title: Silicon: a duo synergy for regulating crop growth and hormonal signaling under abiotic stress conditions.
abstract: Abiotic stresses, such as salinity, heavy metals and drought, are some of the most devastating factors hindering sustainable crop production today. Plants use their own defensive strategies to cope with the adverse effects of these stresses, via the regulation of the expression of essential phytohormones, such as gibberellins (GA), salicylic acid (SA), jasmonates (JA), abscisic acid (ABA) and ethylene (ET). However, the efficacy of the endogenous defensive arsenals of plants often falls short if the stress persists over an extended period. Various strategies are developed to improve stress tolerance in plants. For example, silicon (Si) is widely considered to possess significant potential as a substance which ameliorate the negative effects of abiotic stresses, and improves plant growth and biomass accumulation. This review aims to explain how Si application influences the signaling of the endogenous hormones GA, SA, ABA, JA and ET during salinity, wounding, drought and metal stresses in crop plants. Phytohormonal cross talk plays an important role in the regulation of induced defences against stress. However, detailed molecular and proteomic research into these interactions is needed in order to identify the underlying mechanisms of stress tolerance that is imparted by Si application and uptake.
authors.affiliation: a School of Applied Biosciences, Kyungpook National University , Daegu , Republic of Korea.|b Division of Plant Sciences and National Center for Soybean Biotechnology , University of Missouri-Columbia , MO , USA , and.
authors.forename: Yoon-Ha
authors.initials: YH
authors.lastname: Kim
authors.affiliation: c UoN Chair of Medicinal Plants and Marine Natural Products, University of Nizwa , Nizwa , Oman.
authors.forename: Abdul Latif
authors.initials: AL
authors.lastname: Khan
authors.affiliation: a School of Applied Biosciences, Kyungpook National University , Daegu , Republic of Korea.
authors.forename: In-Jung
authors.initials: IJ
authors.lastname: Lee
mesh_terms: D018556:Crops, Agricultural / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D000075322:Heavy Metal Poisoning; D010937:Plant Growth Regulators / Q000378:metabolism*; D011041:Poisoning; D054712:Salinity; D012825:Silicon / Q000494:pharmacology*; D013312:Stress, Physiological / Q000187:drug effects* / Q000502:physiology
chemical_list: D010937:Plant Growth Regulators; D012825:Silicon
keywords: Crop plant growth; drought; heavy metal; phytohormonal signaling; salinity; silicon wounding