Arianna Frittelli , Samuela Palombieri , Giulia Quagliata , Silvia Celletti , Stefania Astolfi , Ermelinda Botticella , Stefania Masci , Pasquale De Vita , Mirko Volpato , Francesco Sestili
{"title":"The silencing of TdIPK1 genes enhances micronutrient concentration in durum wheat grain","authors":"Arianna Frittelli , Samuela Palombieri , Giulia Quagliata , Silvia Celletti , Stefania Astolfi , Ermelinda Botticella , Stefania Masci , Pasquale De Vita , Mirko Volpato , Francesco Sestili","doi":"10.1016/j.cpb.2023.100309","DOIUrl":null,"url":null,"abstract":"<div><p>Phytic acid (PA) is the main storage form of phosphorus in kernel and is considered an anti-nutritional compound because of its ability to bind to essential minerals such as iron (Fe), zinc (Zn), potassium (K), calcium (Ca) and magnesium (Mg), thus limiting their availability, especially for populations whose diet is largely based on staple crops.</p><p>This study reports a promising nutrient biofortification approach of durum wheat. The approach was based on the silencing of the gene encoding the <em>inositol pentakisphosphate 2- kinase 1</em> (<em>IPK1</em>), involved in the last step of the PA biosynthetic pathway, through a Targeting Induced Local Lesions IN Genomes (TILLING) approach. Single knockout mutants for the <em>IPK1</em> homeoalleles were identified and crossed to pyramid the two mutations. Although an elevated number of plants (F<sub>2</sub> and F<sub>3</sub> progenies) were analysed, no genotypes lacking both the homeoalleles were recovered, suggesting that the expression of <em>IPK1</em> is crucial for seed formation in the spike and/or for plant germination and development.</p><p>The characterization of the single null genotypes highlighted that the partial TdIPK1-B1<sup>-</sup> mutants showed a lower accumulation of PA in the kernel along with a higher content of essential microelements (Fe, Mn, Zn) compared to the control wild-type. The pattern of mineral accumulation was different for the TdIPK1-A1<sup>-</sup> mutants which only presented a greater accumulation of K.</p></div>","PeriodicalId":38090,"journal":{"name":"Current Plant Biology","volume":null,"pages":null},"PeriodicalIF":5.4000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214662823000385/pdfft?md5=e68149342ec56c38ffbeba826468f67d&pid=1-s2.0-S2214662823000385-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Current Plant Biology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214662823000385","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Phytic acid (PA) is the main storage form of phosphorus in kernel and is considered an anti-nutritional compound because of its ability to bind to essential minerals such as iron (Fe), zinc (Zn), potassium (K), calcium (Ca) and magnesium (Mg), thus limiting their availability, especially for populations whose diet is largely based on staple crops.
This study reports a promising nutrient biofortification approach of durum wheat. The approach was based on the silencing of the gene encoding the inositol pentakisphosphate 2- kinase 1 (IPK1), involved in the last step of the PA biosynthetic pathway, through a Targeting Induced Local Lesions IN Genomes (TILLING) approach. Single knockout mutants for the IPK1 homeoalleles were identified and crossed to pyramid the two mutations. Although an elevated number of plants (F2 and F3 progenies) were analysed, no genotypes lacking both the homeoalleles were recovered, suggesting that the expression of IPK1 is crucial for seed formation in the spike and/or for plant germination and development.
The characterization of the single null genotypes highlighted that the partial TdIPK1-B1- mutants showed a lower accumulation of PA in the kernel along with a higher content of essential microelements (Fe, Mn, Zn) compared to the control wild-type. The pattern of mineral accumulation was different for the TdIPK1-A1- mutants which only presented a greater accumulation of K.
期刊介绍:
Current Plant Biology aims to acknowledge and encourage interdisciplinary research in fundamental plant sciences with scope to address crop improvement, biodiversity, nutrition and human health. It publishes review articles, original research papers, method papers and short articles in plant research fields, such as systems biology, cell biology, genetics, epigenetics, mathematical modeling, signal transduction, plant-microbe interactions, synthetic biology, developmental biology, biochemistry, molecular biology, physiology, biotechnologies, bioinformatics and plant genomic resources.