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Liver biopsy revealing anti-neutrophil cytoplasmic antibody-associated vasculitis: a tale for a challenging diagnosis. 肝活检发现抗中性粒细胞胞浆抗体相关性血管炎:一个具有挑战性诊断的故事。
IF 2.4 Q3 MEDICINE, RESEARCH & EXPERIMENTAL Pub Date : 2024-12-31 Epub Date: 2024-08-07 DOI: 10.2144/fsoa-2023-0222
Bahaeddine Lahbacha, Abir Chaabane, Wafa Garbouj, Roua Mankai, Amina Bani, Amal Khsiba, Raja Amri, Salwa Nechi, Emna Chelbi

A 62-year-old woman presented with a chronic fever and fatigue. Biological investigations showed leukocytosis and elevation of acute phase markers. Liver blood tests showed deterioration with both cholestatic and hepatocellular patterns (there were, respectively, elevations in serum alkaline phosphatase levels as well as in serum alanine and aspartate aminotransferases). Viral serologies were negative. Mycobacterial infection and endocarditis were excluded. Results from blood cultures were negative. Autoantibody tests including ANCA (anti-neutrophil cytoplasmic antibody), anti-nuclear, anti-smooth muscle and anti-mitochondria were all negative. A liver biopsy revealed epithelioid granulomatous necrotizing vasculitis. Subsequently, immunological testing was repeated revealing MPO-ANCA (myeloperoxidase-ANCA). A diagnosis of ANCA-associated vasculitis with liver involvement was then made. The patient was started on steroids and her clinical state gradually improved.

一名 62 岁的妇女因长期发烧和疲劳而就诊。生物检查显示白细胞增多,急性期标志物升高。肝脏血液检查显示病情恶化,有胆汁淤积性和肝细胞性两种模式(血清碱性磷酸酶水平以及血清丙氨酸和天冬氨酸转氨酶分别升高)。病毒血清学检测呈阴性。排除了分枝杆菌感染和心内膜炎。血液培养结果为阴性。包括抗中性粒细胞胞浆抗体(ANCA)、抗核抗体、抗平滑肌抗体和抗线粒体抗体在内的自身抗体检测结果均为阴性。肝脏活检显示患者患有上皮样肉芽肿坏死性血管炎。随后,再次进行免疫学检测,发现 MPO-ANCA(髓过氧化物酶-ANCA)。诊断结果为 ANCA 相关性血管炎并累及肝脏。患者开始服用类固醇,临床症状逐渐好转。
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引用次数: 0
Editorial: plant-microbial symbiosis toward sustainable food security. 社论:植物与微生物共生,实现可持续粮食安全。
Pub Date : 2024-12-31 Epub Date: 2024-01-05 DOI: 10.1080/15592324.2023.2298054
Ixchel Campos-Avelar, Amelia C Montoya-Martínez, Fannie I Parra-Cota, Sergio de Los Santos-Villalobos

The use of plant-associated microorganisms is increasingly being investigated as a key tool for mitigating the impact of biotic and abiotic threats to crops and facilitating migration to sustainable agricultural practices. The microbiome is responsible for several functions in agroecosystems, such as the transformation of organic matter, nutrient cycling, and plant/pathogen growth regulation. As climate change and global warming are altering the dynamics of plant-microbial interactions in the ecosystem, it has become essential to perform comprehensive studies to decipher current and future microbial interactions, as their useful symbiotic mechanisms could be better exploited to achieve sustainable agriculture. This will allow for the development of effective microbial inoculants that facilitate nutrient supply for the plant at its minimal energy expense, thus increasing its resilience to biotic and abiotic stresses. This article collection aims to compile state-of-the-art research focused on the elucidation and optimization of symbiotic relationships between crops and their associated microbes. The information presented here will contribute to the development of next-generation microbial inoculants for achieving a more sustainable agriculture.

