Document Type : Research Paper

Authors

• Sepideh Hatami ¹
• Seyed Yahya Salehi Lisar ²
• fatemeh Rahmani ³
• latifeh poorakbar ³
• Batol Samadani ⁴

¹ Faculty member of Agriculture and Education research Organization of Iran

² Academic member in university of Tabriz

³ Faculty member of Urmia university

⁴ Faculty member of plant pathology research institute of Iran

Abstract

Winter Rye (Sereale cereal L.), belong to Gramineae ( Poaceae )family ,is native of Syria , Iran and central Asia .Drought stress is one of the most important restricted factors in crop production system in the world . Brassinosteroids (BR)improve plant water relationship in normal and stress full situation with effect on photosynthesis , Antioxidant system activity ,osmlytes accumulation and nitrogen metabolysem .

In this study ,effect of 24-Epibrassinolide on antioxidant response of 3 samples of winter Rye plant ( Lonkord Variaty (prepared from seeds and plat improvement institute), farmer usage seeds and a population of Winter Rye gathered as weed from different farms, were investigated in a completely Random design experiment with 3 replication under drought stress in 6,12 and 18 % level induced by Poly eteelen Ghlycol ( PEG 6000).

According on the results of this study Antioxidant enzymes activity under drought stress on roots of all 3 winter rye seed samples increased while on shoots of 3 seed sampeles ,CAT and APX activity increased with drought intensity rate . POD and SOD activity on roots decreased with drought intensity rate. Results of this study showed that EBR24 treatment could induced positive effects on physiological phenomena via reduce on MDA, H2O2 and electrolytes lacking production could lessen oxidative stress induced by Drought .Additionally, increasing of osmolytes contents and anti oxidants activity effect on scavenge of free radicals.

Keywords

• Winter Rye(Secal seareal L)
• drought stress
• 24-Epibrassinolide
• Antioxidant enzymes activity

Main Subjects

• Physiology