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Gene editing for allergen amelioration in plants – A review 改善植物过敏原的基因编辑 - 综述
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-11-12 DOI: 10.1016/j.plgene.2024.100476
Anindita Chakraborty , Stephen J. Wylie
The aim of this review is to summarize current advancements in the application of CRISPR to ameliorate allergenicity in plant-based foods. The literature on food allergens highlights the negative impacts on quality of life for many sufferers. Efforts to select low-allergenicity crop varieties through conventional means have had limited success. Here we review the literature describing gene editing to eliminate allergenicity genes and measure subsequent allergen expression. Gene editing is a means of inserting or deleting nucleotides at precise locations/genes in the genome, and the most widely used technology is CRISPR (clustered regularly interspaced short palindromic repeats) along with an endonuclease such as Cas9 (CRISPR/Cas9). An example are the α-amylase/trypsin inhibitors (ATIs) in wheat that are responsible for bakers' asthma. CRISPR was utilized to simultaneously knock down two ATI subunits, resulting in reduced expression of both subunits. Between 1.4 % and 4.5 % of children suffer from peanut allergy. Progress toward knock down of expression of genes encoding known allergens in peanuts is reviewed. Other allergenic plant species of interest in this review are soy and mustard. Gene editing has the potential to manipulate expression of allergen genes to reduce allergenicity, but as some allergens play important roles in physiological processes such as biotic and abiotic stress amelioration, simply targeting their genes with CRISPR to abolish expression is not always feasible.
本综述旨在总结目前在应用 CRISPR 改善植物性食品过敏性方面取得的进展。有关食物过敏原的文献强调了过敏原对许多患者生活质量的负面影响。通过传统方法选择低过敏性作物品种的努力成效有限。在此,我们回顾了有关基因编辑的文献,以消除致敏基因并测量随后的过敏原表达。基因编辑是在基因组的精确位置/基因上插入或删除核苷酸的一种手段,最广泛使用的技术是 CRISPR(聚类有规则间隔短回文重复序列)和 Cas9(CRISPR/Cas9)等内切酶。例如,小麦中的α-淀粉酶/胰蛋白酶抑制剂(ATIs)是面包师哮喘的罪魁祸首。利用 CRISPR 同时敲除两个 ATI 亚基,导致两个亚基的表达量减少。1.4%到4.5%的儿童患有花生过敏症。本文综述了敲除花生中已知过敏原编码基因表达的进展。本综述关注的其他致敏植物物种是大豆和芥菜。基因编辑有可能操纵过敏原基因的表达以降低过敏性,但由于一些过敏原在生物和非生物应激改善等生理过程中发挥重要作用,因此简单地用 CRISPR 针对其基因来取消表达并不总是可行的。
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引用次数: 0
Alternative oxidase of plants mitochondria is related with increased resistance of tomato mtDNA to the difenoconazole exposure 植物线粒体的替代氧化酶与番茄mtDNA对苯醚甲环唑暴露的抗性增强有关
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-11-02 DOI: 10.1016/j.plgene.2024.100475
Alina A. Alimova , Maria V. Gureeva , Mariya I. Gladkikh , Ekaterina Yu Nesterova , Mikhail Yu Syromyatnikov , Artem P. Gureev
It is known that plant mitochondria and mitochondrial DNA (mtDNA) are more resistant to damage than animal mitochondria. We hypothesized that this phenomenon may be related to alternative respiratory pathways in plants mitochondria, in particular alternative oxidase (AOX). The results of a pot experiment demonstrated that the application of the fungicide difenoconazole at concentrations that were 3-, 5-, and 10-times higher than the recommended dosage resulted in a 106 %, 76 %, and 90 % increase in mitochondrial DNA damage in tomato shoots, respectively, in comparison to the shoots treated with difenoconazole at the dosage recommended by the manufacturer. Inhibition of shoot growth was observed in response to treatment with difenoconazole at a dose 10times higher than recommended. It is noteworthy that when tomatoes were treated with difenoconazole at this concentration, there was a tendency for the expression of inducible aox1a. In a field experiment, difenoconazole at a concentration of 5 times higher than recommended resulted in a 10 % increase in mtDNA damage in the fruits compared to the control. Similar results were obtained in an in vitro experiment. The addition of low doses of difenoconazole to intact tomato mitochondria did not cause mtDNA damage. The observed damages occured only when 200 μM difenoconazole was added. In contrast, incubation of 20 μM difenoconazole with SHAM, which inhibits AOX, resulted in a 115 % increase in mtDNA damage compared to the use of the same concentration without difenoconazole. This finding is consistent with the damaging effect induced by 200 μM difenoconazole. The increase in difenoconazole toxicity induced by SHAM and the elevation in aox1a gene expression resulting from the treatment with a 10 times higher than the recommended dose of difenoconazole may signify a pivotal function of AOX in the increased resistance of plant mtDNA to the pesticide exposure.
