Transactions of the Institute of Molecular Biology & Biotechnologies, ANAS, vol. 4, p. 62-66 (2020)
62
http://dx.doi.org/10.29228/edu.281
Ascorbate-glutathione cycle for scavenging H
2
O
2
in bread wheat (Triticum
aestivum L.) genotypes during drought stress and following recovery
L.M. Aydinli
Bioadaptaion Laboratory, Institute of Molecular Biology & Biotechnologies, Azerbaijan National Academy
of Sciences, 11 Izzat Nabiyev, Baku AZ 1073, Azerbaijan;
For correspondence: aydinlilale@gmail.com
Every year agriculture faces serious losses due to global climate change and drought. The best way to
deal with drought is to develop tolerant and productive varieties. Bread wheat (Triticum aestivum L.)
genotypes (tolerant Gobustan, sensitive Tale 38) were cultivated under natural conditions. The
changes in the amounts of the main components of the ascorbate glutathione cycle, ascorbic acid (AsA)
and glutathione (GSH), and activities of ascorbate peroxidase (APX) and glutathione reductase (GR)
were determined during the wax ripening stage in leaves of drought-exposed plants and on the 7th day
after rehydration. It was established that the ascorbic acid amount increased in both genotypes under
drought compared with the watered variant and then decreased after rehydration and this decrease
was more pronounced in the Gobustan genotype compared with Tale 38. Moreover, de novo synthesis
of the glutathione molecules and glutathione amount increased at the expense of the regeneration of
the oxidized form in both genotypes under drought compared with the control and after rehydration,