人们正越来越多地研究如何利用与植物相关的微生物,将其作为减轻生物和非生物威胁对作物的影响以及促进向可持续农业实践转变的重要工具。微生物群在农业生态系统中发挥着多种功能,如有机物转化、养分循环和植物/病原体生长调节。由于气候变化和全球变暖正在改变生态系统中植物与微生物相互作用的动态,因此有必要开展全面研究,破解当前和未来的微生物相互作用,因为可以更好地利用其有用的共生机制来实现可持续农业。这将有助于开发有效的微生物接种剂,以最小的能量消耗促进植物的营养供应,从而提高植物对生物和非生物压力的适应能力。本论文集旨在汇集有关阐明和优化作物与其相关微生物之间共生关系的最新研究成果。这里提供的信息将有助于开发下一代微生物接种剂,从而实现更可持续的农业发展。
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引用次数: 0
Autologous stem cell transplantation in adults with atypical teratoid rhabdoid tumor: a case report and review. 成人非典型畸胎性横纹肌瘤患者的自体干细胞移植:病例报告与综述。
Q1 Medicine Pub Date : 2024-12-31 Epub Date: 2024-07-23 DOI: 10.1080/20450907.2024.2375960
Jackson Griffith-Linsley, William Robert Bell, Aaron Cohen-Gadol, Diane Donegan, Angela Richardson, Michael Robertson, Kevin Shiue, Kathryn Nevel

Aim: Atypical teratoid rhabdoid tumor (ATRT) is a rare and highly aggressive primary CNS neoplasm, predominantly observed in children. The use of autologous stem cell transplantation (ASCT) in pediatric ATRT has shown promise; however, its utility in adult ATRT remains unclear. Patients & methods: This study presents the case of an adult patient with ATRT who is in remission after ASCT and reviews the literature on ASCT in adults with ATRT. Four cases of ATRT in adults who underwent ASCT were identified, with pertinent data summarized. Results: All five patients survived longer than the historical average survival rate, four of whom had no clinical or radiographic evidence of disease at the final follow-up. Conclusion: Based on limited data, there may be a role for ASCT in the treatment of adults with ATRT.

目的:非典型畸形横纹肌瘤(ATRT)是一种罕见、侵袭性极强的原发性中枢神经系统肿瘤,主要见于儿童。自体干细胞移植(ASCT)在小儿横纹肌瘤中的应用前景良好,但在成人横纹肌瘤中的应用仍不明确。患者与方法:本研究介绍了一例经ASCT治疗后病情缓解的成人ATRT患者,并回顾了有关ASCT治疗成人ATRT的文献。研究发现了四例接受ASCT治疗的成人ATRT病例,并总结了相关数据。结果:所有五名患者的存活时间都超过了历史平均存活率,其中四名患者在最后随访时没有临床或影像学疾病证据。结论:根据有限的数据,ASCT 在成人 ATRT 患者的治疗中可能发挥作用。
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引用次数: 0
Effects of flowering period on floral traits, pollinator behavior and seed production of David's mountain laurel (Sophora davidii). 花期对大卫山月桂(Sophora davidii)的花性状、授粉者行为和种子产量的影响。
Pub Date : 2024-12-31 Epub Date: 2024-07-27 DOI: 10.1080/15592324.2024.2383823
Chengtao Pan, Zhimin Chen, Mao Zhang, Xiangsheng Chen, Guy Smagghe, Mingyu Fan, Zhimin Chang, Lili Zhao, Jiankun Long

Sophora davidii is a cross-pollinated plant with important ecological protection and medicinal value in China, but its seed yield is low due to backward and nonstandard production technology. Therefore, we divide the flowering period of Sophora davidii into initial, full and final flowering period, measuring the floral morphology, pollen viability, stigma receptivity, nectar volume and nectar concentration, foraging behavior of pollinators, fertilization physiology, seed yield and quality through field observation and indoor testing to explore whether the flowering period affects the floral traits, pollinator behavior and seed production of plants. Our results revealed that the nectar volume, nectar concentration, pollen viability and stigma receptivity at full flowering period were the highest. The single visit time and visit time per flower of Chinese honey bees were the longest in the full flowering period, while the number of transfer, visit frequency and number of touching stigma were the least. The visiting number of the bees was the most and the most active in the full flowering period. The bees pollination not only improved the pollen amount, germination rate, pollen tube length and the ovule number of S. davidii, but also their effect was the most obvious in full flowering period. The principal component analysis showed that pollination by Chinese honey bees during the whole flowering period of S. davidii was the best way to produce seeds. We can conclude that flowering period affects flower traits, foraging behavior of pollinators, seed yield and quality of S. davidii.

