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Author Jung, Ji-Yul ♦ Shin, Ryoung ♦ Schachtman, Daniel P.
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher American Society of Plant Biologists
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Biochemistry ♦ Genetics and evolution ♦ Natural history of organisms ♦ Technology ♦ Medicine & health ♦ Human anatomy, cytology, histology ♦ Human physiology ♦ Pharmacology and therapeutics
Subject Domain (in MeSH) Plant Structures ♦ Anatomy ♦ Eukaryota ♦ Organisms ♦ Inorganic Chemicals ♦ Organic Chemicals ♦ Amino Acids, Peptides, and Proteins ♦ Chemicals and Drugs ♦ Chemical Phenomena ♦ Genetic Phenomena ♦ Physiological Phenomena ♦ Biological Sciences
Subject Keyword Discipline Botany ♦ Arabidopsis ♦ Metabolism ♦ Ethylenes ♦ Potassium ♦ Stress, Physiological ♦ Drug Effects ♦ Genetics ♦ Growth & Development ♦ Arabidopsis Proteins ♦ Biosynthesis ♦ Gene Expression Regulation, Plant ♦ Glycine ♦ Analogs & Derivatives ♦ Pharmacology ♦ Plant Roots ♦ Potassium-hydrogen Antiporters ♦ Reactive Oxygen Species ♦ Signal Transduction ♦ Silver ♦ Symporters ♦ Journal Article
Abstract Potassium deprivation leads to large reductions in plant growth and yields. How plants sense and transduce the stress signals initiated by potassium deprivation is poorly understood. Both ethylene production and the transcription of genes involved in ethylene biosynthesis increase when plants are deprived of potassium. To elucidate the role of ethylene in low potassium signaling pathways, we used both genetic and chemical approaches. Our results showed that ethylene is important in tolerance to low potassium and for changes in both root hair and primary root growth in Arabidopsis thaliana. We show that ethylene acts upstream of reactive oxygen species in response to potassium deprivation. The expression of High-Affinity K(+) Transporter5 was used as a marker of potassium deprivation and was found to be dependent on ethylene signaling. In the ethylene insensitive2-1 (ein2-1) mutant, the ethylene-mediated low potassium responses were not completely eliminated, suggesting that some potassium deprivation-induced responses are either ethylene independent or EIN2 independent. Ethylene signaling is a component of the plant's response to low potassium that stimulates the production of reactive oxygen species and is important for changes in root morphology and whole plant tolerance to low potassium conditions.
Description Country affiliation: United States
Author Affiliation: Jung JY ( Donald Danforth Plant Science Center, St. Louis, Missouri 63132, USA.)
ISSN 10404651
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-02-01
Publisher Place United States
e-ISSN 1531298X
Volume Number 21
Issue Number 2

Source: WHO-Global Index Medicus