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Responses of Transgenic Tobacco Plants with Increased Proline Content to Drought and/or Heat Stress
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SYSNO ASEP 0369947 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Responses of Transgenic Tobacco Plants with Increased Proline Content to Drought and/or Heat Stress Author(s) Pospíšilová, Jana (UEB-Q) RID
Haisel, Daniel (UEB-Q) RID, ORCID
Vaňková, Radomíra (UEB-Q) RID, ORCIDSource Title American Journal of Plant Sciences - ISSN 2158-2742
Roč. 2, č. 3 (2011), s. 318-324Number of pages 7 s. Language eng - English Country US - United States Keywords Carotenoids ; Chlorophyll ; Net Photosynthetic Rate Subject RIV ED - Physiology R&D Projects GA522/09/2058 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z50380511 - UEB-Q (2005-2011) DOI 10.4236/ajps.2011.23036 Annotation Transgenic tobacco plants (M51-1) constitutively over-expressing a modified gene for the proline biosynthetic enzyme delta2-pyrroline-5-carboxylate synthetase (P5CSF129A) and the corresponding wild-type plants (WT) were compared during drought or heat stress and under combination of both stresses. The proline content in M51-1 was several times higher than in WT plants. Under optimal conditions, the transpiration rate and stomatal conductance of M51-1 plants were lower than those in WT plants. The differences in net photosynthetic rate were not significant and water use efficiency and contents of chlorophyll and xanthophyll cycle pigments were higher in M51-1 than in WT plants. Drought induced by cessation of watering for 7 d resulted in decrease of all gas exchange parameters and chlorophyll content, but in an increase of the content of xanthophyll cycle pigments and degree of their de-epoxidation. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2012 Electronic address http://www.scirp.org/journal/PaperInformation.aspx?paperID=7576
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