Dynamics of Endogenous Phytohormones during Desiccation and Recovery of the Resurrection Plant Species Haberlea rhodopensis

0399223 - ÚEB 2014 RIV US eng J - Článek v odborném periodiku
Djilianov, D.L. - Dobrev, Petre - Moyankova, D.P. - Vaňková, Radomíra - Georgieva, D.T. - Gajdošová, Silvia - Motyka, Václav
Dynamics of Endogenous Phytohormones during Desiccation and Recovery of the Resurrection Plant Species Haberlea rhodopensis.
Journal of Plant Growth Regulation. Roč. 32, č. 3 (2013), s. 564-574. ISSN 0721-7595. E-ISSN 1435-8107
Grant CEP: GA ČR(CZ) GAP506/11/0774; GA ČR GA522/09/2058; GA ČR GA206/09/2062
Výzkumný záměr: CEZ:AV0Z50380511
Klíčová slova: Abscisic acid * Auxin * Desiccation tolerance * Cytokinin
Kód oboru RIV: ED - Fyziologie
Impakt faktor: 2.058, rok: 2013

Drought is one of the most significant threats to world agriculture and hampers the supply of food and energy. The mechanisms of drought responses can be studied using resurrection plants that are able to survive extreme dehydration. As plant hormones function in an intensive cross-talk, playing important regulatory roles in the perception and response to unfavorable environments, the dynamics of phytohormones was followed in the resurrection plant Haberlea rhodopensis Friv. during desiccation and subsequent recovery. Analysis of both leaves and roots revealed that jasmonic acid, along with and even earlier than abscisic acid, serves as a signal triggering the response of the resurrection plants to desiccation. The steady high levels of salicylic acid could be considered an integral part of the specific set of parameters that prime H. rhodopensis desiccation tolerance. The dynamic changes of cytokinins and auxins suggest that these hormones actively participate in the dehydration response and development of desiccation tolerance in the resurrection plants. Our data contribute to the elucidation of a global complex picture of the resurrection plant's ability to withstand desiccation, which might be successfully utilized in crop improvement.
Trvalý link: http://hdl.handle.net/11104/0226635