大叶女贞是我国具有重要生态保护价值和药用价值的异花授粉植物,但由于生产技术落后、不规范,其种子产量较低。因此,我们将大叶女贞的花期分为初花期、盛花期和终花期,通过田间观察和室内试验,测定其花朵形态、花粉活力、柱头接受性、花蜜量和花蜜浓度、传粉昆虫觅食行为、受精生理、种子产量和质量等,探讨花期是否影响植物的花性状、传粉昆虫行为和种子产量。结果表明,盛花期的花蜜量、花蜜浓度、花粉活力和柱头受精率最高。中华蜜蜂在盛花期的单次访花时间和每朵花的访花时间最长,而转移次数、访花频率和接触柱头次数最少。蜜蜂的访花次数在盛花期最多,也最活跃。蜜蜂授粉不仅提高了大卫矛的花粉量、发芽率、花粉管长度和胚珠数,而且在盛花期效果最明显。主成分分析表明,中华蜜蜂在大叶女贞整个花期的授粉效果最好。由此我们可以得出结论,花期对大叶黄杨的花朵性状、传粉昆虫的觅食行为、种子产量和质量都有影响。
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引用次数: 0
Resilience of Primary Health Care in Ukraine: Challenges of the Pandemic and War. 乌克兰初级卫生保健的复原力:大流行病和战争的挑战。
Pub Date : 2024-12-31 Epub Date: 2024-06-14 DOI: 10.1080/23288604.2024.2352885
Elina Dale, Julia Novak, Denys Dmytriiev, Olga Demeshko, Jarno Habicht

This commentary examines the resilience of primary health care in Ukraine amidst the ongoing war, drawing a few reflections relevant for other fragile and conflict-affected situations. Using personal observations and various published and unpublished reports, this article outlines five reflections on the strengths, challenges, and necessary adaptations of Primary Health Care (PHC) in Ukraine. It underscores the concerted efforts of the government to maintain public financing of PHC, thereby averting system collapse. The research also highlights the role of strategic adaptations during the COVID-19 pandemic in fostering resilience during the war, including the widespread use of digital communication and skills training. The commentary emphasizes the role of managerial and financial autonomy in facilitating quick and efficient organizational response to crisis. It also recognizes emerging challenges, including better access to PHC services among the internally displaced persons, shifting patient profiles and service needs, and challenges related to reliance on local government financing. Finally, the authors advocate for a coordinated approach in humanitarian response, recovery efforts, and development programs to ensure the sustainability and effectiveness of PHC in Ukraine.

这篇评论探讨了乌克兰初级卫生保健在持续战争中的恢复能力,并提出了一些与其他脆弱和受冲突影响局势相关的思考。通过个人观察以及各种已发表和未发表的报告,本文概述了对乌克兰初级卫生保健(PHC)的优势、挑战和必要调整的五点思考。文章强调了政府为维持初级卫生保健的公共筹资所做的共同努力,从而避免了系统的崩溃。研究还强调了在 COVID-19 大流行期间,战略调整在促进战争期间复原力方面的作用,包括广泛使用数字通信和技能培训。评论强调了管理和财务自主权在促进组织快速高效地应对危机方面的作用。评论还认识到了新出现的挑战,包括境内流离失所者更容易获得初级保健服务、病人情况和服务需求的变化以及与依赖地方政府融资有关的挑战。最后,作者主张在人道主义响应、恢复工作和发展计划中采用协调的方法,以确保乌克兰初级保健服务的可持续性和有效性。
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引用次数: 0
Development of brain metastases in non-small-cell lung cancer: high-risk features. 非小细胞肺癌脑转移的发展:高风险特征。
Q1 Medicine Pub Date : 2024-12-31 Epub Date: 2024-09-12 DOI: 10.1080/20450907.2024.2395804
Nolan Winslow, Jacqueline Boyle, William Miller, Yanzhi Wang, Francois Geoffroy, Andrew J Tsung

