Coupling of Cell Division and Differentiation in Cultured Cells with Interaction of Ethylene and ABA Signaling Pathways.

Recent studies indicate direct links between molecular cell cycle and cell differentiation machineries. Ethylene and abscisic acid (ABA) are known to affect cell division and differentiation, but the mechanisms of such effects are poorly understood. As ethylene and ABA signaling routes may interact, we examined their involvement in cell division and differentiation in cell tissue cultures derived from several plants: wild type (Col-0), and ethylene-insensitive mutants and .

Nitric Oxide Has a Concentration-Dependent Effect on the Cell Cycle Acting EIN2 in Cultured Cells.

Ethylene is known to influence the cell cycle (CC) via poorly characterized roles whilst nitric oxide (NO) has well-established roles in the animal CC but analogous role(s) have not been reported for plants. As NO and ethylene signaling events often interact we examined their role in CC in cultured cells derived from wild-type (Col-0) plants and from ethylene-insensitive mutant plants. Both NO and ethylene were produced mainly during the first 5 days of the sub-cultivation period corresponding to the period of active cell division.