Underexpression of apoplastic polyamine oxidase improves thermotolerance in Nicotiana tabacum

被引：29

作者：

Mellidou, Ifigeneia ^{[1
]}

Karamanoli, Katerina ^{[1
]}

Beris, Despoina ^{[2
]}

Haralampidis, Kosmas ^{[2
]}

Constantinidou, Helen-Isis A. ^{[1
]}

Roubelakis-Angelakis, Kalliopi A. ^{[3
]}

机构：

[1] Aristotle Univ Thessaloniki, Sch Agr, Thessaloniki 54124, Greece

[2] Univ Athens, Dept Biol, Univ Campus, Athens 15784, Greece

[3] Univ Crete, Dept Biol, Voutes Univ Campus, Iraklion 70013, Greece

来源：

JOURNAL OF PLANT PHYSIOLOGY | 2017年 / 218卷

关键词：

Antioxidants; Heat stress; Phenolics; Photosynthesis; Polyamine homeostasis; Polyamine oxidase; PAO transgenics; Thermotolerance; CELL DIVISION/EXPANSION; OXIDATIVE BURST; TOBACCO PLANT; STRESS; CATABOLISM; TOLERANCE; TOMATO;

D O I：

10.1016/j.jplph.2017.08.006

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

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.

引用

页码：171 / 174

页数：4

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