Aim: Brain metastases (BM) are a common site of disease progression and treatment failure in non-small-cell lung cancer (NSCLC) and can be identified in up to 30-50% of patients. Although they are common, there is no standardized screening protocol for development of BM in NSCLC. Multiple clinical variables predict increased BM occurrence, and, when present, should be used to initiate screening MRI.Materials & methods: We performed a single center retrospective review of NSCLC patients, examining BM development and overall survival. Available clinical, radiographic and molecular data were reviewed for association with BM and overall survival. A predictive model for BM development was created for multivariate analysis.Results: Risk factors for new BM development in NSCLC included younger age, larger primary lung tumor, Karnofsky performance score (KPS) <70, pre-existing liver or bone metastases, large cell histology and family history of cancer. Factors associated with decreased OS were larger primary lung tumor, extracranial metastases at time of diagnosis, large cell histology and poorly-differentiated carcinoma histology.Conclusion: There are multiple high risk features for developing BM in NSCLC. Each of these factors should routinely be investigated, and presence should prompt brain MRI to allow earlier diagnosis and treatment of BM.

目的:脑转移瘤(BM)是非小细胞肺癌(NSCLC)疾病进展和治疗失败的常见部位,可在高达 30-50% 的患者中发现。虽然脑干瘤很常见,但目前还没有针对非小细胞肺癌脑干瘤的标准化筛查方案。多种临床变量可预测BM发生率的增加,一旦出现,应立即启动磁共振成像筛查:我们对单个中心的 NSCLC 患者进行了回顾性分析,研究了 BM 的发展和总生存率。我们对现有的临床、影像学和分子数据进行了回顾性分析,以确定其与骨髓瘤和总生存率之间的关联。为多变量分析建立了骨髓瘤发生的预测模型:结果:NSCLC发生新BM的风险因素包括年龄较小、原发肺肿瘤较大、Karnofsky表现评分(KPS):NSCLC发生BM有多种高风险特征。这些因素中的每一个都应进行常规检查,出现这些因素时应及时进行脑磁共振成像检查,以便更早地诊断和治疗 BM。
{"title":"Development of brain metastases in non-small-cell lung cancer: high-risk features.","authors":"Nolan Winslow, Jacqueline Boyle, William Miller, Yanzhi Wang, Francois Geoffroy, Andrew J Tsung","doi":"10.1080/20450907.2024.2395804","DOIUrl":"https://doi.org/10.1080/20450907.2024.2395804","url":null,"abstract":"<p><p><b>Aim:</b> Brain metastases (BM) are a common site of disease progression and treatment failure in non-small-cell lung cancer (NSCLC) and can be identified in up to 30-50% of patients. Although they are common, there is no standardized screening protocol for development of BM in NSCLC. Multiple clinical variables predict increased BM occurrence, and, when present, should be used to initiate screening MRI.<b>Materials & methods:</b> We performed a single center retrospective review of NSCLC patients, examining BM development and overall survival. Available clinical, radiographic and molecular data were reviewed for association with BM and overall survival. A predictive model for BM development was created for multivariate analysis.<b>Results:</b> Risk factors for new BM development in NSCLC included younger age, larger primary lung tumor, Karnofsky performance score (KPS) <70, pre-existing liver or bone metastases, large cell histology and family history of cancer. Factors associated with decreased OS were larger primary lung tumor, extracranial metastases at time of diagnosis, large cell histology and poorly-differentiated carcinoma histology.<b>Conclusion:</b> There are multiple high risk features for developing BM in NSCLC. Each of these factors should routinely be investigated, and presence should prompt brain MRI to allow earlier diagnosis and treatment of BM.</p>","PeriodicalId":10469,"journal":{"name":"CNS Oncology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11404603/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142281455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nitric oxide and cytokinin cross-talk and their role in plant hypoxia response. 一氧化氮和细胞分裂素的交叉作用及其在植物缺氧反应中的作用
Pub Date : 2024-12-31 Epub Date: 2024-03-24 DOI: 10.1080/15592324.2024.2329841
Felix Lutter, Wolfram Brenner, Franziska Krajinski-Barth, Vajiheh Safavi-Rizi

