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382篇 您的检索式:作者名="Agustin"
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1Steps to consider in the approach and management of critically ill patient with spontaneous intracerebral hemorrhage显示文摘Spontaneous intracerebral hemorrhage is a type of stroke associated with poor outcomes. Mortality is elevated, especially in the acute phase. From a pathophysiological point of view the bleeding must traverse different stages dominated by the possibility of re-bleeding, edema, intracranial hypertension, inflammation and neurotoxicity due to blood degradation products, mainly hemoglobin and thrombin. Neurological deterioration and death are common in early hours, so it is a true neurologicalneurosurgical emergency. Time is brain so that action should be taken fast and accurately. The most significant prognostic factors are level of consciousness, location, volume and ventricular extension of the bleeding. Nihilism and early withdrawal of active therapy undoubtedly influence the final result. Although there are no proven therapeutic measures, treatment should be individualized and guided preferably by pathophysiology. The multidisciplinary teamwork is essential. Results of recently completed studies have birth to promising new strategies. For correct management it's important to establish an orderly and systematic strategy based on clinical stabilization, evaluation and establishment of prognosis, avoiding secondary insults and adoption of specific individualized therapies, including hemostatic therapy and intensive control of elevated blood pressure. Uncertainty continues regarding the role of surgery.Daniel Agustin Godoy Gustavo Rene Pi?ero Patricia Koller Luca Masotti Mario Di Napoli 2015World Journal of Critical Care Medicine2015,4,3:14
2drug-induced autoimmune liver disease:a diagnostic dilemma of an increasingly reported disease显示文摘The aetiology of autoimmune hepatitis(AIH) is uncer-tain but the disease can be triggered in susceptible patients by external factors such as viruses or drugs.AIH usually develops in individuals with a genetic back-ground mainly consisting of some risk alleles of the major histocompatibility complex(HLA).Many drugs have been linked to AIH phenotypes,which sometimes persist after drug discontinuation,suggesting that they awaken latent autoimmunity.At least three clini-cal scenarios have been proposed that refers to drug- induced autoimmune liver disease(DIAILD):AIH with drug-induced liver injury(DILI); drug induced-AIH(DI-AIH); and immune mediated DILI(IM-DILI).In addi-tion,there are instances showing mixed features of DI-AIH and IM-DILI,as well as DILI cases with positive autoantibodies.Histologically distinguishing DILI from AIH remains a challenge.Even more challenging is the differentiation of AIH from DI-AIH mainly relying in histological features; however,a detailed standard-ised histologic evaluation of large cohorts of AIH and DI-AIH patients would probably render more subtle features that could be of help in the differential diag-nosis between both entities.Growing information on the relationship of drugs and AIH is being available,being drugs like statins and biologic agents more fre-quently involved in cases of DIAILD.In addition,there is some evidence on the fact that patients diagnosed with DIAILD may have had a previous episode of hepa-totoxicity.Further collaborative studies in DIAILD will strengthen the knowledge and understanding of this intriguing and complex disorder which might represent different phenotypes across the spectrum ofAgustin Castiella Eva Zapata M Isabel Lucena Raúl J Andrade 2014World Journal of Hepatology2014,6,4:13
