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Wang Y, Xu W, Liu Y, Yang J, Guo X, Zhang J, Pu J, Chen N, Zhang W. Identification and Transcriptome Analysis of a Novel Allelic Mutant of NAL1 in Rice. Genes (Basel) 2024; 15:325. [PMID: 38540384 PMCID: PMC10970654 DOI: 10.3390/genes15030325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 02/28/2024] [Accepted: 02/29/2024] [Indexed: 06/14/2024] Open
Abstract
Leaf morphology is a crucial aspect of plant architecture, yet the molecular mechanisms underlying leaf development remain incompletely understood. In this study, a narrow leaf mutant, m625, was identified in rice (Oryza sativa L.), exhibiting pleiotropic developmental defects. Pigment measurement revealed reduced levels of photochromic pigments in m625. Cytological analysis demonstrated that the m625 gene affected vascular patterns and cell division. Specifically, the narrowing of the leaf was attributed to a decrease in small vein number, shorter vein spacing, and an abnormal V-shaped arrangement of bulliform cells, while the thickening was caused by longer leaf veins, thicker mesophyll cells, and an increased number of parenchyma cell layers. The dwarf stature and thickened internode were primarily due to shortened internodes and an increase in cell layers, respectively. Positional cloning and complementation assays indicated that the m625 gene is a novel allele of NAL1. In the m625 mutant, a nucleotide deletion at position 1103 in the coding sequence of NAL1 led to premature termination of protein translation. Further RNA-Seq and qRT-PCR analyses revealed that the m625 gene significantly impacted regulatory pathways related to IAA and ABA signal transduction, photosynthesis, and lignin biosynthesis. Moreover, the m625 mutant displayed thinner sclerenchyma and cell walls in both the leaf and stem, particularly showing reduced lignified cell walls in the midrib of the leaf. In conclusion, our study suggests that NAL1, in addition to its known roles in IAA transport and leaf photosynthesis, may also participate in ABA signal transduction, as well as regulate secondary cell wall formation and sclerenchyma thickness through lignification.
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Affiliation(s)
- Yang Wang
- College of Agricultural Science, Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, Xichang University, Liangshan 615013, China; (W.X.); (Y.L.); (J.Y.); (X.G.); (J.Z.); (J.P.); (W.Z.)
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
| | - Wanxin Xu
- College of Agricultural Science, Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, Xichang University, Liangshan 615013, China; (W.X.); (Y.L.); (J.Y.); (X.G.); (J.Z.); (J.P.); (W.Z.)
| | - Yan Liu
- College of Agricultural Science, Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, Xichang University, Liangshan 615013, China; (W.X.); (Y.L.); (J.Y.); (X.G.); (J.Z.); (J.P.); (W.Z.)
| | - Jie Yang
- College of Agricultural Science, Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, Xichang University, Liangshan 615013, China; (W.X.); (Y.L.); (J.Y.); (X.G.); (J.Z.); (J.P.); (W.Z.)
| | - Xin Guo
- College of Agricultural Science, Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, Xichang University, Liangshan 615013, China; (W.X.); (Y.L.); (J.Y.); (X.G.); (J.Z.); (J.P.); (W.Z.)
| | - Jiaruo Zhang
- College of Agricultural Science, Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, Xichang University, Liangshan 615013, China; (W.X.); (Y.L.); (J.Y.); (X.G.); (J.Z.); (J.P.); (W.Z.)
| | - Jisong Pu
- College of Agricultural Science, Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, Xichang University, Liangshan 615013, China; (W.X.); (Y.L.); (J.Y.); (X.G.); (J.Z.); (J.P.); (W.Z.)
| | - Nenggang Chen
- Institute of Crop Germplasm Resources, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China;
| | - Wenfeng Zhang
- College of Agricultural Science, Panxi Crops Research and Utilization Key Laboratory of Sichuan Province, Xichang University, Liangshan 615013, China; (W.X.); (Y.L.); (J.Y.); (X.G.); (J.Z.); (J.P.); (W.Z.)
