Relationship between cadmium-induced root subapical hair development and ethylene biosynthesis in oilseed rape seedlings

22Citations
Citations of this article
16Readers
Mendeley users who have this article in their library.

Abstract

It has long been observed that toxic heavy metals at different concentrations can induce root hair development in plants. In oilseed rape we studied ethylene levels and root hair initiation under Cd2+ stress. Growth of the primary root was inhibited but close to root tips the development of subapical root hairs was significantly stimulated by Cd2+ at 30 μM. Versus the control, the distance between the root tip and the root hair zone and the length of the epidermal cell in the elongation zone were significantly reduced by Cd2+ at the same concentration. Exogenous application of Cd2+ and 1-aminocyclopropane-1-carboxylate (ACC) to roots had similar effects on subapical root hair development. Hair density increase and hair elongation in the presence of Cd2+ were reduced by the ethylene inhibitors CoCl2 at 15 μM and aminooxyacetic acid (AOA) at 10 μM. Exposing roots to Cd2+ caused a rapid increase in superoxide radical (O2·-) production in the root hair differentiation zone, and at the tips of emerging and newly formed root hairs. Cd2+-induced O2- production at the growing hair tips was blocked in the presence of AOA. Our findings suggest that Cd2+-induced ethylene signaling may act upstream of O2·-. Cd2+ promotion of O2- production may operate through an ethylene signaling pathway, and O2- itself may stimulate root hair elongation. © Polish Academy of Sciences and Jagiellonian University, Cracow 2013.

Cite

CITATION STYLE

APA

Sun, X., & Guo, L. (2013). Relationship between cadmium-induced root subapical hair development and ethylene biosynthesis in oilseed rape seedlings. Acta Biologica Cracoviensia Series Botanica, 55(2), 68–75. https://doi.org/10.2478/abcsb-2013-0018

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free