Dependence of expression of genes controlling calcium signaling on gravistimulation in cells of tomato apical leaves and treatment by etephon

Abstract

The sensitivity of expression at the level of transcription of genes encoding proteins involved in calcium signal transduction to gravistimulation was revealed using real-time RT-PCR. For three genes SCA2, РВР2, САМ2, the increase in the transcript formation was shown at early response stages, starting from 15–60 minute gravistimulus. The treatment of plants before the start of gravistimulation with an ethephon (source of exogenous ethylene) led to a change in the modulation of expression of the studied genes in response to gravistimulus. The role of calcium metabolism in realization of final steps of gravitropism reaction is considered.