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PubMed Journal Database | Journal of plant physiology RSS

07:47 EDT 24th March 2019 | BioPortfolio

The US National Library of Medicine and National Institutes of Health manage PubMed.gov which comprises of more than 29 million records, papers, reports for biomedical literature, including MEDLINE, life science and medical journals, articles, reviews, reports and  books.

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Showing PubMed Articles 1–25 of 440 from Journal of plant physiology

Role of apoplastic calcium during germination and initial stages of seedling establishment in Vigna radiata seeds.

Calcium (Ca) is implicated in the initial phase of seed germination and seedling establishment. It is stored complexed with phytic acid during seed development and released by phytase action during germination. We observed phytase activity 18 h post-imbibition (PI) in Vigna seeds, while radicle protrusion occurred approximately 12 h PI. Cotyledon protein extracts prepared 4, 8, 16 and 24 h PI, subjected to Ca immobilized metal affinity chromatography (Ca IMAC), revealed the presence of Ca binding prot...

'Candidatus Liberibacter asiaticus' peroxiredoxin (LasBCP) suppresses oxylipin-mediated defense signaling in citrus.

The Lasbcp (CLIBASIA_RS00445) 1-Cys peroxiredoxin gene is conserved among all 13 sequenced strains of Candidatus Liberibacter asiaticus, the causal agent of Huanglongbing or "citrus greening" disease. LasBCP was previously characterized as a secreted peroxiredoxin with substrate specificity for organic peroxides, and as a potential pathogenicity effector. Agrobacterium-mediated transient expression of LasBCP in citrus leaves provided significant protection against peroxidation of free and membrane-bound lip...

Spatio-temporal IAA gradient is determined by interactions with ET and governs flower abscission.

The abscission zone (AZ) is a specialized tissue that usually develops at the base of an organ and is highly sensitive to phytohormones, e.g., abscisic acid (ABA), ethylene (ET), and gibberellins (GAs). A current model of organ abscission assumes that the formation of an auxin gradient around the AZ area determines the time of shedding; however, that thesis is supported by studies that are primarily concerned with auxin transporters. To better understand the events underlying the progression of abscission, ...

Cloning and expression analysis of LoCCD8 during IAA-induced bulbils outgrowth in lily (Oriental Hybrid 'Sorbonne').

Aerial bulbils, which resemble tiny bulbs, develop from axillary buds and facilitate rapid propagation of Lilium. In most species of lily, bulbils are perpetually dormant and little is known about induction of these vegetative structures. Herein, we proposed that strigolactones (SLs) may regulate the induction of bulbils in Lilium. We tested this hypothesis by isolating and investigating the expression patterns of 2 copies of the carotenoid cleavage dioxygenase8 (CCD8) gene in lily-LoCCD8a and LoCCD8b-with ...

Ethylene mediates repression of anthocyanin accumulation in black rice pericarps in the absence of light.

The antioxidant properties of black rice are attributed to the high anthocyanin content in the pericarp. Light-dependent regulation of anthocyanin biosynthesis and the associated regulatory genes have been extensively studied in many plant species, including rice. Light is considered indispensable for anthocyanin accumulation in plants. Here, we report that anthocyanin biosynthesis and accumulation in the dark is negatively regulated by ethylene, as the ethylene biosynthesis inhibitor aminoethoxyvinylglycin...

Shoot chloride translocation as a determinant for NaCl tolerance in Vicia faba L.

Faba bean (Vicia faba L.) is sensitive to salinity. While toxic effects of sodium (Na) are well studied, toxicity aspects of chloride (Cl) and the underlying tolerance mechanisms to Cl are not well understood. For this reason, shoot Cl translocation and its effect as potential determinant for tolerance was tested. Diverse V. faba varieties were grown hydroponically and stressed with 100 mM NaCl until necrotic leaf spots appeared. At this point, biomass formation, oxidative damage of membranes as well as N...

The role of OsNLA1 in regulating arsenate uptake and tolerance in rice.

Arsenic (As) contamination in agricultural soil can cause phytotoxicity and lead to As accumulation in crops. Rice (Oryza sativa) feeds half of the world's population, but the molecular mechanism of As detoxification is not well understood in rice. In this study, the role of OsNLA1 in arsenate uptake and tolerance in rice was analyzed. OsNLA1 expression was induced in response to As(V) stress. The osnla1 mutant was more sensitive to As(V) stress than those of the wild type (WT). When exposed to As(V), mutat...

Composition of Mitochondrial Complex I during the Critical Node of Seed Aging in Oryza sativa.

Previous studies have documented mitochondrial dysfunction during the critical node (CN) of rice (Oryza sativa) seed aging, including a decrease in the capacity of NADH dependent O consumption. This raises the hypothesis that changes in the activity of NADH:ubiquinone oxidoreductase (complex I) may play a role in seed aging. The composition and activity of complex I was investigated at the CN of aged rice seeds. Using BN-PAGE and SWATH-MS 52 complex I subunits were identified, nineteen for the first time to...

