Xylem-based long-distance transport and phloem remobilization of copper in Salix integra Thunb.

07:00 EST 28th February 2020 | BioPortfolio

Summary of "Xylem-based long-distance transport and phloem remobilization of copper in Salix integra Thunb."

Due to high biomass and an ability to accumulate metals, fast-growing tree species are good candidates for phytoremediation. However, little is known about the long-distance transport of heavy metals in woody plants. The present work focused on the xylem transport and phloem remobilization of copper (Cu) in Salix integra Thunb. Seedlings with 45 d preculture were grown in nutrient solutions added with 0.32 and 10 μM CuSO for 5 d. Micro X-ray fluorescence imaging showed the high Cu intensity in xylem tissues of both stem and root cross sections, confirming that the xylem played a vital role in Cu transport from roots to shoots. Cu was presented in both xylem sap and phloem exudate, which demonstrates the long-distance transport of Cu via both vascular tissues. Additionally, the Cu spiked mature leaf exported approximately 78 % Cu to newly emerged shoots, and approximately 22 % downward to the new roots, confirming the bidirectional transport of Cu via phloem. To our knowledge, this is the first report to characterize Cu vascular transport and remobilization in fast-growing woody plants, and the findings provide valuable mechanistic understanding for the phytoremediation of Cu-contaminated soils.


Journal Details

This article was published in the following journal.

Name: Journal of hazardous materials
ISSN: 1873-3336
Pages: 122428


DeepDyve research library

PubMed Articles [24819 Associated PubMed Articles listed on BioPortfolio]

Dynamics of xylem and phloem sap flow in an outdoor zelkova tree visualized by magnetic resonance imaging.

Xylem and phloem sap flows in an intact, young Japanese zelkova tree (Zelkova serrata [Thunb.] Makino) growing outdoors were measured using magnetic resonance imaging (MRI). Two propagator-based seque...

ABC Transporter OsABCG18 Controls the Shootward Transport of Cytokinins and Grain Yield in Rice.

Cytokinins are one of the most important phytohormones and play essential roles in multiple life processes in planta. Root-derived cytokinins are transported to the shoots via long-distance transport....

Detection and in vitro studies of Cucurbita maxima phloem serpin-1 RNA-binding properties.

Apart from being a conduit for photoassimilate transport in plants, the phloem serves as a pathway for transport of proteins and RNAs from sites of their synthesis to distant plant parts. As demonstra...

Vascular cambium-localized AtSPDT mediates xylem-to-phloem transfer of phosphorus for its preferential distribution in Arabidopsis.

Recent progress has shown that the preferential distribution of mineral nutrients is mediated by node-based transporters in gramineous plants, but it is poorly understood for the mechanisms of prefere...

Acropetal translocation of phenanthrene in wheat seedlings: Xylem or phloem pathway?

Due to the potential toxicity of polycyclic aromatic hydrocarbons (PAHs) to humans, the uptake and translocation of PAHs in food crops have gained much attention. However, it is still unclear whether ...

Clinical Trials [7575 Associated Clinical Trials listed on BioPortfolio]

Pressure Injury Prevention in AE and PFC

This study evaluates the effect of a multilayer skin dressing (Mepilex) placed on the sacrum or a fluid filled pad (LiquiCell) on risk factors for pressure injuries under conditions consis...

A Phase Ib Study of Intravenous Copper Loading With Oral Disulfiram in Metastatic, Castration Resistant Prostate Cancer

The purpose of this study is to determine the safety and optimal dosing of intravenous copper chloride and disulfiram in men with metastatic castrate-resistant prostate cancer (CRPC). Elig...

Immediate vs. Delayed Insertion of Copper T 380A IUD After Termination of Pregnancy Over 12-Weeks Gestation

The purpose of this study is to compare delayed vs. immediate insertion of the Copper T 380 IUD after termination of pregnancy after 12 weeks.

Human Biomarkers for Assessing Copper Deficiency

Copper is an essential nutrient for humans and is cofactor in enzymes that participate in critical body functions. Insufficient copper can lead to hematological and neurological abnormali...

IMPACT STUDY: Investigating Microbial Pathogen Activity of Copper Textiles

The purpose of this study is to assess the impact of copper linens on hospital acquired infections and drug resistant bacteria.

Medical and Biotech [MESH] Definitions

Plant tissue that carries nutrients, especially sucrose, by turgor pressure. Movement is bidirectional, in contrast to XYLEM where it is only upward. Phloem originates and grows outwards from meristematic cells (MERISTEM) in the vascular cambium. P-proteins, a type of LECTINS, are characteristically found in phloem.

Plant tissue that carries water up the root and stem. Xylem cell walls derive most of their strength from LIGNIN. The vessels are similar to PHLOEM sieve tubes but lack companion cells and do not have perforated sides and pores.

A strand of primary conductive plant tissue consisting essentially of XYLEM, PHLOEM, and CAMBIUM.

P-type ATPases which transport copper ions across membranes in prokaryotic and eukaryotic cells. They possess a conserved CYSTEINE-HISTIDINE-SERINE (CPx) amino acid motif within their transmembrane helices that functions in cation translocation and catalytic activation, and an N-terminal copper-binding CxxC motif that regulates enzyme activity. They play essential roles in intracellular copper homeostasis through regulating the uptake, efflux and storage of copper ions, and in cuproprotein biosynthesis.

An inherited disorder of copper metabolism transmitted as an X-linked trait and characterized by the infantile onset of HYPOTHERMIA, feeding difficulties, hypotonia, SEIZURES, bony deformities, pili torti (twisted hair), and severely impaired intellectual development. Defective copper transport across plasma and endoplasmic reticulum membranes results in copper being unavailable for the synthesis of several copper containing enzymes, including PROTEIN-LYSINE 6-OXIDASE; CERULOPLASMIN; and SUPEROXIDE DISMUTASE. Pathologic changes include defects in arterial elastin, neuronal loss, and gliosis. (From Menkes, Textbook of Child Neurology, 5th ed, p125)

Quick Search

DeepDyve research library

Relevant Topics

Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...

Vascular relates to blood vessels (Oxford Medical Dictionary) and can be used to describe the supply of blood, a disease affecting the blood vessels or molecules associated with these structures. For example, <!--LGfEGNT2Lhm-->atherosclerosis ...

Blood is a specialized bodily fluid that delivers necessary substances to the body's cells (in animals) – such as nutrients and oxygen – and transports waste products away from those same cells.  In vertebrates, it is composed of blo...

Searches Linking to this Article