3How important is donor age in liver transplantation?显示文摘The age of liver donors has been increasing in the past several years because of a donor shortage. In the United States, 33% of donors are age 50 years or older, as are more than 50% in some European countries. The impact of donor age on liver transplantation(LT) has been analyzed in several studies with contradictory conclusions. Nevertheless, recent analyses of the largest databases demonstrate that having an older donor is a risk factor for graft failure. Donor age is included as a risk factor in the more relevant graft survival scores, such as the Donor Risk Index, donor age and Model for End-stage Liver Disease, Survival Outcomes Following Liver Transplantation, and the Balance of Risk. The use of old donors is related to an increased rate of biliary complications and hepatitis C virus-related graft failure. Although liver function does not seem to be significantly affected by age, the incidence of several liver diseases increases with age, and the capacity of the liver to manage or overcome liver diseases or external injuries decreases. In this paper, the importance of age in LT outcomes, the role of donor age as a risk factor, and the influence of aging on liver regeneration are reviewed.Alberto Lué Estela Solanas Pedro Baptista Sara Lorente Juan J Araiz Agustin Garcia-Gil M Trinidad Serrano 2016World Journal of Gastroenterology2016,22,21:10
4二倍体香蕉种质资源花粉活力检测方法的筛选显示文摘本研究利用4种父本育性较强的二倍体香蕉(Musa spp.)种质,比较不同染色法和离体萌发法检测香蕉花粉活力的效果,以期筛选适合香蕉花粉活力快速检测的方法。结果显示:醋酸洋红和I-KI染色法处理后的香蕉花粉形态较模糊,而TTC法与MTT法的染色效果较好,花粉形态较清晰,容易区分染色与未染色的花粉;适合香蕉花粉离体萌发的培养基中,蔗糖浓度为15%,pH值为5.8;MTT染色法结果与离体萌发法结果相关性最好,说明MTT染色法的结果较其他染色法准确、可靠。利用MTT染色法,本研究比较了17份二倍体香蕉种质的花粉活力,结果显示:‘Calcutta 4’(M.acuminata ssp.burmannicoides(AA))、BGY3(M.balbisiana(BB))、Malaccensis(M.acuminata ssp.malaccensis(AA))、Balbisiana(M.balbisiana(BB))等4份野生类型种质,以及双单倍体种质‘CIRAD 930’(M.acuminata ssp.malaccensis var.DH Pahang(AA))的染色率超过50%,而3份改良二倍体种质和4份栽培类型种质的染色率低于30%。邓彪 盛鸥 魏岳荣 李大志 高慧君 邝瑞彬 易干军 Agustin B.Molina 2014分子植物育种2014,12,5:6
5Study on Characteristics of Co-firing Ammonia/Methane Fuels under Oxygen Enriched Combustion Conditions显示文摘Having a background of utilising ammonia as an alternative fuel for power generation, exploring the feasibility of co-firing ammonia with methane is proposed to use ammonia to substitute conventional natural gas. However, improvement of the combustion of such fuels can be achieved using conditions that enable an increase of oxygenation, thus fomenting the combustion process of a slower reactive molecule as ammonia. Therefore, the present study looks at oxygen enriched combustion technologies, a proposed concept to improve the performance of ammonia/methane combustion. To investigate the characteristics of ammonia/methane combustion under oxygen enriched conditions, adiabatic burning velocity and burner stabilized laminar flame emissions were studied. Simulation results show that the oxygen enriched method can help to significantly enhance the propagation of ammonia/methane combustion without changing the emission level, which would be quite promising for the design of systems using this fuel for practical applications. Furthermore, to produce low computational-cost flame chemistry for detailed numerical analyses for future combustion studies, three reduced combustion mechanisms of the well-known Konnov's mechanism were compared in ammonia/methane flame simulations under practical gas turbine combustor conditions. Results show that the reduced reaction mechanisms can provide good results for further analyses of oxygen enriched combustion of ammonia/methane. The results obtained in this study also allow gas turbine designers and modellers to choose the most suitable mechanism for further combustion studies and development.XIAO Hua WANG Zhaolin VALERA-MEDINA Agustin BOWEN Philip J 2018Journal of Thermal Science2018,27,3:6