众所周知,植物线粒体和线粒体 DNA(mtDNA)比动物线粒体更能抵抗损伤。我们假设这一现象可能与植物线粒体中的替代呼吸途径有关,特别是替代氧化酶(AOX)。盆栽实验结果表明,施用浓度比推荐剂量高 3 倍、5 倍和 10 倍的杀菌剂苯醚甲环唑,与按生产商推荐剂量施用苯醚甲环唑处理的番茄嫩芽相比,线粒体 DNA 损伤分别增加了 106%、76% 和 90%。在使用比建议剂量高 10 倍的苯醚甲环唑处理番茄时,发现番茄嫩芽的生长受到抑制。值得注意的是,用这一浓度的苯醚甲环唑处理西红柿时,诱导性 aox1a 有表达的趋势。在一项田间试验中,浓度比推荐值高 5 倍的苯醚甲环唑导致果实中的 mtDNA 损伤比对照组增加了 10%。体外实验也得出了类似的结果。在完整的番茄线粒体中添加低剂量的苯醚甲环唑不会造成 mtDNA 损伤。只有加入 200 μM 的苯醚甲环唑时,才会出现观察到的损伤。相反,将 20 μM 的苯醚甲环唑与抑制 AOX 的 SHAM 一起孵育时,与使用相同浓度的苯醚甲环唑时相比,mtDNA 损伤增加了 115%。这一发现与 200 μM 苯醚甲环唑诱导的破坏作用一致。SHAM 诱导的苯醚甲环唑毒性的增加,以及高于推荐剂量 10 倍的苯醚甲环唑处理导致的 aox1a 基因表达的增加,可能表明 AOX 在提高植物 mtDNA 对农药暴露的抗性方面起着关键作用。
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引用次数: 0
Genome-wide identification and characterization of FORMIN genes in cotton: Implications for abiotic stress tolerance 棉花中 FORMIN 基因的全基因组鉴定和特征描述:对非生物胁迫耐受性的影响
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-10-28 DOI: 10.1016/j.plgene.2024.100474
Rasmieh Hamid , Feba Jacob , Zahra Ghorbanzadeh , Mohsen Mardi , Shohreh Ariaeenejad , Mehrshad Zeinalabedini , Mohammad Reza Ghaffari

Background

Formins are highly conserved proteins with multiple domains that play an important role in the interaction with microfilaments and microtubules and thus regulate actin organisation and cytoskeletal dynamics. Despite their importance in plant development and response to stress, the study of FORMIN (FH) genes in cotton, an important fibre crop, remains limited. The genetic diversity of these genes is critical for improving the adaptability of cotton to environmental stress, which is a major challenge for cotton breeding programmes aimed at improving abiotic stress tolerance.

Results

Through comprehensive bioinformatics approaches, we identified 46, 50 and 27 putative FH genes in Gossypium hirsutum, G. barbadense and their diploid ancestors G. arboreum and G. raimondii, respectively. A phylogenetic analysis classified these genes into five subfamilies and revealed evolutionary relationships to Arabidopsis thaliana. Syntenic and collinear analyses showed that genomic duplications in cotton have driven the expansion of the FH gene family. Structural analysis showed significant variations in sequence length and conserved motifs. Promoter analysis revealed several cis-acting elements associated with growth, stress response and hormonal signalling. Protein-protein interaction predictions suggest involvement in hormone signalling, cytoskeletal regulation and cell wall dynamics. Differential expression of G. hirsutum FH (GhFH) genes in different cotton tissues under drought and osmotic stress was confirmed by qRT-PCR.

Conclusion

This study provides new insights into the functional diversity and evolutionary dynamics of FH genes in cotton and emphasises their potential role in improving abiotic stress tolerance. By identifying key regulatory genes involved in stress adaptation, this research contributes to the development of more resilient cotton varieties through targeted breeding strategies. The results underline the importance of genetic diversity in enabling cotton breeding programmes to overcome the challenges posed by abiotic stress.
