Investigating the improvement of seed germination of bread and durum wheat varieties (Triticum aestivum L.) by using salicylic acid and jasmonic acid under drought stress conditions
Nilofar Maheri
1
(
Ph.D. student in the Department of Agronomy, Ahvaz Branch, Islamic Azad University, Golestan Boulevard, Farhang Shahr Street, Postal code 61349-37333, PO Box 1915, Ahvaz, Iran.
)
tayeb sakinejad
2
(
azad university of ahwaz
)
adel modhej
3
(
Associate Professor of Agriculture Department, Shushtar Branch, Islamic Azad University, Shushtar, Iran
)
Reza Dadnia
4
(
Ph.D. of Crop Physiology and Assistant Professor in the Department of Agronomy, Ahvaz Branch, Islamic Azad University, Golestan Boulevard, Farhang Shahr Street, Postal code 61349-37333, PO Box 1915, Ahvaz, Iran
)
Seyed Keyvan Marashi
5
(
Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
)
Keywords: wheat, salicylic acid, jasmonic acid, germination, Proline,
Abstract :
An experiment was conducted to investigate the effect of salicylic acid (Sa) and jasmonic acid (Ja) pretreatment hormones on germination and seedling growth of Chamran and Karkheh wheat cultivars under drought stress (St). The cultivars seeds were primed with Ja (100 μM) and Sa (10 mM). St was applied using polyethylene glycol (PEG-6000). The data were analyzed based on a factorial experiment with three replications in a randomized complete block design. The use of Ja and Sa reduced the effects of St on wheat germination indices and the use of Ja was more effective. St reduced germination by 33.45%, while the application of Ja and Sa improved it to 22.5%. Germination seedling stress and seed length vigor index were also decreased by 23.7 and 55% under St compared to the control, but with Ja and Sa application, these indices improved to 20 and 16%, respectively. The sensitivity of Karkheh variety with less accumulation of proline was higher in St conditions and it improved to a great extent with the application of Ja and Sa. It is recommended not to use the Karkheh for the southern and western parts of Khuzestan province, where there is a high probability of St occurrence. Considering the improving effect of Ja and Sa on the germination indices of wheat seeds tested in this study, it is suggested that during additional studies, other seeds of wheat cultivars should also be tested with these hormones for use in tropical areas.
