TY - JOUR

T1 - Ethylene is Involved in the Actin Cytoskeleton Rearrangement During the Root Gravitropic Response of Arabidopsis thaliana

AU - Pozhvanov, G.A.

AU - Gobova, A.E.

AU - Bankin, M.P.

AU - Vissenberg, K.

AU - Medvedev, S.S.

PY - 2016

Y1 - 2016

N2 - Gravitropism, the directed plant growth with respect to the gravity vector, is regulated by auxin and its polar transport system, several secondary messengers, and by the cytoskeleton. Recently we have shown that the actin cytoskeleton in the root transition zone of Arabidopsis thaliana (L.) Heynh was rearranged after gravistimulation (rotation by 90°): the fraction of axially aligned microfilaments decreased and the fraction of oblique and transversally-oriented microfilaments increased. In the present research we have studied the effect of ethylene and inhibitors of its synthesis on actin cytoskeleton rearrangement during the gravitropic response. Application of the ethylene releasing substance ethephon to A. thaliana seedlings led to the disassembly of actin microfilaments as well as their broad angle distribution in cells of the root transition zone. This actin rearrangement was escaped by treatment with the ethylene synthesis inhibitor aminoethoxyvinylglycine (AVG). Another negative regulator of ethylene

AB - Gravitropism, the directed plant growth with respect to the gravity vector, is regulated by auxin and its polar transport system, several secondary messengers, and by the cytoskeleton. Recently we have shown that the actin cytoskeleton in the root transition zone of Arabidopsis thaliana (L.) Heynh was rearranged after gravistimulation (rotation by 90°): the fraction of axially aligned microfilaments decreased and the fraction of oblique and transversally-oriented microfilaments increased. In the present research we have studied the effect of ethylene and inhibitors of its synthesis on actin cytoskeleton rearrangement during the gravitropic response. Application of the ethylene releasing substance ethephon to A. thaliana seedlings led to the disassembly of actin microfilaments as well as their broad angle distribution in cells of the root transition zone. This actin rearrangement was escaped by treatment with the ethylene synthesis inhibitor aminoethoxyvinylglycine (AVG). Another negative regulator of ethylene

KW - Arabidopsis thaliana

KW - gravitropism

KW - ethylene

KW - cytoskeleton

KW - actin

KW - root

KW - elongation zone

KW - ethephon

KW - salicilyc acid

KW - aminoethoxyvinylglycine

U2 - 10.1134/S1021443716050095

DO - 10.1134/S1021443716050095

M3 - Article

VL - 63

SP - 587

EP - 596

JO - Russian Journal of Plant Physiology

JF - Russian Journal of Plant Physiology

SN - 1021-4437

IS - 5

ER -