associated with fatty acid synthase and elongase activity, lipid metabolism, stress responses, and plant-pathogen interaction. The highly enriched transcription factors (TFs) including ERF, MYB, Dof, C2H2, TCP, LBD, NAC, and bHLH were predicted in PeKCS genes. qRT-PCR expression analysis revealed that most PeKCS genes were highly upregulated in leaves including PeKCS2, PeKCS4, PeKCS8, PeKCS13, and PeKCS9 but not in stem and roots tissues under drought stress conditions compared with controls. Notably, most PeKCS genes were upregulated at 9th dpi under Fusarium kyushuense biotic stress condition compared to controls. This study provides a basis for further understanding the functions of KCS genes, improving wax and VLCFA biosynthesis, and improvement of passion fruit resistance.