Abstract:
:Cadmium (Cd) is a non-essential trace element and its environmental concentrations are approaching toxic levels, especially in some agricultural soils. Understanding how and where Cd is stored in plants is important for ensuring food safety. In this study, we examined two plant species that differ in the distribution of Cd among roots and leaves. Lettuce and barley were grown in nutrient solution under two conditions: chronic (4 weeks) exposure to a low, environmentally relevant concentration (1.0 μM) of Cd and acute (1 h) exposure to a high concentration (5.0 mM) of Cd. Seedlings grown in solution containing 1.0 μM CdCl₂ did not show symptoms of toxicity and, at this concentration, 77% of the total Cd was translocated to leaves of lettuce, whereas only 24% of the total Cd was translocated to barley leaves. We tested the hypothesis that differential accumulation of Cd in roots and leaves is related to differential concentrations of phytochelatins (PCs), and its precursor peptides. The amounts of PCs and their precursor peptides in the roots and shoots were measured using HPLC. Each of PC₂₋₄ was synthesized in the barley root upon chronic exposure to Cd and did not increase further upon acute exposure. In the case of lettuce, no PCs were detected in the root given either Cd treatment. The high amounts of PCs produced in barley root could have contributed to preferential retention of Cd in barley roots.
journal_name
J Plant Physioljournal_title
Journal of plant physiologyauthors
Akhter F,McGarvey B,Macfie SMdoi
10.1016/j.jplph.2012.07.011subject
Has Abstractpub_date
2012-12-15 00:00:00pages
1821-9issue
18eissn
0176-1617issn
1618-1328pii
S0176-1617(12)00319-7journal_volume
169pub_type
杂志文章abstract::Fusarium oxysporum f. sp. melonis is a highly specialized fungus that attacks the root system of melon (Cucumis melo L.). In this work the presence of a class III chitinase was examined by immunological techniques in the root and stem base of a susceptible (cv. Galia) and a resistant (cv. Bredor) melon during the infe...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2005.02.004
更新日期:2006-01-01 00:00:00
abstract::The effect of excess copper on the expression of soluble proteins in 10-day old Phaseolus vulgaris seedlings was studied with two-dimensional electrophoresis and mass spectrometry, to find sensitive biochemical markers of exposure. Despite major differences in root Cu contents, both 15 and 50 microM Cu treatments resu...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2004.07.018
更新日期:2005-04-01 00:00:00
abstract::Plant tissue growth can be regulated and controlled via culture media composition. A number of different laborious and time-consuming approaches have been used to attempt development of optimized media for a wide range of species and applications. However, plant tissue culture is a very complex task, and the identific...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2011.04.008
更新日期:2011-10-15 00:00:00
abstract::Bienertia sinuspersici performs single cell C4 photosynthesis without Kranz anatomy. Peripheral and central cytoplasmic compartments in a single chlorenchyma cell act as mesophyll cells and bundle sheath cells. Development of this specialized mechanism is gradual during plant development. Young leaves perform C3 photo...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2017.10.006
更新日期:2018-01-01 00:00:00
abstract::Using glass microelectrodes we studied (in spinach, a long-day plant) the characteristics of the intracellular potential of mesophyll cells as well as its response towards light, in particular during the transfer of the plant to an inductive photoperiod (transfer from short day to continuous photoperiod). When 20 minu...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/S0176-1617(85)80207-8
更新日期:1985-04-01 00:00:00
abstract::Citrus canker caused by Xanthomonas axonopodis pv. citri (Xac) is a devastating bacterial disease threatening the citrus industry. Salicylic acid (SA) plays a key role in plant defense response to biotic stress, but information is scarce concerning the application of SA to enhancing Xac resistance. In the present rese...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2012.03.018
更新日期:2012-08-15 00:00:00
abstract::Saliva miltiorrhiza ethylene response factor (SmERF), predicted to be expressed genome-wide, is the potential regulator of tanshinone biosynthesis. However, few studies have investigated its transcriptional regulation pathways in tanshinone biosynthesis. Here, we report an ethylene response factor (SmERF8), which was ...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2019.153006
更新日期:2020-01-01 00:00:00