6Perioperative blood transfusion decreases long-term survival in pediatric living donor liver transplantation显示文摘BACKGROUND The impact of perioperative blood transfusion on short-and long-term outcomes in pediatric living donor liver transplantation(PLDLT)must still be ascertained,mainly among young children.Clinical and surgical postoperative complications related to perioperative blood transfusion are well described up to three months after adult liver transplantation.AIM To determine whether transfusion is associated with early and late postoperative complications and mortality in small patients undergoing PLDLT.METHODS We evaluated the effects of perioperative transfusion on postoperative complications in recipients up to 20 kg of body weight,submitted to PLDLT.A total of 240 patients were retrospectively allocated into two groups according to postoperative complications:Minor complications(n=109)and major complications(n=131).Multiple logistic regression analysis identified the volume of perioperative packed red blood cells(RBC)transfusion as the only independent risk factor for major postoperative complications.The receiver operating characteristic curve was drawn to identify the optimal volume of the perioperative RBC transfusion related to the presence of major postoperative complications,defining a cutoff point of 27.5 mL/kg.Subsequently,patients were reallocated to a low-volume transfusion group(LTr;n=103,RBC≤27.5 mL/kg)and a high-volume transfusion group(HTr;n=137,RBC>27.5 mL/kg)so that the outcome could be analyzed.RESULTS High-volume transfusion was associated with an increased number of major complications and mortality during hospitalization up to a 10-year follow-up period.During a short-term period,the HTr showed an increase in major infectious,cardiovascular,respiratory,and bleeding complications,with a decrease in rejection complications compared to the LTr.Over a long-term period,the HTr showed an increase in major infectious,cardiovascular,respiratory,and minor neoplastic complications,with a decrease in rejection complications.Additionally,Cox hazard regression found that high-volume RBC transfusion increased the mortality risk by 3.031-fold compared to low-volume transfusion.The Kaplan-Meier survival curves of the studied groups were compared using log-rank tests and the analysis showed significantly decreased graft survival,but with no impact in patient survival related to major complications.On the other hand,there was a significant decrease in both graft and patient survival,with high-volume RBC transfusion.CONCLUSION Transfusion of RBC volume higher than 27.5 mL/kg during the perioperative period is associated with a significant increase in short-and long-term postoperative morbidity and mortality after PLDLT.Karina Gordon Estela Regina Ramos Figueira Joel Avancini Rocha-Filho Luiz Antonio Mondadori Eduardo Henrique Giroud Joaquim Joao Seda-Neto Eduardo Antunes da Fonseca Renata Pereira Sustovitch Pugliese Agustin Moscoso Vintimilla Jose Otavio Costa Auler Jr Maria Jose Carvalho Carmona Luiz Augusto Carneiro D'Alburquerque 2021World Journal of Gastroenterology2021,27,12:6
7The “Brain Stress Timing” phenomenon and other misinterpretations of randomized clinical trial on aneurysmal subarachnoid hemorrhage显示文摘Clipping and coiling are currently the two alternatives in treatment of ruptured cerebral aneurysms. In spite of some meritorious analysis, further discussion is helpful to understand the actual state of art. Retreatment and rebleeding rates clearly favors clipping, although short-term functional outcome seems to be beneficial for clipping, while this different is not such if we perform the comparison at a longer follow up. Longterm follow ups and cost analysis are mandatory to have a clear view of the current picture in treatment of subarachnoid hemorrhage. Treatment strategy should be made by a multi-disciplinary team in accredited centers with proficient experience in both techniques.Rafael Martinez-Perez Natalia Rayo Agustin Montivero Jorge Marcelo Mura 2019Neural Regeneration Research2019,14,8:5