背景Formins是具有多个结构域的高度保守蛋白,在与微丝和微管的相互作用中发挥重要作用,从而调节肌动蛋白的组织和细胞骨架的动态。尽管FORMIN(FH)基因在植物发育和应激反应中具有重要作用,但对棉花这种重要纤维作物中FORMIN(FH)基因的研究仍然有限。结果通过综合生物信息学方法,我们在 Gossypium hirsutum、G. barbadense 及其二倍体祖先 G. arboreum 和 G. raimondii 中分别鉴定出 46、50 和 27 个推测的 FH 基因。系统进化分析将这些基因分为五个亚家族,并揭示了它们与拟南芥的进化关系。同源分析和共线分析表明,棉花基因组的重复推动了 FH 基因家族的扩展。结构分析表明,序列长度和保守基序存在显著差异。启动子分析揭示了几个与生长、应激反应和激素信号有关的顺式作用元件。蛋白质-蛋白质相互作用预测表明,该基因参与激素信号、细胞骨架调节和细胞壁动力学。通过 qRT-PCR 验证了在干旱和渗透胁迫下不同棉花组织中 G. hirsutum FH(GhFH)基因的差异表达。通过确定参与胁迫适应的关键调控基因,这项研究有助于通过有针对性的育种策略培育更具抗逆性的棉花品种。研究结果强调了遗传多样性对于棉花育种计划克服非生物胁迫挑战的重要性。
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引用次数: 0
Analysis of marker gene transfer from chloroplasts to mitochondria in heat-shocked and selection-pressured tobacco 热冲击和选择压力烟草叶绿体到线粒体的标记基因转移分析
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-10-28 DOI: 10.1016/j.plgene.2024.100473
Masaki Odahara , Maai Mori , Keiji Numata
Angiosperm mitochondrial genomes have highly complex and diverse structures that are partly due to frequent insertions of nuclear and chloroplast DNA (cpDNA) into mitochondrial DNA (mtDNA). This suggests the existence of mechanisms for gene transfer from chloroplasts to mitochondria, but these have yet to be discovered. In this study, we aimed to capture chloroplast-to-mitochondrion gene transfer by analyzing the translocation of a marker gene, sul, encoding a bacterial dihydropteroate synthase that confers sulfonamide resistance in tobacco (Nicotiana tabacum), to mtDNA. First, we created tobacco chloroplast transformants in which sul, surrounded on both sides by ∼1 kb of mitochondrial homologous sequences that enable targeted integration into mtDNA, was introduced into the chloroplast genome. Heat shock enhanced sul expression in the transformants, suggesting that chloroplast degradation can stimulate gene transfer from chloroplasts to mitochondria. Shoot regeneration using the heat-shocked chloroplast transformants under sulfadiazine selection resulted in several transformants with moderate resistance to sulfadiazine. Deep sequencing analysis of the target mitochondrial locus detected sul in the sulfadiazine-resistant (SR) plants, but an integration efficiency was 0.0011–0.0051 %. We validated the results by ruling out sul integration into nuclear mitochondrial DNA (NuMT). From these results, we propose the established system is capable of capturing gene transfer from chloroplasts to mitochondria in tobacco, but the transfer efficiency is substantially lower than those from organelles to nucleus.
被子植物线粒体基因组的结构非常复杂多样,部分原因是核DNA和叶绿体DNA(cpDNA)频繁插入线粒体DNA(mtDNA)。这表明存在基因从叶绿体转移到线粒体的机制,但这些机制尚未被发现。在本研究中,我们旨在通过分析编码细菌二氢蝶酸合成酶的标记基因 sul 向 mtDNA 的转移,捕捉叶绿体向线粒体的基因转移。首先,我们创建了烟草叶绿体转化体,将两侧被线粒体同源序列(可定向整合到 mtDNA 中)包围的 sul 导入叶绿体基因组。热休克增强了转化体中 sul 的表达,表明叶绿体降解可刺激基因从叶绿体转移到线粒体。在磺胺嘧啶选择条件下,使用热休克叶绿体转化体进行嫩枝再生,产生了几种对磺胺嘧啶具有中等抗性的转化体。对目标线粒体基因座的深度测序分析在抗磺胺嘧啶(SR)植株中检测到了 sul,但整合效率为 0.0011-0.0051%。我们排除了 sul 与核线粒体 DNA(NuMT)整合的可能性,从而验证了这一结果。根据这些结果,我们认为已建立的系统能够捕获烟草中从叶绿体到线粒体的基因转移,但转移效率大大低于从细胞器到细胞核的转移效率。
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引用次数: 0
Transgressive segregation and generation mean analysis reveal the gene action underlying the inheritance of drought tolerance in rice 转基因分离和世代平均数分析揭示了水稻耐旱性遗传的基因作用机制
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-10-22 DOI: 10.1016/j.plgene.2024.100472
Kossi Lorimpo Adjah , Maxwell Darko Asante , Aboubacar Toure , Mawuli Aziadekey , Shailesh Yadav , Felix Frimpong , Francis Osei Amoako-Andoh , Daniel Dzorkpe Gamenyah
