22,197 results match your criteria plant vascular


HASTY, the Arabidopsis EXPORTIN5 ortholog, regulates cell-to-cell and vascular microRNA movement.

EMBO J 2021 Jun 21:e107455. Epub 2021 Jun 21.

Department of Biology, ETH Zürich, Zürich, Switzerland.

Plant microRNAs (miRNAs) guide cytosolic post-transcriptional gene silencing of sequence-complementary transcripts within the producing cells, as well as in distant cells and tissues. Here, we used an artificial miRNA-based system (amiRSUL) in Arabidopsis thaliana to explore the still elusive mechanisms of inter-cellular miRNA movement via forward genetics. This screen identified many mutant alleles of HASTY (HST), the ortholog of mammalian EXPORTIN5 (XPO5) with a recently reported role in miRNA biogenesis in Arabidopsis. Read More

View Article and Full-Text PDF

How Do Trees Grow in Girth? Controversy on the Role of Cellular Events in the Vascular Cambium.

Acta Biotheor 2021 Jun 21. Epub 2021 Jun 21.

Department of Botany, Hamdard University, Tughlaqabad, New Delhi, 110 062, India.

Radial growth has long been a subject of interest in tree biology research. Recent studies have brought a significant change in the understanding of some basic processes characteristic to the vascular cambium, a meristem that produces secondary vascular tissues (phloem and xylem) in woody plants. A new hypothesis regarding the mechanism of intrusive growth of the cambial initials, which has been ratified by studies of the arrangement of cambial cells, negates the influence of this apical cell growth on the expansion of the cambial circumference. Read More

View Article and Full-Text PDF

The Effect of Temperature on Disease Severity and Growth of f. sp. Races 2 and 4 in Celery.

Phytopathology 2021 Jun 21. Epub 2021 Jun 21.

University of California Davis, 8789, Dept. of Plant Pathology, Hutchison Hall, Davis, California, United States, 95616-5270;

f. sp. () race 4, which is in species complex (FOSC) Clade 2, causes a new Fusarium wilt of celery. Read More

View Article and Full-Text PDF

Aliphatic hydrocarbons in urban runoff sediments: a case study from the megacity of Tehran, Iran.

J Environ Health Sci Eng 2021 Jun 12;19(1):205-216. Epub 2021 Jan 12.

Environmental Sciences Research Institute, Shahid Beheshti University, Tehran, Iran.

Urban runoff is known as an important contributor to diffuse a wide range of pollutants to receiving environments. Hydrocarbons are common contaminants in runoff mainly transported coupled to suspended particles and sediments. The aim of the study was to investigate the distribution and sources of Aliphatics in the sediments of Tehran's runoff drainage network. Read More

View Article and Full-Text PDF

Cytotoxic activities of L. extracts against 2D and 3D cancer cell models.

Cytotechnology 2021 Jun 1;73(3):373-389. Epub 2021 Apr 1.

Institute of Oncology and Radiology of Serbia, Pasterova 14, Belgrade, Serbia.

Six extracts were obtained from plant species L., collected at Samsun in Turkey. The aim of this study was to examine the mechanisms of the anticancer activity of these extracts. Read More

View Article and Full-Text PDF

The jasmonoyl-isoleucine receptor CORONATINE INSENSITIVE1 suppresses defence gene expression in Arabidopsis roots independently of its ligand.

Plant J 2021 Jun 18. Epub 2021 Jun 18.

Department of Plant Molecular Biology and Physiology, Albrecht-von-Haller Institute for Plant Sciences, University of Göttingen, Julia-Lermontowa-Weg 3, 37077, Göttingen, Germany.

The F-box protein CORONANTINE INSENSITIVE1 (COI1) serves as the receptor for the plant hormone jasmonoyl-isoleucine (JA-Ile). COI1, its co-receptors of the JASMONATE ZIM-domain (JAZ) protein family, and JA-Ile form a functional unit that regulates growth or defense in response to various stress cues. Strikingly, COI1, but not JA-Ile, is required for susceptibility of Arabidopsis thaliana towards the soil-borne vascular pathogen Verticillium longisporum. Read More

View Article and Full-Text PDF

24(R, S)-Saringosterol - From artefact to a biological medical agent.

J Steroid Biochem Mol Biol 2021 Jun 16;212:105942. Epub 2021 Jun 16.

Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Venusberg-Campus 1, D-53127, Bonn, Germany. Electronic address:

Enhancing the cholesterol turnover in the brain via activation of liver x receptors can restore memory in a mouse model for Alzheimer's disease. The edible Asian brown alga Sargassum fusiforme (Hijiki) contains high amounts of oxysterols such as (3β, 24ξ)-stigmasta-5, 28-dien-3, 24-diol (24[R, S]-saringosterol) that are a potent liver x receptor agonists. We aimed to find native European seaweed species with contents of 24(R, S)-saringosterol that are comparable to those found in Sargassum fusiforme. Read More

View Article and Full-Text PDF

Loss of zebrafish atp6v1e1b, encoding a subunit of vacuolar ATPase, recapitulates human ARCL type 2C syndrome and identifies multiple pathobiological signatures.

PLoS Genet 2021 Jun 18;17(6):e1009603. Epub 2021 Jun 18.

Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.

The inability to maintain a strictly regulated endo(lyso)somal acidic pH through the proton-pumping action of the vacuolar-ATPases (v-ATPases) has been associated with various human diseases including heritable connective tissue disorders. Autosomal recessive (AR) cutis laxa (CL) type 2C syndrome is associated with genetic defects in the ATP6V1E1 gene and is characterized by skin wrinkles or loose redundant skin folds with pleiotropic systemic manifestations. The underlying pathological mechanisms leading to the clinical presentations remain largely unknown. Read More

View Article and Full-Text PDF

Disturbance interval modulates the starting point for vegetation succession.

Ecology 2021 Jun 18:e03439. Epub 2021 Jun 18.

Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden.

Increased frequency and new types of disturbances due to global change calls for deepened insights into possible alterations of successional pathways. Despite current interest in disturbance interactions there is a striking lack of studies focusing on the implication of decreasing times between disturbances. We surveyed forest-floor vegetation (vascular plants and bryophytes) in a Pinus sylvestris-dominated, even-aged production forest landscape, unique due to presence of stands under a precisely dated disturbance interval gradient, ranging 0-123 yr between clearcutting and a subsequent mega-fire. Read More

View Article and Full-Text PDF

Ex situ phytoremediation trial of Sardinian mine waste using a pioneer plant species.

Environ Sci Pollut Res Int 2021 Jun 18. Epub 2021 Jun 18.

Department of Life and Environmental Sciences, Centre for Biodiversity Conservation (CCB), University of Cagliari, Viale Sant'Ignazio da Laconi 11-13, 09123, Cagliari, Italy.

The mitigation of metals contamination is currently a crucial issue for the reclamation of mine sites. Indeed, mine wastes are often disposed in open dumps and consequently pollutants are subjected to dispersion in the surrounding areas. In this study, the potential use of Helichrysum microphyllum subsp. Read More

View Article and Full-Text PDF

Revisiting the anatomy of the monocot cambium, a novel meristem.

Planta 2021 Jun 17;254(1). Epub 2021 Jun 17.

Uruwhenua Botanicals, 51 Falconer Rd, Pohara RD 1, Takaka, New Zealand.

Main Conclusion: The monocot cambium is semi-storied, and its cells do not undergo rearrangement. The monocot cambium is a lateral meristem responsible for secondary growth in some monocotyledons of Asparagales. It is an unusual meristem, not homologous with the vascular cambia of gymnosperms and non-monocotyledonous angiosperms. Read More

View Article and Full-Text PDF

Phytochemicals as Potential Epidrugs in Type 2 Diabetes Mellitus.

Front Endocrinol (Lausanne) 2021 1;12:656978. Epub 2021 Jun 1.

Department of Nutrition and Dietetics, Faculty of Pharmacy, University of Concepción, Concepción, Chile.

Type 2 diabetes Mellitus (T2DM) prevalence has significantly increased worldwide in recent years due to population age, obesity, and modern sedentary lifestyles. The projections estimate that 439 million people will be diabetic in 2030. T2DM is characterized by an impaired β-pancreatic cell function and insulin secretion, hyperglycemia and insulin resistance, and recently the epigenetic regulation of β-pancreatic cells differentiation has been underlined as being involved. Read More

View Article and Full-Text PDF

Expression of a maize SOC1 gene enhances soybean yield potential through modulating plant growth and flowering.

