Plant cell gravisensitivity and adaptation to microgravity.

A short overview on the effects of real and simulated microgravity on certain cell components and processes, including new information obtained recently, is presented. Attention is focused on the influence of real and simulated microgravity on plant cells that are not specialised to gravity perception and on seed formation. The paper considers the possibility of full adaptation of plants to microgravity, and suggests some questions for future plant research in order to make decisions on fundamental and applied problems of plant space biology.