Climate change, an effective driver of unprecedented seasonal droughts, is greatly affecting rice production in Africa by threatening food security and safety. Rice, one of the major staple crops on the continent, can save the situation through the development of drought-tolerant cultivars, presenting a major challenge for future rice improvement programs as drought is regarded as a critical limitation in rain-fed ecosystems. This study sought to understand the genetic basis and inheritance behind the expression of tolerance of rice breeding lines to drought-stress through generation mean analysis. To achieve these objectives, two drought-sensitive genotypes (Jasmine 85 and CRI-Agrarice) were crossed with a drought-tolerant genotype (APO) to develop six populations (F1, F2, BC1, BC2, P1 and P2) under screenhouse drought-stress and non-stress evaluation. Data were collected on grain yield and yield-related traits among which the generation mean analysis was conducted. At least one transgressive phenotype was produced in the F2 population for each trait whether there is a significant difference or not among the parental lines under drought-stress. Under non-stress conditions, there was a significance for all six types of gene action for days to flowering in both crosses. Among both crosses and water-regimes, additive x additive gene interaction was significant for most of the traits even though the scaling tests were not significant indicating the effectiveness of selection in early generations. Therefore, either forward breeding or backcross breeding can be adopted as breeding strategies for rapid improvement for these lines to drought tolerance.
气候变化是前所未有的季节性干旱的有效驱动因素,对非洲的水稻生产造成极大影响,威胁着粮食安全和保障。水稻是非洲大陆的主要主粮作物之一,可以通过培育耐旱栽培品种来挽救这一局面,但由于干旱被认为是雨水灌溉生态系统中的一个关键限制因素,这对未来的水稻改良计划提出了重大挑战。本研究试图通过世代平均数分析,了解水稻育种品系对干旱胁迫耐受性表达背后的遗传基础和遗传方式。为了实现这些目标,研究人员将两个对干旱敏感的基因型(Jasmine 85 和 CRI-Agrarice)与一个耐旱基因型(APO)杂交,在筛选室干旱胁迫和非胁迫评估条件下培育出六个群体(F1、F2、BC1、BC2、P1 和 P2)。收集了谷物产量和产量相关性状的数据,并对其中的世代平均数进行了分析。在干旱胁迫条件下,无论亲本品系之间是否存在显著差异,F2 群体中每个性状都至少产生一个转基因表型。在非胁迫条件下,两个杂交种的所有六种基因对开花天数的作用都具有显著性。在两个杂交种和水源条件下,尽管缩放检验不显著,但加性基因与加性基因的相互作用对大多数性状都有显著影响,这表明早期世代的选择是有效的。因此,可以采用正交育种或回交育种作为育种策略,以快速改良这些品系的抗旱性。
{"title":"Transgressive segregation and generation mean analysis reveal the gene action underlying the inheritance of drought tolerance in rice","authors":"Kossi Lorimpo Adjah ,&nbsp;Maxwell Darko Asante ,&nbsp;Aboubacar Toure ,&nbsp;Mawuli Aziadekey ,&nbsp;Shailesh Yadav ,&nbsp;Felix Frimpong ,&nbsp;Francis Osei Amoako-Andoh ,&nbsp;Daniel Dzorkpe Gamenyah","doi":"10.1016/j.plgene.2024.100472","DOIUrl":"10.1016/j.plgene.2024.100472","url":null,"abstract":"<div><div>Climate change, an effective driver of unprecedented seasonal droughts, is greatly affecting rice production in Africa by threatening food security and safety. Rice, one of the major staple crops on the continent, can save the situation through the development of drought-tolerant cultivars, presenting a major challenge for future rice improvement programs as drought is regarded as a critical limitation in rain-fed ecosystems. This study sought to understand the genetic basis and inheritance behind the expression of tolerance of rice breeding lines to drought-stress through generation mean analysis. To achieve these objectives, two drought-sensitive genotypes (Jasmine 85 and CRI-Agrarice) were crossed with a drought-tolerant genotype (APO) to develop six populations (F<sub>1</sub>, F<sub>2</sub>, BC<sub>1</sub>, BC<sub>2</sub>, P<sub>1</sub> and P<sub>2</sub>) under screenhouse drought-stress and non-stress evaluation. Data were collected on grain yield and yield-related traits among which the generation mean analysis was conducted. At least one transgressive phenotype was produced in the F<sub>2</sub> population for each trait whether there is a significant difference or not among the parental lines under drought-stress. Under non-stress conditions, there was a significance for all six types of gene action for days to flowering in both crosses. Among both crosses and water-regimes, additive x additive gene interaction was significant for most of the traits even though the scaling tests were not significant indicating the effectiveness of selection in early generations. Therefore, either forward breeding or backcross breeding can be adopted as breeding strategies for rapid improvement for these lines to drought tolerance.</div></div>","PeriodicalId":38041,"journal":{"name":"Plant Gene","volume":"40 ","pages":"Article 100472"},"PeriodicalIF":2.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Targeted editing of susceptibility genes for plant disease resistance: Current state and future hopes 植物抗病易感基因的定向编辑:现状与未来希望
