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Contreras C, Pierantozzi P, Maestri D, Tivani M, Searles P, Brizuela M, Fernández F, Toro A, Puertas C, Trentacoste ER, Kiessling J, Mariotti R, Baldoni L, Mousavi S, Fernandez P, Moschen S, Torres M. How Temperatures May Affect the Synthesis of Fatty Acids during Olive Fruit Ripening: Genes at Work in the Field. PLANTS (BASEL, SWITZERLAND) 2022; 12:54. [PMID: 36616181 PMCID: PMC9824132 DOI: 10.3390/plants12010054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
A major concern for olive cultivation in many extra-Mediterranean regions is the adaptation of recently introduced cultivars to environmental conditions different from those prevailing in the original area, such as the Mediterranean basin. Some of these cultivars can easily adapt their physiological and biochemical parameters in new agro-environments, whereas others show unbalanced values of oleic acid content. The objective of this study was to evaluate the effects of the thermal regime during oil synthesis on the expression of fatty acid desaturase genes and on the unsaturated fatty acid contents at the field level. Two cultivars (Arbequina and Coratina) were included in the analysis over a wide latitudinal gradient in Argentina. The results suggest that the thermal regime exerts a regulatory effect at the transcriptional level on both OeSAD2 and OeFAD2-2 genes and that this regulation is cultivar-dependent. It was also observed that the accumulated thermal time affects gene expression and the contents of oleic and linoleic acids in cv. Arbequina more than in Coratina. The fatty acid composition of cv. Arbequina is more influenced by the temperature regime than Coratina, suggesting its greater plasticity. Overall, findings from this study may drive future strategies for olive spreading towards areas with different or extreme thermal regimes serve as guidance for the evaluation olive varietal patrimony.
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Affiliation(s)
- Cibeles Contreras
- Estación Experimental Agropecuaria San Juan, Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), San Juan 5427, Argentina
| | - Pierluigi Pierantozzi
- Estación Experimental Agropecuaria San Juan, Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), San Juan 5427, Argentina
| | - Damián Maestri
- Instituto Multidisciplinario de Biología Vegetal, X5000 IMBIV—CONICET—Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| | - Martín Tivani
- Estación Experimental Agropecuaria San Juan, Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), San Juan 5427, Argentina
| | - Peter Searles
- Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja, 5301 CRILAR La Rioja—UNLaR-SEGEMAR-UNCa, CONICET, Anillaco 5301, Argentina
| | - Magdalena Brizuela
- Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja, 5301 CRILAR La Rioja—UNLaR-SEGEMAR-UNCa, CONICET, Anillaco 5301, Argentina
| | - Fabricio Fernández
- Estación Experimental Agropecuaria Catamarca, INTA, Sumalao 4705, Argentina
| | - Alejandro Toro
- Estación Experimental Agropecuaria Cerro Azul, INTA, Cerro Azul 3313, Argentina
| | - Carlos Puertas
- Estación Experimental Agropecuaria Junín, INTA, Junín 5573, Argentina
| | | | - Juan Kiessling
- Agencia de Extensión Rural Centenario, INTA, Plottier 8316, Argentina
| | - Roberto Mariotti
- CNR—Institute of Biosciences and Bioresources (IBBR), 06128 Perugia, Italy
| | - Luciana Baldoni
- CNR—Institute of Biosciences and Bioresources (IBBR), 06128 Perugia, Italy
| | - Soraya Mousavi
- CNR—Institute of Biosciences and Bioresources (IBBR), 06128 Perugia, Italy
| | - Paula Fernandez
- Instituto de Agrobiotecnología y Biología Molecular (IABiMo—INTA-CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro de Investigaciones en Ciencias Agronómicas y Veterinarias, INTA, Hurlingham 1686, Argentina
- Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, San Martín 1650, Argentina
- Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C1428EGA Ciudad Autónoma de Buenos Aires, Viamonte 2671, Argentina
| | - Sebastián Moschen
- Estación Experimental Agropecuaria Famaillá, INTA, CONICET, Famaillá 4132, Argentina
| | - Mariela Torres
- Estación Experimental Agropecuaria San Juan, Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), San Juan 5427, Argentina
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Zhang Q, Zhang S, Yu X, Wei X, Huang X, Zhou X. Fine-tuning grain amylose contents by genome editing of Waxy cis-regulatory region in rice. MOLECULAR BREEDING : NEW STRATEGIES IN PLANT IMPROVEMENT 2022; 42:72. [PMID: 37313325 PMCID: PMC10248690 DOI: 10.1007/s11032-022-01342-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 11/12/2022] [Indexed: 06/15/2023]
Abstract
Rice grain amylose contents (ACs) is a key quantitative trait influencing eating and cooking quality. Regulating the expression level of Waxy, a key gene controlling ACs, and in turn fine-tuning the grain ACs, is an ideal approach to improve grain quality of rice varieties. Based on CRISPR/Cas9 genome editing technology, we designed eight targets in the cis-regulatory region of Wxa background, screened phenotypic changes of the transgenic lines and generated eight novel Waxy alleles with altered grain ACs. Among the eight alleles, we found that a 407-bp non-homologous substitution (NHS) in the 5'UTR-intron caused by genome editing regulated Waxy expression and decreased grain ACs by 2.9%. Moreover, embedding the 407-bp NHS into the cis-regulatory region of Wxb allele can also affect gene activity. Our work suggested the effect of 5'UTR-intron on Waxy gene expression regulation, and provided a potentially useful allele in breeding that can finely adjust rice grain ACs.
