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Master of one trade:Arbutus unedo relies on plasticity to persist under habitats differing in water availability

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Journal of Plant Ecology 2017年第5期10卷 869-881页

作者： Xabier Santiso Rubén Retuerto Área de Ecología Facultad de BiologíaCampus VidaUniversidade de Santiago de Compostela15782 Santiago de CompostelaSpain

Aims the limited water supply in the Mediterranean Basin will be exacerbated in the immediate future as result of severe drought ***,the study of the intraspecific variability in functional traits of plant species is important,because such variability modulates species’***,we aimed to analyse the variability in plasticity of physiological and structural traits of Arbutus unedo *** response to water availability and to determine whether the levels of phenotypic plasticity varied in plants of different *** We kept two sets of plants under contrasted water regimes(high water and low water)and calculated a phenotypic plasticity index to determine the plastic response to water *** compared the response among kind of traits and *** also per-formed analysis of variance to assess the trait and provenance *** Findings We found that biomass and key physiological traits decrease under drought conditions,while the water use efficiency *** differed between groups of traits,being higher in structural and gas exchange parameters,but the provenance did not account for signifi-cant variation in *** has evolved a‘good saver’strat-egy,involving decreasing growth and water use-when this resource is unavailable-together with the dissipation of excess of radiation that it cannot *** homogeneous response between provenances may be the result of a canalization *** strategy,based on a high degree of plasticity,is a probable determining factor in the success of the species over its wide range of environmental conditions and will be critical to withstand the ongoing environmental changes.

关键词： adaptation canalization contrasted provenances drought global change phenotypic plasticity

Effects of "Candidatus Liberibacter solanacearum"(haplotype B)on Bactericera cockerelli fitness and vitellogenesis

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Insect Science 2020年第1期27卷 58-68页

作者： Angelica Albuquerque Tomilhero Frias Freddy Ibanez Azucena Mendoza William Mario de Carvalho Nunes Cecilia Tamborindeguy Department of Entomology Texas A&M University412 Heep CenterCollege StationTexasUSA DEM-depto.de Agronomia Nucleo de Pesquisa em Biotecnologia AplicadaMaringaBrazil

"Candidatus Liberibacter solanacearum"(Lso)are phloem-restricted and unculturable Gram-negative *** five haplotypes have been identified worldwide;but only haplotypes A and B are associated with the vector Bactericera cockerelli(Sulc.)in the *** studies showed that Lso-infection reduces *** reproductive output and that Lso haplotype B is more pathogenic than Lso haplotype *** understand the interaction of Lso haplotype B and ***,the fitness of Lso-free and Lso B-infected insects,and the expression of vitellogenin(5cKg7-like),a gene involved directly in the insect reproduction were *** differences in the number of eggs oviposited,and the total number of progeny nymphs and adults were found among crosses of insects with or without *** differences in sex proportions were found between Lso B-infected and Lso-free crosses:a higher proportion of Fi adult females were obtained from Lso B-infected mothers.A significant reduction of BcVgl-like was observed in crosses performed with Lso B-infected females compared to the Lso-free *** female cohorts of different age,a significant reduction of BcVgl-like expression was measured in 7-d-old Lso B-infected females(virgin and mated)compared with 7-d-old Lso-free females(virgin and mated),*** reduction of BcVgl-like transcript was associated with a lower number of developing oocytes observed in female5s reproductive ***,this study represents the first step to understand the interaction of Lso B with ***,highlighting the effect of Lso B infection on egg production,BcVgl-like expression,and oocyte development.

关键词： feminization insect-pathogen interaction oviposition psyllids reproduction vitellogenesis

CBFs at the Crossroads of Plant Hormone Signaling in Cold Stress Response

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Molecular Plant 2017年第4期10卷 542-544页

作者： Javier Barrero-Gil Julio Salinas Departamento de biología Medioambiental Centro de Investigaciones Biológicas-CSIC Ramiro de Maeztu 9 28040 Madrid Spain

Brassinosteroids （BRs） are steroid plant hormones with important roles in plant growth and development through the regulation of processes such as cell division and expansion. In addition to their role as growth promoters, BRs can also protect plants from a va- riety of abiotic stresses, including drought, salt, heat, and cold stress. Nevertheless, the molecular determinants underlying this protective effect remain largely uncharacterized.