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
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Wang H, Zhang Y, Feng X, Hong J, Aamir Manzoor M, Zhou X, Zhou Q, Cai Y. Transcription factor PbMYB80 regulates lignification of stone cells and undergoes RING finger protein PbRHY1-mediated degradation in pear fruit. JOURNAL OF EXPERIMENTAL BOTANY 2024; 75:883-900. [PMID: 37944017 DOI: 10.1093/jxb/erad434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
The Chinese white pear (Pyrus bretschneideri) fruit carries a high proportion of stone cells, adversely affecting fruit quality. Lignin is a main component of stone cells in pear fruit. In this study, we discovered that a pear MYB transcription factor, PbMYB80, binds to the promoters of key lignin biosynthesis genes and inhibits their expression. Stable overexpression of PbMYB80 in Arabidopsis showed that lignin deposition and secondary wall thickening were inhibited, and the expression of the lignin biosynthesis genes in transgenic Arabidopsis was decreased. Transient overexpression of PbMYB80 in pear fruit inhibited lignin metabolism and stone cell development, and the expression of some genes in the lignin metabolism pathway was reduced. In contrast, silencing PbMYB80 with VIGS increased the lignin and stone cell content in pear fruit, and increased expression of genes in the lignin metabolism pathway. By screening a pear fruit cDNA library in yeast, we found that PbMYB80 binds to a RING finger (PbRHY1) protein. We also showed that PbRHY1 exhibits E3 ubiquitin ligase activity and degrades ubiquitinated PbMYB80 in vivo and in vitro. This investigation contributes to a better understanding of the regulation of lignin biosynthesis in pear fruit, and provides a theoretical foundation for increasing pear fruit quality at the molecular level.
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Affiliation(s)
- Han Wang
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Yingjie Zhang
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Xiaofeng Feng
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Jiayi Hong
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Muhammad Aamir Manzoor
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Xinyue Zhou
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Qifang Zhou
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Yongping Cai
- School of Life Sciences, Anhui Agricultural University, Hefei, China
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Wu M, Musazade E, Yang X, Yin L, Zhao Z, Zhang Y, Lu J, Guo L. ATL Protein Family: Novel Regulators in Plant Response to Environmental Stresses. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:20419-20440. [PMID: 38100516 DOI: 10.1021/acs.jafc.3c05603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
Plants actively develop intricate regulatory mechanisms to counteract the harmful effects of environmental stresses. The ubiquitin-proteasome pathway, a crucial mechanism, employs E3 ligases (E3s) to facilitate the conjugation of ubiquitin to specific target substrates, effectively marking them for proteolytic degradation. E3s play critical roles in many biological processes, including phytohormonal signaling and adaptation to environmental stresses. Arabidopsis Toxicosa en Levadura (ATL) proteins, belonging to a subfamily of RING-H2 E3s, actively modulate diverse physiological processes and plant responses to environmental stresses. Despite studies on the functions of certain ATL family members in rice and Arabidopsis, most ATLs still need more comprehensive study. This review presents an overview of the ubiquitin-proteasome system (UPS), specifically focusing on the pivotal role of E3s and associated enzymes in plant development and environmental adaptation. Our study seeks to unveil the active modulation of plant responses to environmental stresses by E3s and ATLs, emphasizing the significance of ATLs within this intricate process. By emphasizing the importance of studying the roles of E3s and ATLs, our review contributes to developing more resilient plant varieties and promoting sustainable agricultural practices while establishing a research roadmap for the future.
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Affiliation(s)
- Ming Wu
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Elshan Musazade
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Xiao Yang
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Le Yin
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Zizhu Zhao
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, P.R. China
| | - Yu Zhang
- Land Requisition Affairs Center of Jilin Province, Changchun 130062, P.R. China
| | - Jingmei Lu
- School of Life Sciences, Northeast Normal University, Changchun 130024, P.R. China
| | - Liquan Guo
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, P.R. China
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