Primary stress response induced by different elements is mediated through auxin signalling in barley root tip

• Autorzy: Zelinova V. , Alemayehu A. , Bocova B. , Huttova J. , Mistrik I. , Tamas L.
• Języki publikacji: EN

Abstrakty

EN

Short-term exposure (15 min) of barley roots to different chemical elements revealed that Cd, Cu, Hg and Pb were the most toxic ones causing a marked root growth inhibition even at µM concentrations. Gd, La, Al, Cr, As, Zn, Ni and Se inhibited root growth to a similar extent only at mM concentrations. Despite the high 20 mM concentration, Co caused only a slight, while Mn, Mg or Ca did not evoke any root growth inhibition. Elements at concentrations inhibiting root growth caused a considerable accumulation of indole-3-acetic acid in the root apex. While Cr, As and Zn inhibited, Cd, Cu, Hg, Pb, Gd, La and Al markedly stimulated the generation of reactive oxygen species in the beginning of differentiation zone. Auxin signalling inhibitor alleviated or prevented root growth inhibition, reactive oxygen species generation and the stimulation of lipoxygenase and glutathione peroxidase activity by various elements, indicating a key role of auxin signalling in the stress response of barley root tip. On the other hand, it did not affect or even had an additive effect on dehydroascorbate reductase and ascorbic acid oxidase activity in combination with different elements. Our results indicate that the primary response of barley roots to the presence of various chemical elements during the shortterm treatment is not a specific but rather a general adaptive stress response enabling the plant to survive adverse conditions.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2014
• Tom: 36
• Numer: 11
• Opis fizyczny: p.2935-2946,fig.,ref.

Twórcy

autor

Zelinova V.

• Institute of Botany, Slovak Academy of Sciences, Dubravska cesta 9, 84523, Bratislava, Slovak Republic

autor

Alemayehu A.

• Institute of Botany, Slovak Academy of Sciences, Dubravska cesta 9, 84523, Bratislava, Slovak Republic

autor

Bocova B.

• Institute of Botany, Slovak Academy of Sciences, Dubravska cesta 9, 84523, Bratislava, Slovak Republic

autor

Huttova J.

• Institute of Botany, Slovak Academy of Sciences, Dubravska cesta 9, 84523, Bratislava, Slovak Republic

autor

Mistrik I.

• Institute of Botany, Slovak Academy of Sciences, Dubravska cesta 9, 84523, Bratislava, Slovak Republic

autor

Tamas L.

• Institute of Botany, Slovak Academy of Sciences, Dubravska cesta 9, 84523, Bratislava, Slovak Republic

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Identyfikatory

DOI

10.1007/s11738-014-1665-y