The Arabidopsis PLAT domain protein1 promotes abiotic stress tolerance and growth in tobacco

0453732 - ÚVGZ 2016 RIV NL eng J - Journal Article
Hyun, T.K. - Albacete, A. - van der Graaff, E. - Eom, S. H. - Großkinsky, D.K. - Böhm, H. - Janschek, U. - Rim, Y. - Ali, W. - Kim, S.Y. - Roitsch, Thomas
The Arabidopsis PLAT domain protein1 promotes abiotic stress tolerance and growth in tobacco.
Transgenic Research. Roč. 24, č. 4 (2015), s. 651-663. ISSN 0962-8819. E-ISSN 1573-9368
Institutional support: RVO:67179843
Keywords : Abiotic stress * Biotic stress * Plant growth * AtPLAT1 gene * Tobacco
Subject RIV: EH - Ecology, Behaviour
Impact factor: 2.054, year: 2015

Plant growth and consequently crop yield can be severely compromised by abiotic and biotic stress conditions. Transgenic approaches that resulted in increased tolerance against abiotic stresses often were typically accompanied by adverse effects on plant growth and fitness under optimal growing conditions. Proteins that belong to the PLAT-plant-stress protein family harbour a single PLAT (Triacylglycerol lipase) domain and are ubiquitously present in monocot and dicot plant species. Until now, only limited data is available for PLAT-plant-stress family members, which suggested that these proteins in general could promote tolerance towards stress responses. We studied the function of the Arabidopsis PLAT-plant-stress protein AtPLAT1 employing heterologous gain-of-function analysis in tobacco. AtPLAT1 conferred increased abiotic stress tolerance in tobacco, evident by improved tolerance towards cold, drought and salt stresses, and promoted growth, reflected by a faster development under non-stressed conditions. However, the overexpression of AtPLAT1 in tobacco reduced the tolerance towards biotic stress conditions and, therefore, could be involved in regulating the crosstalk between abiotic and biotic stress responses. Thus, we showed that heterologously expressed AtPLAT1 functions as positive regulator of abiotic stress tolerance and plant growth, which could be an important new asset for strategies to develop plants with improved abiotic stress tolerance, without growth and subsequent yield penalties under optimal growth conditions.
Permanent Link: http://hdl.handle.net/11104/0254511