关键词： CBFs Crossroads Plant Hormone Signaling

Molecular complexity of visual mapping: a challenge for regenerating therapy

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Neural Regeneration Research 2020年第3期15卷 382-389页

作者： Mara Medori Gonzalo Spelzini Gabriel Scicolone CONICET–Universidad de Buenos Aires Instituto de Biología Celular y Neurociencias“Prof.E.De Robertis”(IBCN)Ciudad Autónoma de Buenos AiresArgentina Universidad de Buenos Aires Facultad de MedicinaDepartamento de Biología CelularHistologíaEmbriología y GenéticaCiudad Autónoma de Buenos AiresArgentina

Investigating the cellular and molecular mechanisms involved in the development of topographically ordered connections in the central nervous system constitutes an important issue in neurobiology because these connections are the base of the central nervous system normal *** dominant model to study the development of topographic maps is the projection from the retinal ganglion cells to the optic tectum/*** expression pattern of Eph/ephrin system in opposing gradients both in the retina and the tectum,labels the local addresses on the target and gives specific sensitivities to growth cones according to their topographic origin in the *** rigid precision of normal retinotopic mapping has prompted the chemoaffinity hypothesis,positing axonal targeting to be based on fixed biochemical affinities between fibers and ***,several lines of evidence have shown that the mapping can adjust to experimentally modified targets with flexibility,demonstrating the robustness of the guidance *** we discuss the complex ways the Ephs and ephrins interact allowing to understand how the retinotectal mapping is a precise but also a flexible process.

关键词： axon growth axon guidance development Eph and ephrin mapping regeneration retinal ganglion cells retino-tectal system

Mitochondrial genotyping of cultured Piaractus brachypomus revealed low diversity and mutations in regions involved in metabolisms and proliferation

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Aquaculture and Fisheries 2023年第3期8卷 239-243页

作者： Alexis Felipe Rojas-Cruz Carlos Ciceri-Coronado Alejandro Reyes-Bermúdez Programa de biología Facultad de Ciencias B´asicasUniversidad de la AmazoniaFlorencia180001Colombia

In Amazonia,small-oriented family businesses or communities cultivate freshwater organisms as a source of *** effective management is fundamental for optimizing cultivated stocks,Amazonian aquaculture belittles the importance of genetic diversity,relying primarily on phenotypical characteristics during breeders’*** provide a“proof of concept”built on the premise that implementing modern technologies is crucial to optimizing fish stocks in rural Amazonian fish farms,we conducted a pilot study assessing genetic diversity on cultivated Piaractus brachypomus from Caquet´a,*** used mitochondrial control region(CR)sequences to evaluate *** data revealed low genetic diversity and suggested that most sampled individuals probably originated from a single maternal *** diversification resulted from discrete point mutations not associated with geographical *** accumulate in non-conserved CR regions,yet the most divergent haplotypes display mutations in conserved CR sequences with roles in mitochondrial metabolisms and ***,our results indicate a need in the local industry to design breeding strategies to enhance diversity to avoid deleterious effects caused by inbreeding and domestication.

关键词： Mitochondrial control region Amazonian fish farming Genetic diversity Freshwater

Daily expression of sodium-dependent glucose cotransporter-1protein in jejunum during rat ontogeny

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Animal Nutrition 2019年第3期5卷 290-296页

作者： Juan I.Baston Fabricio D.Cid Enrique Caviedes-Vidal Juan G.Chediack Laboratorio de Fisiopatología Endometrial Instituto de Biología y Medicina Experimental(IByME)CONICETCiudad Autoonoma de Buenos AiresC1428ADNArgentina Laboratorio de biología Integrativa“Prof.E.Caviedes Codelia” Facultad de QuímicaBioquímica y FarmaciaUniversidad Nacional de San LuisSan LuisD5700HHWArgentina Instituto Multidisciplinario de Investigaciones en biología-San Luis(IMIBIO-SL CCT-SL)CONICETSan Luis D5700HHWArgentina

It is widely known that intestinal capacities such as the enzymatic hydrolysis of carbohydrates,lipids and proteins,and the subsequent absorption of the hydrolyzed *** evolutionary matched to dietary loads and feeding *** this study,we demonstrate that the protein expression of apically located sodium-dependent glucose cotransporter-1(SGLT-1)throughout rat ontogeny is daily adjusted to afford glucose uptake when the load of this metabolically essential monosaccharide in the intestinal lumen is *** jejunal expression of SGLT-1 protein in 14 one-day-old suckling pups was found to increase at dark and early light phase(Pbiological significance of a well-established molecular capacity to deal with the crucial increase of glucose load in the diet during the weaning process.

