Disturbances of stem circumnutations evoked by wound-induced variation potentials in Helianthus annuus L

• Autorzy: Stolarz M , Dziubinska H. , Krupa M. , Buda A. , Trebacz K. , Zawadzki T.
• Języki publikacji: EN

Abstrakty

EN

The relationship between evoked electrical activity and stem movements in three-week old sunflowers was demonstrated. Electrical potential changes (recorded by Ag/AgCl extracellular electrodes) and time-lapse images (from a top view camera) were recorded and analyzed. A heat stimulus applied to the tip of one of the second pair of leaves evoked a variation potential, transmitted basipetally along one side of the stem. After stimulation, disturbances of circumnutations occurred. They included: changes in the period, disorders in the elliptical shape, and, in some cases, reversion of direction (of movement). We suggest that asymmetrically propagated variation potential induces asymmetric stem shrinking and bending, which strongly disturbs circumnutations. Our results confirm the involvement of electrical potential changes in the mechanism of stem nutations.

Słowa kluczowe

EN

variation potential; Helianthus annuus; stimulation; electrical activity; sunflower; hydraulic signal; stem; nutation; circumnutation

• Wydawca: -
• Czasopismo: Cellular and Molecular Biology Letters
• Rocznik: 2003
• Tom: 08
• Numer: 1
• Opis fizyczny: p.31-40,fig.

Twórcy

autor

Stolarz M

• Maria Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland

autor

Dziubinska H.

autor

Krupa M.

autor

Buda A.

autor

Trebacz K.

autor

Zawadzki T.

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