8Incretins and selective renal sodium-glucose co-transporter 2 inhibitors in hypertension and coronary heart disease显示文摘Hyperglycemia is associated with an increased risk of cardiovascular disease,and the consequences ofintensive therapy may depend on the mechanism of the anti-diabetic agent(s)used to achieve a tight control.In animal models,stable analogues of glucagon-like peptide-1(GLP-1)were able to reduce body weight and blood pressure and also had favorable effects on ischemia following coronary reperfusion.In a similar way,dipeptidyl peptidase IV(DPPIV)showed to have favorable effects in animal models of ischemia/reperfusion.This could be due to the fact that DPPIV inhibitors were able to prevent the breakdown of GLP-1 and glucose-dependent insulinotropic polypeptide,but they also decreased the degradation of several vasoactive peptides.Preclinical data for GLP-1,its derivatives and inhibitors of the DPPIV enzyme degradation suggests that these agents may be able to,besides controlling glycaemia,induce cardio-protective and vasodilator effects.Notwithstanding the many favorable cardiovascular effects of GLP-1/incretins reported in different studies,many questions remain unanswered due the limited number of studies in human beings that aim to examine the effects of GLP-1 on cardiovascular endpoints.For this reason,long-term trials searching for positive cardiovascular effects are now in process,such as the CAROLINA and CARMELINA trials,which are supported by small pilot studies performed in humans(and many more animal studies)with incretin-based therapies.On the other hand,selective renal sodium-glucose co-transporter 2 inhibitors were also evaluated in the prevention of cardiovascular outcomes in type 2 diabetes.However,it is quite early to draw conclusions,since data on cardiovascular outcomes and cardiovascular death are limited and long-term studies are still ongoing.In this review,we will analyze the mechanisms underlying the cardiovascular effects of incretins and,at the same time,we will present a critical position about the real value of these compounds in the cardiovascular system and its protection.Ramiro A Sanchez Hugo Sanabria Cecilia de los Santos Agustin J Ramirez 2015World Journal of Diabetes2015,6,11:5
9HASTY modulates miRNA biogenesis by linking pri-miRNA transcription and processing显示文摘Post-transcriptional gene silencing mediated by microRNAs(miRNAs)modulates numerous developmental and stress response pathways.For the last two decades,HASTY(HST),the ortholog of human EXPORTIN 5,was considered to be a candidate protein that exports plant miRNAs from the nucleus to the cytoplasm.Here,we report that HST functions in the miRNA pathway independent of its cargo-exporting activity in Arabidopsis.We found that Arabidopsis mutants with impaired HST shuttling exhibit normal subcellular distribution of miRNAs.Interestingly,protein-protein interaction and microscopy assays showed that HST directly interacts with the microprocessor core component DCL1 through its N-terminal domain.Moreover,mass spectrometry analysis revealed that HST also interacts independently of its N-terminal domain with the mediator complex subunit MED37.Further experiments revealed that HST could act as a scaffold to facilitate the recruitment of DCL1 to