Sci Rep 2021 Jun 17;11(1):12758. Epub 2021 Jun 17.

Plant Biotechnology Resource and Outreach Center, Department of Horticulture, Michigan State University, East Lansing, MI, 48824, USA.

Yield enhancement is a top priority for soybean (Glycine max Merr.) breeding. SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1) is a major integrator in flowering pathway, and it is anticipated to be capable of regulating soybean reproductive stages through its interactions with other MADS-box genes. Read More

View Article and Full-Text PDF

Arabidopsis vascular complexity and connectivity controls PIN-FORMED1 dynamics and lateral vein patterning during embryogenesis.

Development 2021 Jun 17. Epub 2021 Jun 17.

Department of Botany, University of Wisconsin-Madison, Madison, WI 53706, USA.

Arabidopsis VASCULATURE COMPLEXITY AND CONNECTIVITY (VCC) is a plant-specific transmembrane protein that controls the development of veins in cotyledons. Here we show that the expression and localization of the auxin efflux carrier PIN-FORMED1 (PIN1) is altered in vcc developing cotyledons and that overexpression of PIN1-GFP partially rescues vascular defects of vcc in a dosage-dependent manner. Genetic analyses suggest that VCC and PINOID (PID), a kinase that regulates PIN1 polarity, are both required for PIN1-mediated control of vasculature development. Read More

View Article and Full-Text PDF

Deciphering OPDA Signaling Components in the Momilactone-Producing Moss .

Front Plant Sci 2021 31;12:688565. Epub 2021 May 31.

Agro-Biotechnology Research Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.

Jasmonic acid (JA) and its biologically active form jasmonoyl-L-isoleucine (JA-Ile) regulate defense responses to various environmental stresses and developmental processes in plants. JA and JA-Ile are synthesized from α-linolenic acids derived from membrane lipids 12-oxo-phytodienoic acid (OPDA). In the presence of JA-Ile, the COI1 receptor physically interacts with JAZ repressors, leading to their degradation, resulting in the transcription of JA-responsive genes by MYC transcription factors. Read More

View Article and Full-Text PDF

Wound Healing Activity of Fixed Oil Formulated in a Self-Nanoemulsifying Formulation.

Int J Nanomedicine 2021 9;16:3889-3905. Epub 2021 Jun 9.

Department of Pharmacology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.

Introduction: Delayed wound healing represents a common health hazard. Traditional herbal products have been often utilized to promote wound contraction. The current study aimed at assessing the wound healing activity of seed oil (OFI) and its self-nanoemulsifying drug delivery system (OFI-SNEDDS) formula in a rat model of full-thickness skin excision. Read More

View Article and Full-Text PDF

Tumor microenvironment and radioresistance.

Exp Mol Med 2021 Jun 16. Epub 2021 Jun 16.

Laboratory of Cancer Cell Biology, Graduate School of Biostudies, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan.

Metastasis is not the result of a random event, as cancer cells can sustain and proliferate actively only in a suitable tissue microenvironment and then form metastases. Since Dr. Stephen Paget in the United Kingdom proposed the seed and soil hypothesis of cancer metastasis based on the analogy that plant seeds germinate and grow only in appropriate soil, considerable attention has focused on both extracellular environmental factors that affect the growth of cancer cells and the tissue structure that influences the microenvironment. Read More

View Article and Full-Text PDF

Environmental DNA reveals arboreal cityscapes at the Ancient Maya Center of Tikal.

Sci Rep 2021 Jun 16;11(1):12725. Epub 2021 Jun 16.

Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati, Cincinnati, OH, 45267, USA.

Tikal, a major city of the ancient Maya world, has been the focus of archaeological research for over a century, yet the interactions between the Maya and the surrounding Neotropical forests remain largely enigmatic. This study aimed to help fill that void by using a powerful new technology, environmental DNA analysis, that enabled us to characterize the site core vegetation growing in association with the artificial reservoirs that provided the city water supply. Because the area has no permanent water sources, such as lakes or rivers, these reservoirs were key to the survival of the city, especially during the population expansion of the Classic period (250-850 CE). Read More

View Article and Full-Text PDF

MdFRK2-mediated sugar metabolism accelerates cellulose accumulation in apple and poplar.

Biotechnol Biofuels 2021 Jun 15;14(1):137. Epub 2021 Jun 15.

State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.