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Affiliation(s)
- Qi Zhang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234 China
| | - Sinan Zhang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234 China
| | - Xiting Yu
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234 China
| | - Xin Wei
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234 China
| | - Xuehui Huang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234 China
| | - Xiaoyi Zhou
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234 China
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Comparative Analysis and Structural Modeling of Elaeis oleifera FAD2, a Fatty Acid Desaturase Involved in Unsaturated Fatty Acid Composition of American Oil Palm. BIOLOGY 2022; 11:biology11040529. [PMID: 35453727 PMCID: PMC9032008 DOI: 10.3390/biology11040529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 03/13/2022] [Accepted: 03/23/2022] [Indexed: 11/17/2022]
Abstract
Simple Summary Palm oil has become the world’s most important vegetable oil in terms of production quantity, and its overall demand is exponentially growing with the global population. The fatty acid composition and particularly the oleic/linoleic acid ratio are major factors influencing palm oil quality. In this study, we focused on FAD2, a fatty acid desaturase enzyme involved in the desaturation and conversion of oleic acid to linoleic acid in Elaeis oleifera, identified through in silico annotation analysis. Our phylogenetic and comparative studies revealed two SNP markers, SNP278 and SNP851, significantly correlated with the oleic/linoleic acid contents. Our study provides fundamental insights into the mechanism of fatty acids synthesis in oil palm and could support the application of molecular biology techniques to enhance the enzymatic activity and substrate affinity of EoFAD2. Abstract American oil palm (Elaeis oleifera) is an important source of dietary oil that could fulfill the increasing worldwide demand for cooking oil. Therefore, improving its production is crucial and could be realized through breeding and genetic engineering approaches aiming to obtain high-yielding varieties with improved oil content and quality. The fatty acid composition and particularly the oleic/linoleic acid ratio are major factors influencing oil quality. Our work focused on a fatty acid desaturase (FAD) enzyme involved in the desaturation and conversion of oleic acid to linoleic acid. Following the in silico identification and annotation of Elaeis oleifera FAD2, its molecular and structural features characterization was performed to better understand the mechanistic bases of its enzymatic activity. EoFAD2 is 1173 nucleotides long and encodes a protein of 390 amino acids that shares similarities with other FADs. Interestingly, the phylogenetic study showed three distinguished groups where EoFAD2 clustered among monocotyledonous taxa. EoFAD2 is a membrane-bound protein with five transmembrane domains presumably located in the endoplasmic reticulum. The homodimer organization model of EoFAD2 enzyme and substrates and respective substrate-binding residues were predicted and described. Moreover, the comparison between 24 FAD2 sequences from different species generated two interesting single-nucleotide polymorphisms (SNPs) associated with the oleic/linoleic acid contents.