genomic MIRNA loci by stabilizing the DCL1-MED37 complex,which in turn promotes the transcription and proper processing of primary miRNA transcripts(primiRNAs).Taken together,these results suggest that HST is likely associated with the formation of the miRNA biogenesis complex at MIRNA genes,promoting the transcription and processing of primiRNAs rather than the direct export of processed miRNAs from the nucleus.Damian A.Cambiagno Axel J.Giudicatti Agustin L.Arce Delfina Gagliardi Lei Li Wei Yuan Derek S.Lundberg Detlef Weigel Pablo A.Manavella 2021Molecular Plant2021,14,3:5
10Outcome in obscure gastrointestinal bleeding after capsule endoscopy显示文摘AIM: To investigate the clinical impact of capsule endoscopy(CE) after an obscure gastrointestinal bleeding(OGIB) episode, focusing on diagnostic work-up, followup and predictive factors of rebleeding. METHODS: Patients who were referred to Hospital del Mar(Barcelona, Spain) between 2007 and 2009 for OGIB who underwent a CE were retrospectively analyzed. Demographic data, current treatment with non-steroid antiinflammtory drugs or anticoagulant drugs, hemoglobin levels, transfusion requirements, previous diagnostic tests for the bleeding episode, as well as CE findings(significant or non-significant), work-up and patient out-comes were analyzed from electronic charts. Variables were compared by χ 2 analysis and Student t test. Risk factors of rebleeding were assessed by Log-rank test, Kaplan-Meier curves and Cox regression model. RESULTS: There were 105 patients [45.7% women, median age of 72 years old(interquartile range 56-79)] and a median follow-up of 326 d(interquartile range 123-641) included in this study. The overall diagnostic yield of CE was 58.1%(55.2% and 63.2%, for patients with occult OGIB and overt OGIB, respectively). In 73 patients(69.5%), OGIB was resolved. Multivariate analysis showed that hemoglobin levels lower than 8 g/dL at diagnosis [hazard ratios(HR) = 2.7, 95%CI: 1.9-6.3], patients aged 70 years and above(HR = 2.1, 95%CI: 1.2-6.1) and significant findings in CE(HR = 2.4, 95%CI: 1.1-5.8) were independent predictors of rebleeding. CONCLUSION: One third of the patients presented with rebleeding after CE; risk factors were hemoglobin levels < 8 g/dL, age ≥ 70 years or the presence of significant lesions.Alex Caas-Ventura Lucia Márque Xavier Bessa Josep Maria DedeuDepartment of Gastroenterology Hospital del Mar Research Institute Pompeu Fabra University Marc Puigvehí Sílvia Delgado-Aros Ines Ana Ibáez Agustin Seoane Luis Barranco Felipe Bory Montserrat Andreu Begoa González-Suárez 2013World Journal of Gastrointestinal Endoscopy2013,5,11:4
11对明串珠菌及其他细菌的抑制效果显示文摘在从压榨间直到蔗汁澄清的蔗糖生产过程中,蔗汁中微生物活动是破坏蔗糖品质的一个重要因素。蔗糖损失和葡聚糖的形成通常与蔗汁中微生物引起的变质有关。多年来,这一直成为糖厂试图改善蔗糖品质时所面临的问题。本文以直接影响得糖率的微生物减少和相对纯度为指标,研究了不同杀菌方法在蔗汁中的效果。浓度为0.007%的S抑制剂显示了对某糖厂初压汁和混合汁中的微生物菌群的抗菌效应。在对照组中,12h后观察到4.8单位的纯度降低。加入S抑制剂后,只降低2个单位。且蔗汁的稳定性在3个样品中几乎完全一致。以S抑制剂处理的蔗汁保持深褐色和清新的气味,且pH与初始相比无显著变化,而未处理的蔗汁变浅褐色,产生很强的酒味,pH和纯度显著降低。这种稳定效应尚未被其他常用的糖用杀菌剂所报导。同样,本文证明了有可能通过使用S抑制剂来稳定混合汁。经S抑制剂处理后,游离的还原物质和多聚糖比不经处理的样品低6倍。这些结果表明,形成的葡聚糖以及随之形成的游离果糖减少。Georgina Michelena Aidin Martinez Graciela Cerutti Monica Coronel Antonio Bell Emilia Carrera Agustin Lopez-Murguia Roberto Portuondo Lazaro Mergarejo Frost M Steele 李宜海 2006广西轻工业2006,22,4:3
