title: Nitric oxide signaling in aluminum stress in plants.
abstract: Nitric oxide (NO) is a ubiquitous signal molecule involved in multiple plant responses to environmental stress. In the recent years, the regulating role of NO on heavy metal toxicity in plants is realized increasingly, but knowledge of NO in alleviating aluminum (Al) toxicity is quite limited. In this article, NO homeostasis between its biosynthesis and elimination in plants is presented. Some genes involved in NO/Al network and their expressions are also introduced. Furthermore, the role of NO in Al toxicity and the functions in Al tolerance are discussed. It is proposed that Al toxicity may disrupt NO homeostasis, leading to endogenous NO concentration being lower than required for root elongation in plants. There are many evidences that pointed out that the exogenous NO treatments improve Al tolerance in plants through activating antioxidative capacity to eliminate reactive oxygen species. Most of the work with respect to NO regulating pathways and functions still has to be done in the future.
authors.affiliation: College of Agronomy, Guangxi University, Nanning, 530004, China.
authors.forename: Huyi
authors.initials: H
authors.lastname: He
authors.forename: Jie
authors.initials: J
authors.lastname: Zhan
authors.forename: Longfei
authors.initials: L
authors.lastname: He
authors.forename: Minghua
authors.initials: M
authors.lastname: Gu
mesh_terms: D000535:Aluminum / Q000494:pharmacology*; D000975:Antioxidants / Q000378:metabolism; D004249:DNA Damage; D018506:Gene Expression Regulation, Plant; D009569:Nitric Oxide / Q000378:metabolism* / Q000502:physiology; D018384:Oxidative Stress; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D018517:Plant Roots / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D010944:Plants / Q000187:drug effects / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D015398:Signal Transduction; D012989:Soil Pollutants / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D010940:Plant Proteins; D017382:Reactive Oxygen Species; D012989:Soil Pollutants; D009569:Nitric Oxide; D000535:Aluminum