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Guo Y, Zhao X, Li Y, Li Z, Xiao Q, Wang Y, Zhang X, Ni Y. Environment-Driven Adaptations of Leaf Cuticular Waxes Are Inheritable for Medicago ruthenica. FRONTIERS IN PLANT SCIENCE 2021; 12:620245. [PMID: 34079563 PMCID: PMC8165318 DOI: 10.3389/fpls.2021.620245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
Cuticular waxes covering the plant surface play pivotal roles in helping plants adapt to changing environments. However, it is still not clear whether the responses of plant cuticular waxes to their growing environments are inheritable. We collected seeds of Medicago ruthenica (a perennial legume) populations from 30 growing sites in northern China and examined the variations of leaf cuticular waxes in a common garden experiment. Four wax genes, MrFAR3-1, MrFAR3-2, MrCER1, and MrKCS1, involved in biosynthesis of predominant wax classes (primary alcohol and alkane) and wax precursors, were isolated to test the contributions of genetic variations of the coding sequences (CDS) and the promoter sequences and epigenetic modifications. The plasticity responses of the cuticular waxes were further validated by two stress-modeling experiments (drought and enhancing ultraviolet B). Great variations in total wax coverage and abundance of wax classes or wax compounds were observed among M. ruthenica populations in a common garden experiment. Stress-modeling experiments further validated that M. ruthenica would alter leaf wax depositions under changed growing conditions. The transcriptional levels of the wax genes were positively or negatively correlated with amounts of cuticular waxes. However, the analysis of promoter methylation showed that the methylation level of the promoter region was not associated with their expressions. Although both promoter sequences and CDS showed a number of polymorphic sites, the promoters were not naturally selected and insignificant difference could be observed in the numbers and types of acting elements of the four wax genes among populations. In contrast, the CDS of the wax genes were naturally selected, with a number of missense mutations resulting in alterations of the amino acid as well as their isoelectric points and polarities, which could impact on enzyme function/activity. We conclude that long-term adaptation under certain environments would induce genetic mutation of wax biosynthesis genes, resulting in inheritable alterations of cuticular wax depositions.
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Affiliation(s)
- Yanjun Guo
- College of Animal Science and Technology, Southwest University, Chongqing, China
| | - Xiao Zhao
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
| | - Yang Li
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
| | - Zhen Li
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
| | - Qianlin Xiao
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
| | - Yanmei Wang
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
| | - Xuefeng Zhang
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
| | - Yu Ni
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
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Salimonti A, Carbone F, Romano E, Pellegrino M, Benincasa C, Micali S, Tondelli A, Conforti FL, Perri E, Ienco A, Zelasco S. Association Study of the 5'UTR Intron of the FAD2-2 Gene With Oleic and Linoleic Acid Content in Olea europaea L. FRONTIERS IN PLANT SCIENCE 2020; 11:66. [PMID: 32117401 PMCID: PMC7031445 DOI: 10.3389/fpls.2020.00066] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 01/16/2020] [Indexed: 05/21/2023]
Abstract
Cultivated olive (Olea europaea L. subsp. europaea var. europaea) is the most ancient and spread tree crop in the Mediterranean basin. An important quality trait for the extra virgin olive oil is the fatty acid composition. In particular, a high content of oleic acid and low of linoleic, linolenic, and palmitic acid is considered very relevant in the health properties of the olive oil. The oleate desaturase enzyme encoding-gene (FAD2-2) is the main responsible for the linoleic acid content in the olive fruit mesocarp and, therefore, in the olive oil revealing to be the most important candidate gene for the linoleic acid biosynthesis. In this study, an in silico and structural analysis of the 5'UTR intron of the FAD2-2 gene was conducted with the aim to explore the natural sequence variability and its role in the gene expression regulation. In order to identify functional allele variants, the 5'UTR intron was isolated and partially sequenced in 97 olive cultivars. The sequence analysis allowed to find a 117-bp insertion including two long duplications never found before in FAD2-2 genes in olive and the existence of many intron-mediated enhancement (IME) elements. The sequence polymorphism analysis led to detect 39 SNPs. The candidate gene association study conducted for oleic and linoleic acids content revealed seven SNPs and one indel significantly associated able to explain a phenotypic variation ranging from 7% to 16% among the years. Our study highlighted new structural variants within the FAD2-2 gene in olive, putatively involved in the regulation mechanisms of gene expression associated with the variation of the content of oleic and linoleic acid.