Nitric oxide (NO) and cytokinins (CKs) are known for their crucial contributions to plant development, growth, senescence, and stress response. Despite the importance of both signals in stress responses, their interaction remains largely unexplored. The interplay between NO and CKs emerges as particularly significant not only regarding plant growth and development but also in addressing plant stress response, particularly in the context of extreme weather events leading to yield loss. In this review, we summarize NO and CKs metabolism and signaling. Additionally, we emphasize the crosstalk between NO and CKs, underscoring its potential impact on stress response, with a focus on hypoxia tolerance. Finally, we address the most urgent questions that demand answers and offer recommendations for future research endeavors.

众所周知,一氧化氮(NO)和细胞分裂素(CKs)对植物的发育、生长、衰老和胁迫响应有着至关重要的贡献。尽管这两种信号在胁迫响应中都很重要,但它们之间的相互作用在很大程度上仍未得到探索。NO 和 CKs 之间的相互作用不仅对植物的生长和发育具有重要意义,而且对植物的胁迫响应也具有重要意义,尤其是在极端天气事件导致减产的情况下。在这篇综述中,我们总结了 NO 和 CKs 的新陈代谢和信号转导。此外,我们还强调了 NO 和 CKs 之间的相互影响,强调了其对胁迫响应的潜在影响,重点是缺氧耐受性。最后,我们探讨了亟待解决的问题,并对未来的研究工作提出了建议。
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引用次数: 0
Highly efficient CRISPR/Cas9-RNP mediated CaPAD1 editing in protoplasts of three pepper (Capsicum annuum L.) cultivars. 在三种辣椒(Capsicum annuum L.)栽培品种的原生质体中高效进行 CRISPR/Cas9-RNP 介导的 CaPAD1 编辑。
Pub Date : 2024-12-31 Epub Date: 2024-07-25 DOI: 10.1080/15592324.2024.2383822
Hanyi Choi, Hyunjae Shin, Chan Yong Kim, Jeongbin Park, Hyeran Kim

Parthenocarpy, characterized by seedless fruit development without pollination or fertilization, offers the advantage of consistent fruit formation, even under challenging conditions such as high temperatures. It can be induced by regulating auxin homeostasis; PAD1 (PARENTAL ADVICE-1) is an inducer of parthenocarpy in Solanaceae plants. However, precise editing of PAD1 is not well studied in peppers. Here, we report a highly efficient clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) ribonucleoprotein (RNP) for CaPAD1 editing in three valuable cultivars of pepper (Capsicum annuum L.): Dempsey, a gene-editable bell pepper; C15, a transformable commercial inbred line; and Younggo 4, a Korean landrace. To achieve the seedless pepper trait under high temperatures caused by unstable climate change, we designed five single guide RNAs (sgRNAs) targeting the CaPAD1 gene. We evaluated the in vitro on-target activity of the RNP complexes in three cultivars. Subsequently, we introduced five CRISPR/Cas9-RNP complexes into protoplasts isolated from three pepper leaves and compared indel frequencies and patterns through targeted deep sequencing analyses. We selected two sgRNAs, sgRNA2 and sgRNA5, which had high in vivo target efficiencies for the CaPAD1 gene across the three cultivars and were validated as potential off-targets in their genomes. These findings are expected to be valuable tools for developing new seedless pepper cultivars through precise molecular breeding of recalcitrant crops in response to climate change.

