title: A New Insight of Salt Stress Signaling in Plant.
abstract: Many studies have been conducted to understand plant stress responses to salinity because irrigation-dependent salt accumulation compromises crop productivity and also to understand the mechanism through which some plants thrive under saline conditions. As mechanistic understanding has increased during the last decades, discovery-oriented approaches have begun to identify genetic determinants of salt tolerance. In addition to osmolytes, osmoprotectants, radical detoxification, ion transport systems, and changes in hormone levels and hormone-guided communications, the Salt Overly Sensitive (SOS) pathway has emerged to be a major defense mechanism. However, the mechanism by which the components of the SOS pathway are integrated to ultimately orchestrate plant-wide tolerance to salinity stress remains unclear. A higher-level control mechanism has recently emerged as a result of recognizing the involvement of GIGANTEA (GI), a protein involved in maintaining the plant circadian clock and control switch in flowering. The loss of GI function confers high tolerance to salt stress via its interaction with the components of the SOS pathway. The mechanism underlying this observation indicates the association between GI and the SOS pathway and thus, given the key influence of the circadian clock and the pathway on photoperiodic flowering, the association between GI and SOS can regulate growth and stress tolerance. In this review, we will analyze the components of the SOS pathways, with emphasis on the integration of components recognized as hallmarks of a halophytic lifestyle.
authors.affiliation: Division of Applied Life Science (BK21 Plus Program), Plant Molecular Biology and Biotechnology Research Center, Jinju 52828, Korea.
authors.forename: Hee Jin
authors.initials: HJ
authors.lastname: Park
authors.affiliation: Division of Applied Life Science (BK21 Plus Program), Plant Molecular Biology and Biotechnology Research Center, Jinju 52828, Korea.|Institute of Agriculture & Life Sciences, Graduate School of Gyeongsang National University, Jinju 52828, Korea.
authors.forename: Woe-Yeon
authors.initials: WY
authors.lastname: Kim
authors.affiliation: Division of Applied Life Science (BK21 Plus Program), Plant Molecular Biology and Biotechnology Research Center, Jinju 52828, Korea.
authors.forename: Dae-Jin
authors.initials: DJ
authors.lastname: Yun
mesh_terms: D057906:Circadian Clocks; D018521:Plant Physiological Phenomena; D010940:Plant Proteins / Q000235:genetics*; D055049:Salt Tolerance; D015398:Signal Transduction; D013312:Stress, Physiological
chemical_list: D010940:Plant Proteins
keywords: GIGANTEA; NaCl; circadian clock; salinity; salt overly sensitive pathway