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Affiliation(s)
- Amelia Salimonti
- Research Centre for Olive, Citrus and Tree Fruit, CREA, Rende, Italy
| | - Fabrizio Carbone
- Research Centre for Olive, Citrus and Tree Fruit, CREA, Rende, Italy
| | - Elvira Romano
- Research Centre for Olive, Citrus and Tree Fruit, CREA, Rende, Italy
| | | | - Cinzia Benincasa
- Research Centre for Olive, Citrus and Tree Fruit, CREA, Rende, Italy
| | - Sabrina Micali
- Research Centre for Olive, Citrus and Tree Fruit, CREA, Roma, Italy
| | - Alessandro Tondelli
- Research Centre for Genomics and Bioinformatics, CREA, Fiorenzuola D’Arda, Italy
| | - Francesca L. Conforti
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Enzo Perri
- Research Centre for Olive, Citrus and Tree Fruit, CREA, Rende, Italy
| | | | - Samanta Zelasco
- Research Centre for Olive, Citrus and Tree Fruit, CREA, Rende, Italy
- *Correspondence: Samanta Zelasco,
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Abstract
Studying seed oil metabolism. The seeds of higher plants represent valuable factories capable of converting photosynthetically derived sugars into a variety of storage compounds, including oils. Oils are the most energy-dense plant reserves and fatty acids composing these oils represent an excellent nutritional source. They supply humans with much of the calories and essential fatty acids required in their diet. These oils are then increasingly being utilized as renewable alternatives to petroleum for the chemical industry and for biofuels. Plant oils therefore represent a highly valuable agricultural commodity, the demand for which is increasing rapidly. Knowledge regarding seed oil production is extensively exploited in the frame of breeding programs and approaches of metabolic engineering for oilseed crop improvement. Complementary aspects of this research include (1) the study of carbon metabolism responsible for the conversion of photosynthetically derived sugars into precursors for fatty acid biosynthesis, (2) the identification and characterization of the enzymatic actors allowing the production of the wide set of fatty acid structures found in seed oils, and (3) the investigation of the complex biosynthetic pathways leading to the production of storage lipids (waxes, triacylglycerols). In this review, we outline the most recent developments in our understanding of the underlying biochemical and molecular mechanisms of seed oil production, focusing on fatty acids and oils that can have a significant impact on the emerging bioeconomy.
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Affiliation(s)
- Sébastien Baud
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026, Versailles Cedex, France.
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Yin DD, Li SS, Shu QY, Gu ZY, Wu Q, Feng CY, Xu WZ, Wang LS. Identification of microRNAs and long non-coding RNAs involved in fatty acid biosynthesis in tree peony seeds. Gene 2018; 666:72-82. [PMID: 29738839 DOI: 10.1016/j.gene.2018.05.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/20/2018] [Accepted: 05/02/2018] [Indexed: 12/27/2022]
Abstract
MicroRNAs (miRNAs) and long noncoding RNAs (lncRNAs) act as important molecular regulators in a wide range of biological processes during plant development and seed formation, including oil production. Tree peony seeds contain >90% unsaturated fatty acids (UFAs) and high proportions of α-linolenic acid (ALA, > 40%). To dissect the non-coding RNAs (ncRNAs) pathway involved in fatty acids synthesis in tree peony seeds, we construct six small RNA libraries and six transcriptome libraries from developing seeds of two cultivars (J and S) containing different content of fatty acid compositions. After deep sequencing the RNA libraries, the ncRNA expression profiles of tree peony seeds in two cultivars were systematically and comparatively analyzed. A total of 318 known and 153 new miRNAs and 22,430 lncRNAs were identified, among which 106 conserved and 9 novel miRNAs and 2785 lncRNAs were differentially expressed between the two cultivars. In addition, potential target genes of the microRNA and lncRNAs were also predicted and annotated. Among them, 9 miRNAs and 39 lncRNAs were predicted to target lipid related genes. Results showed that all of miR414, miR156b, miR2673b, miR7826, novel-m0027-5p, TR24651|c0_g1, TR24544|c0_g15, and TR27305|c0_g1 were up-regulated and expressed at a higher level in high-ALA cultivar J when compared to low-ALA cultivar S, suggesting that these ncRNAs and target genes are possibly involved in different fatty acid synthesis and lipid metabolism through post-transcriptional regulation. These results provide a better understanding of the roles of ncRNAs during fatty acid biosynthesis and metabolism in tree peony seeds.
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Affiliation(s)
- Dan-Dan Yin
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shan-Shan Li
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Qing-Yan Shu
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Zhao-Yu Gu
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Qian Wu
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Cheng-Yong Feng
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wen-Zhong Xu
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
| | - Liang-Sheng Wang
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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