Background: Cellulose is not only a common component in vascular plants, but also has great economic benefits for paper, wood, and industrial products. In addition, its biosynthesis is highly regulated by carbohydrate metabolism and allocation in plant. MdFRK2, which encodes a key fructokinase (FRK) in apple, showed especially high affinity to fructose and regulated carbohydrate metabolism. Read More

View Article and Full-Text PDF

Cytokinins initiate secondary growth in the Arabidopsis root through a set of LBD genes.

Curr Biol 2021 Jun 8. Epub 2021 Jun 8.

Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki 00014, Finland; Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki 00014, Finland. Electronic address:

During primary growth, plant tissues increase their length, and as these tissues mature, they initiate secondary growth to increase thickness. It is not known what activates this transition to secondary growth. Cytokinins are key plant hormones regulating vascular development during both primary and secondary growth. Read More

View Article and Full-Text PDF

A global database of plant services for humankind.

PLoS One 2021 15;16(6):e0253069. Epub 2021 Jun 15.

Wadham College, University of Oxford, Oxford, United Kingdom.

Humanity faces the challenge of conserving the attributes of biodiversity that may be essential to secure human wellbeing. Among all the organisms that are beneficial to humans, plants stand out as the most important providers of natural resources. Therefore, identifying plant uses is critical to preserve the beneficial potential of biodiversity and to promote basic and applied research on the relationship between plants and humans. Read More

View Article and Full-Text PDF

Biogeographic regionalization by spatial and environmental components: Numerical proposal.

PLoS One 2021 15;16(6):e0253152. Epub 2021 Jun 15.

Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico.

Regionalization through the analysis of species groups offers important advantages in conservation biology, compared to the single taxon approach in areas of high species richness. We use a systematic framework for biogeographic regionalization at a regional scale based on species turnover and environmental drivers (climate variables and soil properties) mainly of herbaceous plant species richness. To identify phytogeographic regions in the Balsas Depression (BD), we use Asteraceae species, a family widely distributed in Seasonally Dry Tropical Forest (SDTF) and the most diverse of the vascular plants in Mexico. Read More

View Article and Full-Text PDF

Potential benefits of phytochemicals for abdominal aortic aneurysm.

Curr Med Chem 2021 Jun 14. Epub 2021 Jun 14.

Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.

Background: Abdominal aortic aneurysms (AAAs) is an important cause of death in older adults due to aortic rupture. There are currently no effective medical therapies for AAA, with surgery being the only acceptable treatment. There is frequently an extended period between AAA diagnosis and treatment by corrective surgery, during which an effective drug therapy could prevent or delay the need for AAA repair. Read More

View Article and Full-Text PDF

Age, Wound Size, and Position of Injury - Dependent Vascular Regeneration Assay in Growing Leaves.

Bio Protoc 2021 May 5;11(9):e4010. Epub 2021 May 5.

School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala 695551, India.

Recurring damage to the aerial organs of plants necessitates their prompt repair, particularly their vasculature. While vascular regeneration assays for aerial plant parts such as the stem and inflorescence stalk are well established, those for leaf vasculature remain unexplored. Recently, we established a new vascular regeneration assay in growing leaves and discovered the underlying molecular mechanism. Read More

View Article and Full-Text PDF

Aux/IAA and ARF Gene Families in : Identification, Evolution, and Dynamic Transcriptome Profiling During the Plant Growth Process.

Front Plant Sci 2021 26;12:666310. Epub 2021 May 26.

Key Laboratory of Tree Genetics and Biotechnology of Educational Department of China, College of Forestry, Nanjing Forestry University, Nanjing, China.

The phytohormone auxin plays a pivotal role in the regulation of plant growth and development, including vascular differentiation and tree growth. The auxin/indole-3-acetic acid (Aux/IAA) and auxin response transcription factor (ARF) genes are key components of plant auxin signaling. To gain more insight into the regulation and functional features of Aux/IAA and ARF genes during these processes, we identified 38 AUX/IAA and 34 ARF genes in the genome of and characterized their gene structures, conserved domains, and encoded amino acid compositions. Read More

View Article and Full-Text PDF

Circulating Plasma miRNA and Clinical/Hemodynamic Characteristics Provide Additional Predictive Information About Acute Pulmonary Thromboembolism, Chronic Thromboembolic Pulmonary Hypertension and Idiopathic Pulmonary Hypertension.