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-10-19 DOI: 10.1016/j.plgene.2024.100471
Lingareddy Usha Rani , Manisha Shelke , Maddi Sandhya , Govindasamy Senthilraja
Plants are constantly exposed to a plethora of pathogens including bacteria, fungi, and viruses posing significant challenges to global food security. The susceptibility of plants to these pathogens is often determined by specific genes within their genome. Understanding the role of susceptibility genes in plant-pathogen interactions is crucial for devising effective strategies to combat crop diseases. This review elucidates the importance of susceptibility genes in plants concerning their interactions with fungal, bacterial and viral pathogens. Susceptibility genes often encode proteins involved in crucial cellular processes such as signal transduction, defense response and pathogen recognition. Pathogens exploit vulnerabilities in these genes to establish infection and multiply within the host plant. In addition, advances in genome editing technologies offer promising avenues to enhance plant resistance against pathogens by targeting susceptibility genes. Techniques such as genome editing tools and epigenomic modification allow precise changes to be made in plant genomes, including the elimination or modification of susceptibility genes to confer resistance. However, ethical considerations and regulatory frameworks need to be addressed to ensure the potential use of gene editing in agriculture.
植物经常受到细菌、真菌和病毒等大量病原体的侵袭,这给全球粮食安全带来了重大挑战。植物对这些病原体的易感性通常由其基因组中的特定基因决定。了解易感基因在植物与病原体相互作用中的作用对于制定有效的作物病害防治策略至关重要。本综述阐明了植物易感基因在植物与真菌、细菌和病毒病原体相互作用中的重要性。易感基因通常编码参与信号转导、防御反应和病原体识别等关键细胞过程的蛋白质。病原体利用这些基因中的漏洞在寄主植物体内建立感染和繁殖。此外,基因组编辑技术的进步为通过靶向易感基因来增强植物对病原体的抵抗力提供了广阔的前景。基因组编辑工具和表观基因组修饰等技术可以精确改变植物基因组,包括消除或改变易感基因,从而赋予植物抗性。然而,要确保基因编辑在农业中的潜在应用,还需要解决伦理方面的考虑和监管框架问题。
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引用次数: 0
Genome-wide identification and expression analysis of genes encoding late embryogenesis proteins in Cicer arietinum 对 Cicer arietinum 中编码胚胎后期发生蛋白的基因进行全基因组鉴定和表达分析
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-09-28 DOI: 10.1016/j.plgene.2024.100469
Reetu Singh , Varnika Rana , Sudesh Kumar Yadav , Vinay Kumar
Late embryogenesis abundant (LEA) proteins play defensive roles during seed maturation and seed germination processes. However, there is no such investigation was carried out in chickpea. In present study, genome wide identification and characterization of LEA encoding genes has been investigated, and identified 65 and 74 LEA encoding genes in desi and kabuli cultivar of chickpea, respectively. All these genes have been classified into eight subfamilies on the bases of their phylogenetic analysis and conserved domain. Maximum members of LEA encoding genes were found to be a part of the LEA_2 gene family. The analysis of physicochemical properties of LEAs was also conducted. LEA encoding genes have been found to be located in all chromosomes (8 chr) of chickpea and identified as involved in response to stimulus, biological processes, molecular functions and cellular components based upon gene ontology analysis. Gene expression analysis of randomly selected 8 LEA encoding genes has been carried out during different seed developmental stages which revealed the higher expression of LEA encoding genes during later stage of seed development in chickpea and proved their potential role in desiccation process during seed maturation. During seed germination, expression analysis of LEA encoding genes was found to be higher during the initial stages of seed germination. In conclusion, this work highlights the genome wide identification and characterization of LEA encoding genes in chickpea and proposed potential roles during seed developmental processes. This information could also be useful as a reference investigation for molecular breeding of chickpea for recalcitrant behaviour of seed.
