Copper induced root growth inhibition of Allium cepa var. Agrogarum L. involves disturbances in cell division and DNA damage

Rong Qin, Congyue Wang, Da Chen, Lars Olof Björn, Shaoshan Li

    Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

    Sammanfattning

    Copper (Cu) is considered to be an indispensable microelement for plants. Excessive Cu, however, is toxic and disturbs several
    processes in the plant. The present study addressed the effects of ionic Cu (2.0 mMand 8.0mM) on mitosis, the microtubule cytoskeleton,
    and DNA in root tip cells of Allium cepa var. agrogarum L. to better understand Cu toxicity on plant root systems. The results indicated that Cu accumulated in roots and that root growth was inhibited dramatically in Cu treatment groups. Chromosomal aberrations (for example, C-mitosis, chromosome bridges, chromosome stickiness, and micronucleus) were observed, and the mitotic index decreased during Cu treatments at different concentrations. Microtubules were one of the target sites of Cu toxicity in root tip meristematic cells, and Cu exposure substantially impaired microtubule arrangements. The content of a-tubulin decreased following 36 h of exposure to 2.0mM or 8.0mM of Cu in comparison with the control group. Copper increased DNA damage and suppressed cell cycle progression. The above toxic effects became more serious with increasing Cu concentration and prolonged exposure time.
    Originalspråkengelska
    Sidor (från-till)1045–1055
    Antal sidor11
    TidskriftEnvironmental Toxicology and Chemistry
    Volym34
    Nummer5
    DOI
    StatusPublished - 2015 apr. 21

    Ämnesklassifikation (UKÄ)

    • Biokemi och molekylärbiologi
    • Botanik

    Fingeravtryck

    Utforska forskningsämnen för ”Copper induced root growth inhibition of Allium cepa var. Agrogarum L. involves disturbances in cell division and DNA damage”. Tillsammans bildar de ett unikt fingeravtryck.

    Citera det här