Number of the records: 1

Comparison of hormonal responses to heat, drought and combined stress in tobacco plants with elevated proline content

SYSNO ASEP	0350307
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Comparison of hormonal responses to heat, drought and combined stress in tobacco plants with elevated proline content
Author(s)	Dobrá, Jana (UEB-Q) Motyka, Václav (UEB-Q)_{RID, ORCID} Dobrev, Petre (UEB-Q)_{RID, ORCID} Malbeck, Jiří (UEB-Q)_{RID, ORCID} Prášil, I.T. (CZ) Haisel, Daniel (UEB-Q)_{RID, ORCID} Gaudinová, Alena (UEB-Q)_ORCID Havlová, Marie (UEB-Q) Gubiš, J. (SK) Vaňková, Radomíra (UEB-Q)_{RID, ORCID}
Source Title	Journal of Plant Physiology. - : Elsevier - ISSN 0176-1617 Roč. 167, č. 16 (2010), s. 1360-1370
Number of pages	11 s.
Language	eng - English
Country	PT - Portugal
Keywords	Auxin ; Cytokinin ; Drought
Subject RIV	ED - Physiology
R&D Projects	GA206/06/1306 GA ČR - Czech Science Foundation (CSF)
	GA206/09/2062 GA ČR - Czech Science Foundation (CSF)
	IAA600380701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	OC08013 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	OC09083 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z50380511 - UEB-Q (2005-2011)
UT WOS	000283977600006
DOI	10.1016/j.jplph.2010.05.013
Annotation	Heat stress (40°C) caused a transient increase in the level of bioactive cytokinins (CK), accompanied by down-regulation of the activity of cytokinin oxidase/dehydrogenase (CKX, EC 1.4.3.18/1.5.99.12) in tobacco plants constitutively over-expressing a gene for the proline (Pro) biosynthetic enzyme ∆2-pyrroline-5-carboxylate synthetase (P5CSF129A; EC 2.7.2.11/1.2.1.41) as well as the wild-type. Concomitantly, a transient decrease of abscisic acid was observed. Following drought stress, bioactive CK levels decreased (to lower extent in upper leaves and in roots), more in the wild-type. Exposure to heat stress (40°C for 2 h) at the end of 10-d drought period was associated with stimulation of the activity of CKX in upper leaves and roots, coinciding with down-regulation of bioactive CKs in whole plants. All stresses were associated with elevation of free auxin, indolylacetic acid, in lower leaves and/or in roots. After rehydration, vast elevation of bioactive CKs in leaves was observed.
Workplace	Institute of Experimental Botany
Contact	David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469
Year of Publishing	2011

Number of the records: 1