abstract::1-Deoxy-d-xylulose 5-phosphate reductoisomerase (DXR, EC: 1.1.1.267) is the second enzyme in the 2C-methyl-d-erythritol 4-phosphate (MEP) pathway, one of the two pathways in plants that can produce isoprenoids. The MEP pathway is the source of isoprene emitted from leaves, but rubber production is believed to result p...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2007.06.014
更新日期:2008-06-16 00:00:00
abstract::To elucidate influences on the tocopherol biosynthesis in cyanobacteria, wild type and mutant cells of a putative methyltransferase in tocopherol and plastoquinone biosynthesis of Synechocystis sp. PCC 6803 were grown under different conditions. The vitamin E content of cells grown under different light regimes, photo...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2005.04.006
更新日期:2005-07-01 00:00:00
abstract::Thymus vulgaris L. (Lamiaceae), a well-known aromatic medicinal herb, has many important essential constituents in its oil, including γ-terpinene, carvacrol, thymol, and p-cymene. Gibberellins comprise hundreds of components, which regulate several various growths and underlying developmental processes, such as cell d...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2018.10.014
更新日期:2018-11-01 00:00:00
abstract::Agronomic performance of transgenic tomato overexpressing functional genes has rarely been investigated in the field. In an attempt to improve low-phosphate (P) stress tolerance of tomato (Solanum lycopersicum) plants and promote tomato fruit production in the field, an expression vector containing cDNA to an Arabidop...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2018.04.005
更新日期:2018-07-01 00:00:00
abstract::A non-destructive nitrogen (N) detector [Agriexpert PPW-3000 (PPW-3000)] is a useful device for rapid and non-destructive measurement of leaf N content. However, some studies find a poor correlation between the PPW-3000 reading and the actual leaf N content; the R2 value of the approximate equation was low. To improve...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2005.09.004
更新日期:2006-04-01 00:00:00
abstract::Reports on the effect of nitric oxide (NO) or reactive oxygen species (ROS) on photosynthesis and respiration in leaf tissues are intriguing; therefore, the effects of exogenous addition of sodium nitroprusside (SNP, releases NO) or H2O2 on the photosynthetic O2 evolution and respiratory O2 uptake by mesophyll protopl...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2020.153133
更新日期:2020-01-01 00:00:00
abstract::No significant changes were detected in the proportions of the various monosaccharides present in the cell wall polysaccharides of the peripheral cell layers on the upper and lower sides of sunflower hypocotyls which had undergone gravicurvature. The incorporation of radioactive glucose into the major classes of polys...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/S0176-1617(85)80164-4
更新日期:1985-02-01 00:00:00
abstract::Fig fruit is well-known for its attractive flavor, color, and nutritional and medicinal value. Anthocyanin contributes to the fruit's color and constitutes a high percentage of the total antioxidant content of the fig fruit. We quantified the major anthocyanins and characterized the expression levels of anthocyanin-bi...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2020.153192
更新日期:2020-08-01 00:00:00
abstract::Environmental constraints disturb plant metabolism and are often associated with photosynthetic impairments and yield reductions. Among them, low positive temperatures are of up most importance in tropical plant species, namely in Coffea spp. in which some acclimation ability has been reported. To further explain cold...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2010.11.013
更新日期:2011-05-15 00:00:00
abstract::The effects of Fe deficiency on different metabolic processes were characterized in roots, xylem sap and leaves of tomato. The total organic acid pool increased significantly with Fe deficiency in xylem sap and leaves of tomato plants, whereas it did not change in roots. However, the composition of the pool changed wi...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2008.06.011
更新日期:2009-03-01 00:00:00
abstract::Blueberry (Vaccinium sp.) is thought to display a preference for the ammonium (NH4+) form over the nitrate (NO3-) form of inorganic nitrogen (N). This N-source preference has been associated with a generally low capacity to assimilate the NO3- form of N, especially within the shoot tissues. Nitrate assimilation is med...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2017.05.014
更新日期:2017-09-01 00:00:00
abstract::Nod factors (Lipo-chitooligosaccharides, or LCOs) act as bacteria-to-plant signal molecules that modulate early events of the Bradyrhizobium-soybean symbiosis. It is known that low root zone temperature inhibits the early stages of this symbiosis; however, the effect of low soil temperature on bacteria-to-plant signal...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2005.04.029