胚胎发生后期丰富蛋白(LEA)在种子成熟和种子萌发过程中发挥着防御作用。然而,在鹰嘴豆中还没有开展过此类调查。本研究对 LEA 编码基因进行了全基因组鉴定和表征,在 desi 和 kabuli 栽培品种鹰嘴豆中分别鉴定出 65 和 74 个 LEA 编码基因。根据其系统发育分析和保守结构域,所有这些基因被分为八个亚家族。研究发现,LEA 编码基因中最大的成员属于 LEA_2 基因家族。此外,还对 LEA 的理化性质进行了分析。发现 LEA 编码基因位于鹰嘴豆的所有染色体(8 chr)上,并根据基因本体分析确定其参与刺激响应、生物过程、分子功能和细胞成分。随机选取的 8 个 LEA 编码基因在不同的种子发育阶段进行了基因表达分析,结果表明 LEA 编码基因在鹰嘴豆种子发育后期的表达量较高,并证明了它们在种子成熟过程中干燥过程中的潜在作用。在种子萌发过程中,对 LEA 编码基因的表达分析发现其在种子萌发初期的表达量较高。总之,这项工作强调了鹰嘴豆中 LEA 编码基因的全基因组鉴定和特征描述,并提出了它们在种子发育过程中的潜在作用。这些信息也可作为鹰嘴豆分子育种的参考调查,以了解种子的抗逆性。
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引用次数: 0
Genome-wide identification of clock-associated genes and circadian rhythms in Fragaria × ananassa seedlings Fragaria × ananassa幼苗中时钟相关基因和昼夜节律的全基因组鉴定
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-09-25 DOI: 10.1016/j.plgene.2024.100470
Misaki Ishibashi , Norihito Nakamichi , Yuki Hayashida , Haruka Kazumori , Shungo Otagaki , Shogo Matsumoto , Akira Oikawa , Katsuhiro Shiratake
Flowering time in plants is regulated by a photoperiod-responsive mechanism. Some plant species use a circadian clock-based control mechanism to adapt to variable environments. Strawberry is a horticultural crop that responds to certain photoperiods and temperatures to induce flowering. However, clock-associated genes in octoploid cultivated strawberry (Fragaria × ananassa) have not been defined, and their regulatory mechanism for responding to photoperiods is unclear. We herein targeted 12 clock-associated genes reported in other plant species and performed a genome-wide analysis and expression comparison in F. × ananassa seedlings. Seventy-eight sequences were selected from the F. × ananassa genome. The major domains and cis-acting elements were conserved in each sequence. Transcripts were clearly expressed under continuous light conditions in F. × ananassa seedlings (‘Yotsuboshi’) acclimated to long days. Among them, 9 genes maintained their unique autonomous circadian rhythms and may function as clock genes. LHY (LATE ELONGATED HYPOCOTYL) had the Myb domain and LHY expression peaked in the dawn. PRR (PSEUDO-RESPONSE REGULATOR) family members (PRR9, PRR7, PRR5, and TOC1 (TIMING OF CAB EXPRESSION 1)) had a pseudo-receiver domain and CCT domain, and peak expression times began sequentially from the afternoon for PRR9 to the evening for TOC1. LUX (LUXARRHYTHMO) had a Myb domain, and LUX expression peaked in evening with ELF3 (EARLY FLOWERING 3). FKF1 (FLAVIN-BINDING KELCH REPEAT F BOX 1) had PAS and F-box domains, and FKF1 expression peaked in the afternoon. GI (GIGANTEA) expression also peaked in the afternoon. F. × ananassa (‘Yotsuboshi’) appears to have multiple feedback loops comprising clock-associated genes. Although the rhythmic expression of CHE (CCA1 HIKING EXPEDITION) and ZTL (ZEITLUPE) was not observed, they had conserved domains, CHE with the TCP domain and ZTL with the PAS and F-box domains. The present results provide basic information on the circadian clock for the control of F. × ananassa flowering.