12Light Triggers the miRNA-Biogenetic Inconsistency for De-etiolated Seedling Survivability in Arabidopsis thaliana显示文摘The shift of dark-grown seedlings into light causes enormous transcriptome changes followed by a dramatic developmental transition.Here,we show that microRNA(miRNA)biogenesis also undergoes regulatory changes during de-etiolation.Etiolated seedlings maintain low levels of primary miRNAs(pri-miRNAs)and miRNA processing core proteins,such as Dicer-like 1,SERRATE,and HYPONASTIC LEAVES 1,whereas during de-etiolation both pri-miRNAs and the processing components accumulate to high levels.However,the levels of most miRNAs do not notably increase in response to light.To reconcile this inconsistency,we demonstrated that an unknown suppressor decreases miRNA-processing activity and light-induced SMALL RNA DEGRADING NUCLEASE 1 shortens the half-life of several miRNAs in de-etiolated seedlings.Taken together,these data suggest a novel mechanism,miRNA-biogenetic inconsistency,which accounts for the intricacy of miRNA biogenesis during de-etiolation.This mechanism is essential for the survival of de-etiolated seedlings after long-term skotomorphogenesis and their optimal adaptation to ever-changing light conditions.Suk Won Choi Moon Young Ryu Andras Viczian Hyun Ju Jung Gu Min Kim Agustin LArce Natalia PAchkar Pablo Manavella Ulla Dolde Stephan Wenke Attila Molnar Ferenc Nagy Seok Keun Cho Seong Wook Yang 2020Molecular Plant2020,13,3:3
13Recent advances in bird sperm morphometric analysis and its role in male gamete characterization and reproduction technologies显示文摘通过精子竞争的 Postcopulatory 性选择可以是影响许多繁殖特点的重要进化力量,包括精子 morphometrics。象污染物质,杀虫剂,和气候变化那样的环境因素可以影响不同精子特点,并且这样复制,在里面敏感的鸟种类。在帮助繁殖技术使用的许多处理精子的过程可以也影响精子房间的尺寸。精子房间结构(特别头) 的精确地测量的尺寸能因此被用作环境影响的指示物,在改进我们繁殖、进化的策略的理解,并且为优化帮助了繁殖技术(例如,精子 cryopreservation ) 为有鸟的使用。帮助计算机的精子 morphometry 分析(CASA-Morph ) 为估计精子 morphometry 提供一个精确、可靠的方法,减少与人的视觉评价联系的主观的问题。计算机化的系统从不同哺乳动物的种类与精液为使用被标准化了。然而,鸟的精子是丝状的,限制他们有如此的系统的分析,它被开发检查哺乳动物的精子房间的近似球形的负责人。帮助克服这,染色技术在估计计算机的轻显微镜的方法被过去常的标准化是优先级。现在的评论讨论这些点并且描述几野生、国内的鸟种的精子 morphometric 特征。Julian Santiago-Moreno Milagros Cristina Esteso Silvia Villaverde-Morcillo Adolfo Toledano-Diaz Cristina Castafio Rosario Velazquez Antonio Lopez-Sebastian Agustin Lopez Goya Javier Gimeno Martinez 2016Asian Journal of Andrology2016,18,6:3
14Non-invasive methods for liver fi brosis prediction in hemochromatosis:One step beyond显示文摘Advances in recent years in the understanding of, and the genetic diagnosis of hereditary hemochromatosis (HH) have changed the approach to iron overload he-reditary diseases. The ability to use a radiologic tool (MRI) that accurately provides liver iron concentration determination, and the presence of non-invasive sero-logic markers for fibrosis prediction (ser um ferritin, platelet count, transaminases, etc), have diminished the need for liver biopsy for diagnosis and prognosis of this disease. Consequently, the role of liv er biopsy in iron metabolism disorders is changing. Furthermore, the irruption of transient elastography to assess liver stiffness, and, more recently, the ability to determine liver f ibrosis by means of MRI elastography will change this role even more, with a potential drastic decline in hepatic biopsies in years to come. This review will provide a brief summary of the different non-invasive methods available nowadays for diagnosis and prognosis in HH, and point out potential new techniques that could come about in the next years for fibrosis prediction, thus avoiding the need for liver biopsy in a greater number of patients. It is possible that liver biopsy will remain useful for the diagnosis of associated diseases, where other non-invasive means are not po-ssible, or for those rare cases displaying discrepancies between radiological and biochemical markers.Agustin Castiella Eva Zapata José M Alústiza 2010World Journal of Hepatology2010,2,7:3
