title: Maintenance of meristem activity under stress: is there an interplay of RSS1-like proteins with the RBR pathway?
abstract: Plants have acquired rapid responses to a constantly changing environment. These adaptive and protective responses are the result of a complex signalling network regulating different aspects, ranging from ion homeostasis to cell cycle control. It is well established that stress inhibits cell division, which negatively impacts plant growth and development and hence results in biomass decrease and yield loss. Therefore understanding the link between stress perception and cell cycle control would allow development of new crops with increased productivity when subjected to stress. However, studies on cell cycle control under stress have been limited to well-known regulators of the cell cycle such as cyclins and stress-related phytohormone integrators. The recent discovery of RSS1, a novel intrinsically unstructured protein of rice, opened up new insights into how stress perception can be connected with cell cycle control in meristematic zones. Whereas RSS1 is well conserved among other plant lineages, eudicots present proteins sharing little sequence homology with RSS1. Here, we discuss how RSS1-like proteins might also be functional in dicots, and possibly act through the retinoblastoma-related pathway to regulate both S-phase transition and cell fate in meristems.
authors.affiliation: Laboratory of Plant Protection and Improvement, Center of Biotechnology of Sfax, Sfax, Tunisia.|Institute of Biotechnology, University of Sfax, Sfax, Tunisia.
authors.forename: C
authors.identifier: http://orcid.org/0000-0001-6942-9735
authors.initials: C
authors.lastname: Ebel
authors.affiliation: Laboratory of Plant Protection and Improvement, Center of Biotechnology of Sfax, Sfax, Tunisia.|Institute of Biotechnology, University of Sfax, Sfax, Tunisia.
authors.forename: M
authors.initials: M
authors.lastname: Hanin
mesh_terms: D017360:Arabidopsis / Q000502:physiology; D018519:Meristem / Q000502:physiology*; D008954:Models, Biological; D010940:Plant Proteins / Q000378:metabolism*; D015398:Signal Transduction; D013312:Stress, Physiological
chemical_list: D010940:Plant Proteins
keywords: Abiotic stress; PANS1/CMR1; RSS1-like; cell cycle control; cell fate