Evaluation of drought stress effect on seed oil yield and fatty acid composition in canola (Brassica napus L. ) cultivars

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ZALI H.; HASANLOO T.; SOFALIAN O.; ASGHARI A.

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Journal: Environmental Stresses in Crop Sciences Year:2020 | Volume:13 | Issue:3 Page(s): 735-747

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Title

Evaluation of drought stress effect on seed oil yield and fatty acid composition in canola (Brassica napus L. ) cultivars

Author(s)

ZALI H. | HASANLOO T. | SOFALIAN O. | ASGHARI A. | Issue Writer Certificate

Keywords

Drought stressQ2

Fatty acids profileQ1

Linoleic acidQ1

Oleic acidQ2

Abstract

The present experiment studied the effect of Drought stress on oil contents and fatty acid composition in canola genotypes at water stress under end-of-season drought. The experiment was conducted as split plot based on randomized complete block design with three replications. Irrigation regimes were considered as main plots and cultivars as subplots. Six winter canola cultivars including SLM046, Tassilo, Karun, Adriana, Cooper and Lilian were evaluated under irrigated and no irrigated. The irrigation regimes included: well-watered (irrigation during full season), water deficit at flowering stage and water deficit at siliquing stage. The proportions (%) of fats (monounsaturated: polyunsaturated: saturated) in this study were approximately 68. 0: 26. 0: 6. 0. The results of analysis of variance indicated that Drought stress at flowering and siliquing stages significantly affected the amount of Myristic, Palmitic, Palmitolic, Stearic, Oleic acid/fa?page=1&sort=1&ftyp=all&fgrp=all&fyrs=all" target="_blank">LinOleic acids. Oleic acid had significantly and negatively correlated with Palmitic acid, Oleic acid/fa?page=1&sort=1&ftyp=all&fgrp=all&fyrs=all" target="_blank">LinOleic acid and Linolenic acid, but it had a significant and positive correlation with oil content. Under well-watered conditions, the values of Palmitic, Myristic, Oleic acid/fa?page=1&sort=1&ftyp=all&fgrp=all&fyrs=all" target="_blank">LinOleic acids were significantly higher than Drought stress at flowering (excepted for Oleic acid/fa?page=1&sort=1&ftyp=all&fgrp=all&fyrs=all" target="_blank">LinOleic acid) and siliquing stages. In conclusion, the changes in fatty acids composition in the present study were probably due to the combined effect of water deficits and high temperatures during the seed-filling period with the end-of-season drought treatment (flowering and siliquing stages). This study showed that drought decreases slightly seed oil percentage, alters fatty acid composition and affects fatty acid composition stability.

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APA: Copy

ZALI, H., HASANLOO, T., SOFALIAN, O., & ASGHARI, A.. (2020). Evaluation of drought stress effect on seed oil yield and fatty acid composition in canola (Brassica napus L. ) cultivars. ENVIRONMENTAL STRESSES IN CROP SCIENCES, 13(3 ), 735-747. SID. https://sid.ir/paper/408963/en

Vancouver: Copy

ZALI H., HASANLOO T., SOFALIAN O., ASGHARI A.. Evaluation of drought stress effect on seed oil yield and fatty acid composition in canola (Brassica napus L. ) cultivars. ENVIRONMENTAL STRESSES IN CROP SCIENCES[Internet]. 2020;13(3 ):735-747. Available from: https://sid.ir/paper/408963/en

IEEE: Copy

H. ZALI, T. HASANLOO, O. SOFALIAN, and A. ASGHARI, “Evaluation of drought stress effect on seed oil yield and fatty acid composition in canola (Brassica napus L. ) cultivars,” ENVIRONMENTAL STRESSES IN CROP SCIENCES, vol. 13, no. 3 , pp. 735–747, 2020, [Online]. Available: https://sid.ir/paper/408963/en

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