Djilianov D.L., Dobrev P.I., Moyankova D.P., Vaňková R., Georgieva D.Ts., Gajdošová S., Motyka V.
JOURNAL OF PLANT GROWTH REGULATION
32:
564-574,
2013
Klíčová slova:
Abscisic acid, auxin, cytokinin, desiccation tolerance, Haberlea rhodopensis, jasmonic acid, phytohormones, resurrection plant, salicylic acid
Abstrakt:
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.
Fulltext: kontaktujte autory z ÚEB
Autoři z ÚEB: Petre I. Dobrev,
Václav Motyka,
Radomíra Vanková
Čeština
English