植物的开花时间由光周期响应机制调节。一些植物物种利用基于昼夜节律钟的控制机制来适应多变的环境。草莓是一种园艺作物,它能对特定的光周期和温度做出反应,从而诱导开花。然而,八倍体栽培草莓(Fragaria × ananassa)中的时钟相关基因尚未确定,它们对光周期响应的调控机制也不清楚。在此,我们以其他植物物种中报道的 12 个时钟相关基因为目标,对 F. × ananassa 幼苗进行了全基因组分析和表达比较。从 F. × ananassa 基因组中筛选出 78 个序列。每个序列的主要结构域和顺式作用元件都是保守的。在适应长日照的 F. × ananassa幼苗('Yotsuboshi')中,转录本在连续光照条件下明显表达。其中,9 个基因保持了独特的自主昼夜节律,可能具有时钟基因的功能。LHY(LATE ELONGATED HYPOCOTYL)具有Myb结构域,LHY的表达在黎明达到峰值。PRR(PSEUDO-RESPONSE REGULATOR)家族成员(PRR9、PRR7、PRR5 和 TOC1(TIMING OF CAB EXPRESSION 1))具有伪接收结构域和 CCT 结构域,其表达峰值从 PRR9 的下午到 TOC1 的傍晚依次出现。LUX(LUXARRHYTHMO)有一个 Myb 结构域,LUX 的表达峰值与 ELF3(EARLY FLOWERING 3)一起出现在傍晚。FKF1(FLAVIN-BINDING KELCH REPEAT F BOX 1)具有 PAS 和 F-box 结构域,FKF1 的表达在下午达到峰值。GI(GIGANTEA)的表达也在下午达到峰值。F. × ananassa('Yotsuboshi')似乎有多个由时钟相关基因组成的反馈回路。虽然没有观察到 CHE(CCA1 HIKING EXPEDITION)和 ZTL(ZEITLUPE)的节律性表达,但它们具有保守的结构域,CHE 具有 TCP 结构域,ZTL 具有 PAS 和 F-box 结构域。本研究结果为控制 F. × ananassa 开花的昼夜节律时钟提供了基本信息。
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引用次数: 0
Transcriptome analysis of inflorescence embryogenesis in Festuca Glauca Festuca Glauca 花序胚胎发生的转录组分析
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-09-19 DOI: 10.1016/j.plgene.2024.100468
Hongjuan Xu , Baohui Zhang , Lan Yang , Yuxuan Jin , Weize Wang , Ning Ao , Panpan Yang , Zhilin Chen
In this study, RNA-seq was employed for transcriptome sequencing at four developmental stages of normal (L) and embryogenic (X) Festuca glauca ‘Elijah Blue’ inflorescences to analyze and identify the metabolic pathways and regulatory genes associated with inflorescence embryogenesis, thereby facilitating the understanding of the molecular mechanisms of inflorescence embryogenesis in Festuca glauca. The results revealed a total of 50,733 differentially expressed genes (DEGs) between the control (L) and embryogenic (X) samples at different developmental stages. Among them, 19,640 (38.71 %) were upregulated and 31,093 (61.29 %) were downregulated. A total of 2585 DEGs were expressed in both stage 1 (L1-vs-X1) and stage 4 (L4-vs-X4). Gene Ontology (GO) analysis revealed that the DEGs in these stages were mainly enriched in processes related to photosynthetic membranes, chloroplasts, activity of DNA-binding transcription factors, components of ribosomal structure, reactions involving oxidized compounds, and photosynthesis; while Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis revealed that the DEGs in these stages were mainly enriched in pathways such as plant-pathogen interactions, plant hormone signal transduction, phenylpropanoid biosynthesis, ribosomes, and galactose metabolism. The top families containing differentially expressed transcription factors (DETFs) in these stages included ERF, bHLH, MYB-related, NAC, and WRKY. A total of 39 and 29 DETFs associated with embryogenesis were identified in the L1-vs-X1 and L4-vs-X4 stages, respectively. Additionally, 79 and 110 embryogenesis-related genes were identified in the plant hormone signal transduction metabolic pathway in the L1-vs-X1 and L4-vs-X4 stages, respectively.