孤雌生殖的特点是在没有授粉或受精的情况下发育出无籽果实,其优点是即使在高温等挑战性条件下也能持续形成果实。孤雌生殖可以通过调节辅助素平衡来诱导;PAD1(PARENTAL ADVICE-1)是茄科植物孤雌生殖的诱导剂。然而,在辣椒中对 PAD1 的精确编辑还没有很好的研究。在这里,我们报告了一种高效的簇状有规则间隔短回文重复序列(CRISPR)/CRISPR相关蛋白9(Cas9)核糖核蛋白(RNP),用于在三种有价值的辣椒(Capsicum annuum L.)栽培品种中编辑CaPAD1:这三个品种是:可进行基因编辑的甜椒 Dempsey、可转化的商业近交系 C15 和韩国陆地栽培品种 Younggo 4。为了在不稳定的气候变化导致的高温条件下实现辣椒的无籽性状,我们设计了五个靶向 CaPAD1 基因的单导 RNA(sgRNA)。我们在三个栽培品种中评估了 RNP 复合物的体外靶上活性。随后,我们将五个 CRISPR/Cas9-RNP 复合物导入从三个辣椒叶片中分离出来的原生质体中,并通过靶向深度测序分析比较了吲哚频率和模式。我们选择了两个 sgRNA,即 sgRNA2 和 sgRNA5,这两个 sgRNA 在三个栽培品种中对 CaPAD1 基因都有很高的体内靶向效率,并被验证为其基因组中潜在的非靶标。这些发现有望成为宝贵的工具,用于通过精确的分子育种培育新的无籽辣椒栽培品种,以应对气候变化。
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引用次数: 0
Cloning and functional validation of DsWRKY6 gene from Desmodium styracifolium. Desmodium styracifolium 的 DsWRKY6 基因的克隆和功能验证。
Pub Date : 2024-12-31 Epub Date: 2024-05-14 DOI: 10.1080/15592324.2024.2349868
Qilin Yang, Jinheng Huang, Xiaofeng Nie, XiaoMin Tang, Peiran Liao, Quan Yang

The purpose of this study was to analyze the role of transcription factor in Desmodium styracifolium, proving that the DsWRKY6 transcription factor was related to the plant phenotypes of Desmodium styracifolium - cv. 'GuangYaoDa1' and it could be used in molecular-assisted breeding. 'GuangYaoDa1' was used as the material and its DNA was the template to clone DsWRKY6, the transgenic Arabidopsis thaliana line was constructed by agrobacterium tumefaciens‑mediated transformation. Transgenic Arabidopsis thaliana was cultivated to study phenotype and physiological and biochemical indexes. Phenotypic observation showed that DsWRKY6 transgenic Arabidopsis thaliana had a faster growth rate while compared with the control group, they had longer lengths of main stem, lateral branches of cauline leaves, and root, but a lower number of cauline leaves and lateral branches of cauline leaves. And it also showed that their flowering and fruiting periods were advanced. The results of physiological and biochemical indexes showed that the relative expressions of DsWRKY6 increased and the abscisic acid content significantly increased in DsWRKY6 transgenic Arabidopsis thaliana compared with the control group. According to the above results, DsWRKY6 could regulate the advancing of flowering and fruiting periods caused by the improvement of abscisic acid content, and expression of the DsWRKY6 transcription factor might be the cause of the upright growth of 'GuangYaoDa1'.

本研究旨在分析转录因子在Desmodium styracifolium中的作用,证明DsWRKY6转录因子与Desmodium styracifolium - cv. 'GuangYaoDa1'的植株表型有关,可用于分子辅助育种。以'广药大1号'为材料,以其DNA为模板克隆DsWRKY6,通过农杆菌介导的转化构建转基因拟南芥品系。对转基因拟南芥进行了表型和生理生化指标的研究。表型观察结果表明,与对照组相比,DsWRKY6转基因拟南芥的生长速度更快,主茎、茎叶侧枝和根的长度更长,但茎叶和茎叶侧枝的数量较少。这也表明它们的花期和果期都提前了。生理生化指标结果表明,与对照组相比,DsWRKY6转基因拟南芥中DsWRKY6的相对表达量增加,赤霉酸含量显著增加。根据上述结果,DsWRKY6能调控脱落酸含量提高引起的花果期提前,DsWRKY6转录因子的表达可能是'广药大1号'直立生长的原因。
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引用次数: 0
Drought-induced molecular changes in crown of various barley phytohormone mutants. 干旱诱导的各种大麦植物激素突变体树冠的分子变化。
Pub Date : 2024-12-31 Epub Date: 2024-06-26 DOI: 10.1080/15592324.2024.2371693
Anetta Kuczyńska, Martyna Michałek, Piotr Ogrodowicz, Michał Kempa, Natalia Witaszak, Michał Dziurka, Damian Gruszka, Agata Daszkowska-Golec, Iwona Szarejko, Paweł Krajewski, Krzysztof Mikołajczak

