TY  - JOUR
A1  - Ivanov, Ivan
A1  - Benina, Maria
A1  - Petrov, Veselin
A1  - Gechev, Tsanko S.
A1  - Toneva, Valentina
T1  - Metabolic responses of gloxinia perennis to dehydration and rehydration
T2  - COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES
N2  - Gloxinia perennis is a species from the family Gesneriaceae with little known physiology, particularly in respect to responses to dehydration. G. perennis survived water deprivation for a month and then quickly recovered upon rehydration. The slow loss of water was in contrast with the quick dehydration of other Gesnerian species - Boea hygrometrica, Ramonda serbica, and Haber lea rhodopensis. Furthermore, a significant difference between older and younger leaves of G. perennis was observed. While the relative water content in the early stages of water deprivation was reduced to 65% in the old leaves, it was not or slightly reduced in the young ones, implying a mechanism that protects specifically the younger leaves from dehydration. Water deprivation induced accumulation of gama-aminobutyric acid and sugars like sucrose and raffinose, but decreased the levels of amino acids such as glycine, leucine, and isoleucine. The levels of these amino acids recovered after rehydration and in some cases like glycine and isoleucine were even higher in rehydrated leaves compared with unstressed controls. We conclude that G.perennis can survive prolonged drought stress but its responses to dehydration are different from the resurrection species from Gesneriaceae. All this makes G. perennis a good model that can be used for comparative genomics and metabolomics of Gesneriads exposed to desiccation.
KW  - Gloxinia perennis
KW  - drought stress
KW  - metabolome analysis
Y1  - 2014
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38179
SN  - 1310-1331
VL  - 67
IS  - 12
SP  - 1657
EP  - 1662
PB  - Publ. House of the Bulgarian Acad. of Sciences
CY  - Sofia
ER  -