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Underexpression of apoplastic polyamine oxidase improves thermotolerance in Nicotiana tabacum
- Source :
- Journal of plant physiology. 218
- Publication Year :
- 2017
-
Abstract
- Polyamines (PAs) and hydrogen peroxide (H2O2), the product of PA oxidation by polyamine oxidase (PAO), are potential players affecting plant growth, development and responses to abiotic/biotic stresses. Genetically modified Nicotiana tabacum plants with altered PA/H2O2 homeostasis due to over/underexpression of the ZmPAO gene (S-ZmPAO/AS-ZmPAO, respectively) were assessed under heat stress (HS). Underexpression of ZmPAO correlates with increased thermotolerance of the photosynthetic machinery and improved biomass accumulation, accompanied by enhanced levels of the enzymatic and non-enzymatic antioxidants, whereas ZmPAO overexpressors exhibit significant impairment of thermotolerance. These data provide important clues on PA catabolism/H2O2/thermotolerance, which merit further exploitation.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Thermotolerance
Physiology
Nicotiana tabacum
Plant Science
01 natural sciences
Zea mays
03 medical and health sciences
chemistry.chemical_compound
Plant Growth Regulators
Gene Expression Regulation, Plant
Tobacco
Polyamines
Hydrogen peroxide
Plant Proteins
chemistry.chemical_classification
Oxidoreductases Acting on CH-NH Group Donors
biology
Catabolism
fungi
food and beverages
Hydrogen Peroxide
biology.organism_classification
Plants, Genetically Modified
Apoplast
Genetically modified organism
030104 developmental biology
Enzyme
Biochemistry
chemistry
Polyamine homeostasis
Agronomy and Crop Science
Polyamine oxidase
Oxidation-Reduction
010606 plant biology & botany
Subjects
Details
- ISSN :
- 16181328
- Volume :
- 218
- Database :
- OpenAIRE
- Journal :
- Journal of plant physiology
- Accession number :
- edsair.doi.dedup.....9344780be8e83e88d2a43d168c4ce4a1