Front Pharmacol 2021 28;12:648769. Epub 2021 May 28.

Department of Pathology, Laboratory of Histomorphometry and Lung Genomics, Faculty of Medicine, University of São Paulo, São Paulo, Brazil.

Idiopathic pulmonary artery hypertension (IPAH), chronic thromboembolic pulmonary hypertension (CTEPH), and acute pulmonary embolism (APTE) are life-threatening cardiopulmonary diseases without specific surgical or medical treatment. Although APTE, CTEPH and IPAH are different pulmonary vascular diseases in terms of clinical presentation, prevalence, pathophysiology and prognosis, the identification of their circulating microRNA (miRNAs) might help in recognizing differences in their outcome evolution and clinical forms. The aim of this study was to describe the APTE, CTEPH, and IPAH-associated miRNAs and to predict their target genes. Read More

View Article and Full-Text PDF

Mediterranean Diet and cardio-vascular health: an historical perspective.

Authors:
Jacques Delarue

Br J Nutr 2021 Jun 14:1-43. Epub 2021 Jun 14.

Professor, Department of Nutritional Sciences and Laboratory of Human Nutrition, University Hospital/Faculty of Medicine/University of Brest, France.

The first investigation of dietary intake in the Mediterranean region was undertaken at the initiative of the government of Greece in 1948. Plant foods (cereals, pulses, nuts, potatoes, vegetables and fruits) accounted for 61% of total energy intake (TEI), animal foods (meat, eggs, fish, and dairy products) for 7% of TEI, and olive oil was the main oil used. In 1950s, Ancel Keys undertook studies in USA, Italy, Spain, England, Japan, Australia, Canada leading him to hypothesize that a link could exist between diet, plasma cholesterol and coronary heart disease (CHD). Read More

View Article and Full-Text PDF

Antiangiogenic and antitumor potential of berbamine, a natural CaMKIIγ inhibitor, against glioblastoma.

Biochem Biophys Res Commun 2021 Jun 10;566:129-134. Epub 2021 Jun 10.

Department of Pharmaceutical Engineering and Biotechnology, Sun Moon University, Asan, South Chungcheong, 31460, Republic of Korea. Electronic address:

Glioblastoma (GBM) is one of the most malignant brain tumors and requires the formation of new blood vessels, called angiogenesis, for its growth and metastasis. Several proangiogenic factors, including vascular endothelial growth factor (VEGF) and brain-derived neurotrophic factor (BDNF), stimulate GBM angiogenesis. Accordingly, blocking the angiogenesis induced by angiogenic factors represents a promising modality for the treatment of GBM. Read More

View Article and Full-Text PDF

Ecophysiological differentiation between life stages in filmy ferns (Hymenophyllaceae).

J Plant Res 2021 Jun 12. Epub 2021 Jun 12.

Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, 02138, USA.

Desiccation tolerance was a key trait that allowed plants to colonize land. However, little is known about the transition from desiccation tolerant non-vascular plants to desiccation sensitive vascular ones. Filmy ferns (Hymenophyllaceae) represent a useful system to investigate how water-stress strategies differ between non-vascular and vascular stages within a single organism because they have vascularized sporophytes and nonvascular gametophytes that are each capable of varying degrees of desiccation tolerance. Read More

View Article and Full-Text PDF

Host age and surrounding vegetation affect the community and colonisation rates of arbuscular mycorrhizal fungi in a temperate grassland.

New Phytol 2021 Jun 11. Epub 2021 Jun 11.

Faculty of Science, University of South Bohemia, 1760, 370 05.

Arbuscular mycorrhizal fungi (AMF) are important symbionts for the majority of terrestrial vascular plants, yet the drivers of the compositional variation in AMF communities need to be better understood. What effects does the ontogenetic stage of host plants have and do these effects differ between plant functional groups? Are the AMF communities modified by the properties of surrounding vegetation, such as the proportion of different functional groups or non-mycorrhizal plants? We addressed these questions in a temperate grassland and studied AMF communities using next-generation sequencing and light microscopy, evaluating their composition, taxonomic, phylogenetic and functional diversity, functional traits, and root colonisation levels. We found important differences of AMF communities and their diversity between seedlings and adults, larger than the differences among host species or between functional groups. Read More

View Article and Full-Text PDF