Involvement of Medicago truncatula glutamate receptor-like channels in nitric oxide production under short-term water deficit stress.

Early stages of plant development are highly susceptible to environmental cues, and seedlings have to develop sophisticated mechanisms to sense and respond to abiotic stresses. We have previously identified that abscisic acid (ABA), nitric oxide (NO) and modulation of nitrogen metabolism are involved in adaptive responses in Medicago truncatula seedlings under water deficit stress. Here, we investigated whether glutamate receptor-like channels (GLRs) played a role in the developmental physiological processe...

Study of the physiological mechanism of delaying cucumber senescence by wheat intercropping pattern.

This paper investigates the physiological mechanism of the effect of delaying cucumber senescence on protein levels under the experimental model of monoculture and wheat intercropping. We analyzed cucumber roots for differential protein expression, and protein types were identified by core technology of proteomics. 45 differential proteins were identified as being differentially expressed between monoculture and intercropping of wheat, which were involved in carbohydrate metabolism, antioxidant and stress r...

Hydrogen peroxide burst triggers accumulation of jasmonates and salicylic acid inducing sesquiterpene biosynthesis in wounded Aquilaria sinesis.

Agarwood, a non-timber fragrant wood, is produced in wounded Aquilaria trees and widely used in perfume, incense, and medicine. Sesquiterpene is one of its main active compounds. It has been demonstrated that hydrogen peroxide (HO) plays a role in promoting agarwood sesquiterpene biosynthesis, but little is known about its signaling pathway. In this study, the pruning of actively growing saplings of A. sinensis resulted in an HO burst and the accumulation of jasmonic acid (JA), salicylic acid (SA), and ethy...

Gibberellins play dual roles in response to phosphate starvation of tomato seedlings, negatively in shoots but positively in roots.

Gibberellins (GAs), a group of plant hormones, and phosphate (Pi), a macronutrient, are essential for numerous aspects of plant growth and development. During Pi starvation, plants develop many adaptive strategies to cope. However, the detailed roles of GAs in Pi deficiency responses of plants are largely unclear. In the present work, we found that low Pi (LP) treatment caused many responses in tomato (Solanum lycopersicum), including anthocyanin accumulation, upregulation of genes encoding high-affinity Pi...

A naturally optimized mass transfer process: The stomatal transpiration of plant leaves.

Stomatal transpiration of leaves is a dominant pathway of plant physiological water loss. The leaf transpiration rate when stomata are fully open is commonly at the same level as the evaporation rate of a wet surface of the same area as that of the leaf area, although the cumulative area of the stomatal pores is typically less than 3% of the leaf area. To elucidate the highly efficient diffusion of the stomatal array from the perspective of mass transfer theory, stomatal distribution characteristics of vari...

Analysis of the molecular basis of fruit cracking susceptibility in Litchi chinensis cv. Baitangying by transcriptome and quantitative proteome profiling.

Fruit cracking is a serious problem in Litchi chinensis cv. Baitangying orchards, but few advances have been made in understanding the molecular basis of cracking susceptibility in 'Baitangying'. In this work, we conducted transcriptome and quantitative proteome analyses of the pericarps of three kinds of litchi: noncracking 'Feizixiao' (cracking-resistant cultivar, F), noncracking 'Baitangying' (B), and cracking 'Baitangying' (CB). A total of 101 genes and 14 proteins with the same regulatory changes were ...

Methyl jasmonate enhances salt tolerance of almond rootstocks by regulating endogenous phytohormones, antioxidant activity and gas-exchange.

The effects of methyl jasmonate (MeJA) foliar application (0, 0.025, 0.050 and 0.075 mM) on the growth and physiological responses of two almond rootstocks (GF677 and bitter almond) exposed to various concentrations of NaCl in irrigation water (0, 50, 100 and 150 mM) were evaluated. 60 days after salt stress exposure, the mitotic index of root apical meristem cells as well as shoot and root growth, activity of main antioxidant enzymes, gas exchange parameters and contents of cytokinins and ABA were dete...

Patellin protein family functions in plant development and stress response.

The plant patellin (PATL) proteins are yeast Sec14 protein (Sec14p)-like phosphatidylinositol transfer proteins (PITPs), which are widely distributed across the plant kingdom. The model plant Arabidopsis has six PATL members (designated as PATL1-PATL6). Accumulated evidence has indicated the involvement of Arabidopsis PATLs in various biological processes. This mini-review briefly summarizes our current knowledge on individual PATLs regarding their roles in plant development and stress tolerance regulation....

Dynamic changes in the starch-sugar interconversion within plant source and sink tissues promote a better abiotic stress response.

