Naslov
Physiological, Biochemical and Molecular Response of Different Winter Wheat Varieties under Drought Stress at Germination and Seedling Growth Stage

Autori
Vuković, Rosemary ; Štolfa Čamagajevac, Ivna ; Vuković, Ana ; Šunić, Katarina ; Begović, Lidija ; Mlinarić, Selma ; Sekulić, Ramona ; Sabo, Nikolina ; Španić, Valentina

Izvornik
Antioxidants (2076-3921) 11 (2022), 4; 1-26

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
antioxidative response ; dehydrins ; drought ; osmotic adjustment ; transcription factors ; wheat

Sažetak
Due to climate change in recent years, there has been an increasing water deficit during the winter wheat sowing period. This study evaluated six Croatian winter wheat varieties’ physio‐ logical, biochemical, and molecular responses under two drought stress levels at the germina‐ tion/seedling growth stage. Lipid peroxidation was mainly induced under both drought stress treat‐ ments, while the antioxidative response was variety‐specific. The most significant role in the anti‐ oxidative response had glutathione along with the ascorbate‐glutathione pathway. Under drought stress, wheat seedlings responded in proline accumulation that was correlated with the P5CS gene expression. Expression of genes encoding dehydrins (DHN5, WZY2) was highly induced under the drought stress in all varieties, while genes encoding transcription factors were differentially regu‐ lated. Expression of DREB1 was upregulated under severe drought stress in most varieties, while the expression of WRKY2 was downregulated or revealed control levels. Different mechanisms were shown to contribute to the drought tolerance in different varieties, which was mainly associ‐ ated with osmotic adjustment and dehydrins expression. Identifying different mechanisms in drought stress response would advance our understanding of the complex strategies contributing to wheat tolerance to drought in the early growth stage and could contribute to variety selection useful for developing new drought‐tolerant varieties.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Poljoprivreda (agronomija), Biotehnologija

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