Coordinating Sulfur Pools under Sulfate Deprivation. (December 2020)

• Record Type: Journal Article
• Authors: Aarabi, Fayezeh; Naake, Thomas; Fernie, Alisdair R.; Hoefgen, Rainer
• Is Part Of: Trends in plant science. Volume 25:Number 12(2020)
• Page Start: 1227
• Page End: 1239
• Publication Date: 2020-12
• Subjects: sulfate deficiency -- SDI -- glucosinolate; Botany -- Periodicals; Botanique -- Périodiques; Botany; Periodicals; 580.5
• DOI: 10.1016/j.tplants.2020.07.007
• Languages: English
• ISSNs: 1360-1385

Abstract

Abstract : Plants display manifold metabolic changes on sulfate deficiency (S deficiency) with all sulfur-containing pools of primary and secondary metabolism affected. O -Acetylserine (OAS), whose levels are rapidly altered on S deficiency, is correlated tightly with novel regulators of plant sulfur metabolism that have key roles in balancing plant sulfur pools, including the Sulfur Deficiency Induced genes ( SDI1 and SDI2 ), More Sulfur Accumulation1 ( MSA1 ), and GGCT2;1 . Despite the importance of OAS in the coordination of S pools under stress, mechanisms of OAS perception and signaling have remained elusive. Here, we put particular focus on the general OAS-responsive genes but also elaborate on the specific roles of SDI1 and SDI2 genes, which downregulate the glucosinolate (GSL) pool size. We also highlight the key open questions in sulfur partitioning. Highlights: Sulfur depletion has detrimental effects on plant metabolism and growth especially in high-S-demanding crops such as rapeseed. Plants possess multiple mechanisms of adaptation that aid the homeostasis of sulfur metabolism to allow their survival. Sulfur-deficiency-marker genes have been long identified using systems biology approaches; some of them display critical roles in balancing the sulfur pools on sulfur depletion.