本研究采用RNA-seq技术对正常(L)和胚胎发生(X)的Festuca glauca 'Elijah Blue'花序的四个发育阶段进行转录组测序,分析和鉴定与花序胚胎发生相关的代谢途径和调控基因,从而促进对Festuca glauca花序胚胎发生分子机制的理解。研究结果显示,对照样本(L)和胚胎发生样本(X)在不同发育阶段共有 50,733 个差异表达基因(DEGs)。其中,上调基因 19,640 个(38.71%),下调基因 31,093 个(61.29%)。共有 2585 个 DEGs 在第 1 阶段(L1-vs-X1)和第 4 阶段(L4-vs-X4)均有表达。基因本体(GO)分析表明,这些阶段的 DEGs 主要富集在与光合膜、叶绿体、DNA 结合转录因子的活性、核糖体结构成分、涉及氧化化合物的反应和光合作用有关的过程中;京都基因和基因组百科全书》(KEGG)分析表明,这些阶段的 DEGs 主要富集在植物与病原体相互作用、植物激素信号转导、苯丙类生物合成、核糖体和半乳糖代谢等途径中。在这些阶段,含有差异表达转录因子(DETFs)的最高家族包括 ERF、bHLH、MYB 相关、NAC 和 WRKY。在 L1-vs-X1 和 L4-vs-X4 阶段,分别发现了 39 和 29 个与胚胎发生相关的 DETFs。此外,在 L1-vs-X1 和 L4-vs-X4 阶段的植物激素信号转导代谢途径中分别发现了 79 和 110 个与胚胎发生相关的基因。
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引用次数: 0
Advances in genome editing and future prospects for Sorghum improvement: A review 基因组编辑的进展和高粱改良的未来前景:综述
IF 2.2 Q3 GENETICS & HEREDITY Pub Date : 2024-07-16 DOI: 10.1016/j.plgene.2024.100464
Micheale Yifter Weldemichael , Hailay Mehari Gebremedhn , Teklehaimanot Hailesslasie Teklu

Recent developments in targeted genome editing accelerated genetic research and opened new potentials to improve crops for better yields and quality. Given the significance of cereal crops as a primary source of food for the global population, the utilization of contemporary genome editing techniques like CRISPR/Cas9 is timely and crucial. CRISPR/Cas technology has enabled targeted genomic modifications, revolutionizing genetic research and exploration. Application of gene editing through CRISPR/Cas9 in enhancing sorghum is particularly vital given the current ecological, environmental, and agricultural challenges exacerbated by climate change. As sorghum is one of the main staple foods of our region and known to be a resilient crop with high potential to overcome the above challenges, application of genome editing technology will enhance investigation of gene functionality. CRISPR/Cas9 enables the improvement of desirable sorghum traits, including nutritional value, yield, resistance to pests and diseases, and tolerance to various abiotic stresses. Furthermore, CRISPR/Cas9 has the potential to perform intricate editing and reshape the existing elite sorghum varieties, and introduce new genetic variations. However, current research primarily focuses on improving the efficacy of CRISPR/Cas9 system in successfully editing endogenous sorghum genes, making it a feasible and successful undertaking in sorghum improvement. Recent advancements and developments in CRISPR/Cas9 techniques have further empowered researchers to modify additional genes in sorghum with greater efficiency. Successful application and advancement of CRISPR techniques in sorghum will not only aid in gene discovery, the creation of novel traits that regulate gene expression, and functional genomics, but also in facilitating site-specific integration events. The purpose of this review is, therefore, to elucidate the current advances in sorghum genome editing and highlight its potential in addressing food security issues. It also assesses the efficiency of CRISPR-mediated improvement and its long-term effects on crop improvement and host resistance against parasites, including tissue-specific activity and the ability to induce resistance. This review ends by emphasizing the challenges and opportunities of CRISPR technology in combating parasitic plants, and proposing directions for future research to safeguard global agricultural productivity.

定向基因组编辑技术的最新发展加速了遗传研究,为提高作物产量和质量开辟了新的潜力。鉴于谷类作物作为全球人口主要食物来源的重要性,利用 CRISPR/Cas9 等当代基因组编辑技术非常及时和重要。CRISPR/Cas 技术实现了有针对性的基因组修改,为基因研究和探索带来了革命性的变化。鉴于气候变化加剧了当前的生态、环境和农业挑战,通过 CRISPR/Cas9 技术应用基因编辑技术改良高粱尤为重要。众所周知,高粱是本地区的主要主粮之一,也是一种生命力顽强的作物,具有克服上述挑战的巨大潜力,因此基因组编辑技术的应用将加强对基因功能的研究。CRISPR/Cas9 能够改良高粱的理想性状,包括营养价值、产量、对病虫害的抗性以及对各种非生物胁迫的耐受性。此外,CRISPR/Cas9 还有可能对现有的高粱优良品种进行复杂的编辑和重塑,并引入新的基因变异。然而,目前的研究主要集中在提高 CRISPR/Cas9 系统成功编辑高粱内源基因的效率,使其成为改良高粱的一项可行且成功的工作。CRISPR/Cas9 技术的最新进展和发展进一步增强了研究人员的能力,使他们能够以更高的效率修改高粱中的其他基因。CRISPR 技术在高粱中的成功应用和发展不仅有助于基因发现、创造调控基因表达的新性状和功能基因组学,还有助于促进特定位点整合事件的发生。因此,本综述旨在阐明当前高粱基因组编辑的进展,并强调其在解决粮食安全问题方面的潜力。本综述还评估了 CRISPR 介导的改良效率及其对作物改良和宿主抗寄生虫能力的长期影响,包括组织特异性活性和诱导抗性的能力。本综述最后强调了 CRISPR 技术在防治寄生植物方面的挑战和机遇,并提出了未来研究的方向,以保障全球农业生产力。
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引用次数: 0
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Plant Gene
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