关键词： Intestinal SGLT-1 Protein expression Daily rhythms Ontogeny Rat

Non-steroidal anti-inflammatory drugs(NSAIDs) and neuroprotection in the elderly a view from the mitochondria

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Neural Regeneration Research 2015年第9期10卷 1371-1372页

作者： María Calvo-Rodríguez Lucía Nú?ez Carlos Villalobos Instituto de biologíay Genética Molecular (IBGM) Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Valladolid

The most important risk factor for stroke and neurodegeneration is aging. In fact, survival after stroke diminishes largely with aging. In fact, recovery after brain artery occlusion is dramatically worsened by aging, even normal aging is associated with neuron damage and cognitive decline. Mechanisms involved in aging-related, cognitive decline and susceptibility to neuron damage in stroke and neurode- generation are largely unknown. One of the most important mech- anisms contributing to neural dysfunction and death is excitotox- icity. This process is based on the fact that the excessive glutamate receptor stimulation may lead to neuronal damage. This overstim- ulation may be due to increased concentration of glutamate, or the prolonged activation of receptors.

关键词： NSAIDs Non-steroidal anti-inflammatory drugs and neuroprotection in the elderly a view from the mitochondria view

Senecio bonariensis Hook.&*** arsenic phytoextractor from water in laboratory and field trials

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Emerging Contaminants 2019年第1期5卷 15-22页

作者： Vanesa Perez Cuadra Viviana Cambi Martín Esposito María Gabriela Sica MagalíVerolo Amira Siniscalchi Elisa Rosalia Parodi depto.biología Bioquímica y Farmacia.Universidad Nacional del Sur(UNS)San Juan 670C.P.8000Bahía BlancaProv.Buenos AiresArgentina CCT BB-INBIOSUR UNS-CONICET San Juan 671C.P.8000Bahía BlancaProv.Buenos AiresArgentina Departamento de Agronomía(UNS) San Andres 800C.P.8000Bahía BlancaProv.Buenos AiresArgentina CCT BB-PLAPIQUI-UNS-CONICET Camino La Carrindanga km 7C.P.8000Bahía BlancaProv.Buenos AiresArgentina CCT BB-IADO-UNS-CONICET Camino La Carrindanga km 7C.P.8000Bahía BlancaProv.Buenos AiresArgentina

The use of plant species to cleanse groundwater with excessive concentrations of arsenic(As)derived from contact with weathered materials has become a valuable option to treat *** aim of this work was to analyze the bioaccumulation capacity of As of Senecio bonariensis(Asteraceae)through controlled laboratory tests and uncontrolled trials in the field in order to generate a low cost method applicable in rural areas that do not have systems of water *** collected from the natural environment were arranged in hydroponic crops under controlled and uncontrolled conditions,in the first case with increasing concentrations of As for 45 days,and in the second,with a constant concentration of As for a period in a range between 45 and 90 *** plants were processed and dried for the measurement of *** both tests,in all the samples there was a noticeable accumulation of As,generally greater in roots than in *** controlled conditions the plants accumulated more As in relation to greater concentration of this element in the *** all the trials a high bioaccumulation of As was found,which turns the plant into a *** to the ability of *** to accumulate As,and even more because of the great biomass produced by this species,it becomes an excellent one to be used for the remediation of arsenical waters.

关键词： Senecio bonariensis Phytoremediation Arsenic Underground water

The Woodcock＇s head： Resolving a morphological oddity using geometric morphometrics

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Zoological Systematics 2017年第1期42卷 102-107页

作者： jesus marugán-lobón unidad de paleontología dpto.biologíauniversidad autonóma de madridSpain

The scope of shape analysis based on geometric morphometrics has evolved into underscoring complex patterns of multidimensional shape change with multivariate statistical modelling （e.g., allometry, morphological integration, etc.）. Such breakthrough was made possible because the method relies on a consistent comparative reference system to compare shapes, the latter which is computed using the Cartesian coordinates of homologous landmarks. It has been shown elsewhere that traditional comparative reference systems based on anatomy, and oriented in stereotyped postures, such as the Frankfurt plane at rest, the Lateral Semicircular Canal when the animal is in alert, or the cranial floor when the animal is flying, are all inconsistent for anatomical comparisons. They vary too much and unpredictably across species. An extraordinary example of the problems that can arise in descriptive and comparative anatomy when using such reference systems is the traditional interpretation of the head of the Woodcock. Anywhere in literature it is written that the eyes of this gamebird are oriented backwards to protect itself from predators. Here, using geometric morphometrics it is demonstrated that the woodcock＇s skull is highly transformed, yet following a normal trend among birds. In turn, using GM it is demonstrated that the collective wisdom about this oddity is simply the result of interpreting the anatomy of its skull using unreliable reference systems.

关键词： Geometric morphometrics reference systems craniofacial skull Woodcock.