更新日期:2006-01-01 00:00:00
abstract::The goal of the present research was to obtain new insights into the mechanisms underlying drought stress resistance in plants. Specifically, we evaluated changes in the expression of genes encoding enzymes involved in isoprenoid biosynthesis, together with the levels of the corresponding metabolites (chlorophylls, ca...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2008.02.011
更新日期:2009-01-30 00:00:00
abstract::Stomata formed at high relative air humidity (RH) close less as leaf dries; an effect that varies depending on the genotype. We here quantified the contribution of each stomatal response characteristic to the higher water loss of high RH-grown plants, and assessed the relationship between response characteristics and ...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2013.04.007
更新日期:2013-10-15 00:00:00
abstract::Gibberellins (GAs) are the plant hormones that control many aspects of plant growth and development, including stem elongation. Genes encoding enzymes related to the GA biosynthetic and metabolic pathway have been isolated and characterized in many plant species. Gibberellin 2-oxidase (GA2ox) catalyzes bioactive GAs o...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2013.05.002
更新日期:2013-11-01 00:00:00
abstract::Expansins have long been implicated in the control of cell wall extensibility. However, despite ample evidence supporting a role for these proteins in the endogenous mechanism of plant growth, there are also examples in the literature where the outcome of altered expansin gene expression is difficult to reconcile with...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2013.09.009
更新日期:2014-02-15 00:00:00
abstract::Currents flowing through slow vacuolar SV channels of rape (Brassica napus) growing on media supplemented with Cd²+ (400 μM), and/or SeO₄(²⁻) (2μM) were examined. The aim of the study was to investigate the role of Cd²+ in modulation of SV channel activity and to determine whether Se reverses the effect of cadmium. Va...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2010.06.016
更新日期:2010-12-15 00:00:00
abstract::Silicon (Si) may be involved in metabolic, physiological, and/or structural activity in higher plants exposed to abiotic and biotic stresses. This has not yet been determined due to the absence of direct evidence that it is part of the molecule of an essential plant constituent or metabolite. The aim of this study was...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2010.04.011
更新日期:2010-10-15 00:00:00
abstract::Our previous study suggests that salicylic acid mediates tolerance in barley plants to paraquat (Ananieva et al. 2002). To further define the role of SA in paraquat induced responses, we analysed the capacity of the antioxidative defence system by measuring the activities of several antioxidative enzymes: superoxide d...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1078/0176-1617-01022
更新日期:2004-03-01 00:00:00
abstract::This study investigates the influence of various rootstocks for pear on the phytochemical composition in the phloem above and below the graft union and the role of phenols in pear graft incompatibility. Assays of phloem with cambium from 4-year-old 'Conference', 'Abate Fetel' and 'Williams' pear trees grafted on diffe...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2013.10.022
更新日期:2014-03-01 00:00:00
abstract::In this report a full-length cDNA, SPCP2, which encoded a putative papain-like cysteine protease was isolated from senescent leaves of sweet potato (Ipomoea batatas). SPCP2 contained 1101 nucleotides (366 amino acids) in its open reading frame, and exhibited high amino acid sequence identities (ca. 68% to 83%) with pl...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2010.01.005
更新日期:2010-07-01 00:00:00
abstract::Ion-selective microelectrodes are a powerful tool in studying adaptive responses of plant cells and tissues to various abiotic stresses. However, application of this technique in Na(+) flux measurements was limited due to poor selectivity for Na(+) ions of commercially available Na(+) cocktails. Often, these cocktails...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2010.12.006
更新日期:2011-07-01 00:00:00
abstract::Pistacia chinensis Bunge (P. chinensis) is a deciduous and dioecious perennial arbor of the family Anacardiaceae that flowers from March to April and bears fruit from September to October. There are three rapidly growing stages in the annual growth process of P. chinensis. However, the knowledge of the secondary metab...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2015.11.014
更新日期:2016-02-01 00:00:00