Starch is a significant store of sugars, and the starch-sugar interconversion in source and sink tissues plays a profound physiological role in all plants. In this review, we discuss how changes in starch metabolism can facilitate adaptive changes in source-sink carbon allocation for protection against environmental stresses. The stress-related roles of starch are described, and published mechanisms by which starch metabolism responds to short- or long-term water deficit, salinity, or extreme temperatures a...

Effects of elevated CO concentration on leaves and berries of black elder (Sambucus nigra) using UHPLC-ESI-QTOF-MS/MS and gas exchange measurements.

The effect of elevated CO concentration on leaves of black elder (Sambucus nigra) was investigated based on leaf gas exchange, chlorophyll content as well as on the analysis of the underlying metabolite profile of the fruits. The measurements were carried out once a month over a period of time of 4 months. The CO uptake rate, the transpiration rate and stomatal conductance were significantly higher in plants under ambient CO, in comparison to plants grown under elevated CO concentrations. On the other hand,...

Identification of microRNAs and their targets responding to low-potassium stress in two barley genotypes differing in low-K tolerance.

MicroRNAs (miRNAs) have diverse and crucial roles in plant growth and development, including in the response to abiotic stresses. Although plant responses to K deficiency are well documented at the physiological and transcriptional levels, the miRNA-mediated post-transcriptional pathways are still not clearly elucidated. In this study, high-throughput sequencing and degradome analysis were performed using two barley genotypes differing in low-K tolerance (XZ149, tolerant and ZD9, sensitive), to determine th...

Differential carbon allocation to nitrogen-rich patches in Poa annua precedes root proliferation but has no immediate benefit to N uptake.

Nutrients are heterogeneously distributed in the soil environment. Plants have evolved a variety of mechanisms to maximise their ability to compete for limited resources, with differential root growth considered among the more important mechanisms. Despite the significant costs of root growth, little data is available regarding carbon (C) allocation to roots growing in heterogeneous conditions. Here, we investigate the allocation of recently assimilated C in Poa annua plants growing in uniform or heterogene...

Root phenotypes of dwarf and "overgrowth" SLN1 barley mutants, and implications for hypoxic stress tolerance.

Gibberellins are central to the regulation of plant development and growth. Action of gibberellins involves the degradation of DELLA proteins, which are negative regulators of growth. In barley (Hordeum vulgare), certain mutations affecting genes involved in gibberellin synthesis or coding for the barley DELLA protein (Sln1) confer dwarfism. Recent studies have identified new alleles of Sln1 with the capacity to revert the dwarf phenotype back to the taller phenotypes. While the effect of these overgrowth a...

Homologous genes of epidermal patterning factor regulate stomatal development in rice.

Stomata are microscopic pores on the surface of leaves through which water as vapor passes to the atmosphere and CO uptake for the photosynthesis. The signaling peptides of the epidermal patterning factor (EPF) family regulate stomatal development and density in Arabidopsis. Several putative homologs of EPF/EPFL exist in rice genome. To understand their possible involvement in stomatal formation, in this study we generated a series of transgenic lines including reporter promoter fusions, down-regulation and...

The role of the cell walls in Ni binding by plant roots.

The role of the cell wall in short-term Ni uptake at different solution Ni levels was investigated in mung bean (Vigna radiata (L.) R. Wilczek) and wheat (Triticum aestivum L., cv. Inna). Both Ni-binding capacity of the CWs and roots are lower for wheat than for mung bean at all Ni levels in the solution. For both plants amounts of Ni associated with roots and root cell walls increased with Ni concentration. The contribution of CWs to Ni absorption by roots depends on Ni level in the medium and plant specie...

Energy saving and improvement of metabolism of cultured tobacco cells upon exposure to 2-D clinorotation.

Studies have confirmed that on the ground, the plant cells must expend energy to maintain positional homeostasis against gravity. Under microgravity conditions, such energy may be saved for other process such as biosynthesis of beneficial metabolites for growth. This hypothesis was examined on a cell line of tobacco (Nicotiana tabacum cv. Burley 21). The cells were continuously treated with 2-D clinostat for 1 week. Exposure to clinorotation conditions increased biomass and total protein. Total content of s...

The expression of the genes involved in redox metabolism and hydrogen peroxide balance is associated with the resistance of cowpea Vigna unguiculata (L.) Walp. to the hemibiotrophic fungus Colletotrichum gloeosporioides.

Correlations between the transcriptional responses of genes that encode superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and peroxiredoxin (Prx) enzymes and Colletotrichum gloeosporioides development in cowpea leaves were assessed. Each of these genes is involved in the redox metabolism and hydrogen peroxide balance. Although electron microscopy revealed that conidia adhered to and germinated on the leaf cuticle, the inoculated cowpea leaves did not show any characteristic anthracnose...


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