15Stable femtosecond X-rays with tunable polarization from a laser-driven accelerator显示文摘Technology based on high-peak-power lasers has the potential to provide compact and intense radiation sources for a wide range of innovative applications.In particular,electrons that are accelerated in the wakefield of an intense laser pulse oscillate around the propagation axis and emit X-rays.This betatron source,which essentially reproduces the principle of a synchrotron at the millimeter scale,provides bright radiation with femtosecond duration and high spatial coherence.However,despite its unique features,the usability of the betatron source has been constrained by its poor control and stability.In this article,we demonstrate the reliable production of X-ray beams with tunable polarization.Using ionization-induced injection in a gas mixture,the orbits of the relativistic electrons emitting the radiation are reproducible and controlled.We observe that both the signal and beam profile fluctuations are significantly reduced and that the beam pointing varies by less than a tenth of the beam divergence.The polarization ratio reaches 80%,and the polarization axis can easily be rotated.We anticipate a broad impact of the source,as its unprecedented performance opens the way for new applications.Andreas Döpp Benoit Mahieu Agustin Lifschitz Cedric Thaury Antoine Doche Emilien Guillaume Gabriele Grittani Olle Lundh Martin Hansson Julien Gautier Michaela Kozlova Jean Philippe Goddet Pascal Rousseau Amar Tafzi Victor Malka Antoine Rousse Sebastien Corde Kim Ta Phuoc 2017Light(Science & Applications)2017,6,1:2
16Synthesis, Structure, Adsorption Space and Magnetic Properties of Ni-oxalate Porous Molecular Magnet显示文摘Agustin Rios-Ramos Christymarie Rivera-Maldonado Geidy Ines Garcia-Acosta Cesar ManuelLozano-Paulino Pedro Manuel Fierro-Mercado Luis Fuentes-Cobas Rolando Marcos Roque-Malherbe 2012材料科学与工程(中英文A版)2012,2,3:2
17Explaining aggregate private saving behaviour: new evidence from a panel of OECD countries显示文摘Julian Ramajo Agustin Garcia Montserrat Ferre 2006Applied Financial Economics Letters2006,,5:2
18高k材料/金属栅电极迈向大规模量产显示文摘到了45纳米技术节点,高介电常数绝缘材料和金属栅电极将被用于制造逻辑电路器件。而采用高金属功函数和能隙工程电荷陷阱的闪存也能从这些项技术中获益。Reza Arghavani Gary Miner Melody Agustin 2008集成电路应用2008,25,1:2
19Engineering Improved Photosynthesis in the Era of Synthetic Biology显示文摘Much attention has been given to the enhancement of photosynthesis as a strategy for the optimization of crop productivity.As traditional plant breeding is most likely reaching a plateau,there is a timely need to accelerate improvements in photosynthetic efficiency by means of novel tools and biotechnological solutions.The emerging field of synthetic biology offers the potential for building completely novel pathways in predictable directions and,thus,addresses the global requirements for higher yields expected to occur in the 21st century.Here,we discuss recent advances and current challenges of engineering improved photosynthesis in the era of synthetic biology toward optimized utilization of solar energy and carbon sources to optimize the production of food,fiber,and fuel.Willian Batista-Silva Paula da Fonseca-Pereira Auxiliadora Oliveira Martins Agustin Zsogon Adriano Nunes-Nesi Wagner L.Araujo 2020Plant Communications2020,1,2:2
20氮素改变辣椒初级代谢和薄壁组织厚度调控比叶面积研究显示文摘比叶面积(SLA)是影响植物光截获和光利用效率的关键性状,常常影响植物的生长和产量。SLA是解释不同植物在不同环境下生长差异的一个关键性状。光照和氮素供应都是决定SLA的重要因素。为了更好地了解辐照度和氮素对辣椒(Capsicum chinense)SLA的影响,研究对两个中国辣椒商品种(Biquinho和Habanero)的初级代谢产物和形态特征进行了分析。两种基因型辣椒的SLA随着遮阴而增加,但随氮供应量的增加而下降;在氮素供应由缺乏到充足的范围内Habanero品种的SLA表现稳定。相关分析表明,高氮供应导致SLA降低是因为氨基酸、蛋白质和淀粉含量的调节,从而影响叶片密度。此外,在中度缺氮到充足供氮范围内,两种基因型辣椒的SLA表现出响应差异,Biquinho和Habanero分别在栅栏和海绵状薄壁组织上表现出差异。总之,结果表明,SLA对氮供应的反应是由某些代谢物含量和依赖于基因型的影响叶片厚度及密度的薄壁组织变化平衡调节的。Lucas de ávila Silva Rebeca P.Omena-Garcia Jorge A.Condori-Apfata Paulo Mafra de Almeida Costa Natália Machado Silva Fábio M.Da Matta Agustin Zsogon Wagner L.Araújo Edgard A.de Toledo Picoli Ronan Sulpice Adriano Nunes-Nesi 沈凌峰 吉雪花(译) 2021辣椒杂志2021,,3:2
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