One of the main signal transduction pathways that modulate plant growth and stress responses, including drought, is the action of phytohormones. Recent advances in omics approaches have facilitated the exploration of plant genomes. However, the molecular mechanisms underlying the response in the crown of barley, which plays an essential role in plant performance under stress conditions and regeneration after stress treatment, remain largely unclear. The objective of the present study was the elucidation of drought-induced molecular reactions in the crowns of different barley phytohormone mutants. We verified the hypothesis that defects of gibberellins, brassinosteroids, and strigolactones action affect the transcriptomic, proteomic, and hormonal response of barley crown to the transitory drought influencing plant development under stress. Moreover, we assumed that due to the strong connection between strigolactones and branching the hvdwarf14.d mutant, with dysfunctional receptor of strigolactones, manifests the most abundant alternations in crowns and phenotype under drought. Finally, we expected to identify components underlying the core response to drought which are independent of the genetic background. Large-scale analyses were conducted using gibberellins-biosynthesis, brassinosteroids-signaling, and strigolactones-signaling mutants, as well as reference genotypes. Detailed phenotypic evaluation was also conducted. The obtained results clearly demonstrated that hormonal disorders caused by mutations in the HvGA20ox2, HvBRI1, and HvD14 genes affected the multifaceted reaction of crowns to drought, although the expression of these genes was not induced by stress. The study further detected not only genes and proteins that were involved in the drought response and reacted specifically in mutants compared to the reaction of reference genotypes and vice versa, but also the candidates that may underlie the genotype-universal stress response. Furthermore, candidate genes involved in phytohormonal interactions during the drought response were identified. We also found that the interplay between hormones, especially gibberellins and auxins, as well as strigolactones and cytokinins may be associated with the regulation of branching in crowns exposed to drought. Overall, the present study provides novel insights into the molecular drought-induced responses that occur in barley crowns.

植物激素的作用是调节植物生长和胁迫反应(包括干旱)的主要信号转导途径之一。近年来,全息方法的进步促进了对植物基因组的探索。然而,大麦树冠在植物在胁迫条件下的表现和胁迫处理后的再生中起着至关重要的作用,其反应的分子机制在很大程度上仍不清楚。本研究的目的是阐明不同大麦植物激素突变体树冠中干旱诱导的分子反应。我们验证了一个假设,即赤霉素、铜素类固醇和赤霉内酯的作用缺陷会影响大麦树冠对暂时性干旱的转录组、蛋白质组和激素反应,从而影响植物在胁迫下的生长发育。此外,我们假定,由于赤霉内酯与分枝之间的密切联系,赤霉内酯受体功能失调的 hvdwarf14.d 突变体在干旱条件下表现出最丰富的树冠和表型变化。最后,我们希望找出与遗传背景无关的干旱核心反应的基本成分。我们利用赤霉素-生物合成、铜素类固醇-信号转导和赤霉内酯-信号转导突变体以及参考基因型进行了大规模分析。还进行了详细的表型评估。研究结果清楚地表明,HvGA20ox2、HvBRI1 和 HvD14 基因突变导致的激素紊乱影响了树冠对干旱的多方面反应,尽管这些基因的表达并未受到胁迫的诱导。该研究不仅进一步发现了参与干旱响应的基因和蛋白质,这些基因和蛋白质在突变体中的反应与参考基因型的反应相比具有特异性,反之亦然。此外,我们还发现了在干旱响应过程中参与植物激素相互作用的候选基因。我们还发现,激素(尤其是赤霉素和辅酶)以及赤霉内酯和细胞分裂素之间的相互作用可能与干旱下树冠分枝的调控有关。总之,本研究为大麦树冠中发生的干旱诱导的分子反应提供了新的见解。
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