بررسی تأثیر براسینولید بر فعالیت آنزیمهای آنتیاکسیدانی در آفتابگردان(Helianthusannuus L.) (رقم اسکار) میتواند به درک بهتری از سازوکارهای دفاعی گیاه در برابر تنش خشکی کمک کند و به معرفی راهکارهای لازم برای افزایش تابآوری در شرایط کمآبیاری منجر شود. بنابراین آزمایشی بهصورت اسپلیت پلات در قالب طرح بلوکهای کامل تصادفی با سه تکرار انجام گرفت. عامل اصلی شامل رژیم آبیاری در سه سطح (بدون تنش (100 درصد آبیاری کامل(، تنش متوسط (75 درصد آبیاری کامل( و تنش شدید (50 درصد آبیاری کامل)) با توجه به تشتک تبخیر کلاس A و عامل فرعی شامل محلولپاشی براسینولید در سه سطح) صفر (آب مقطر)، 0.1 و 0.5 میلیگرم بر لیتر( بود. براساس مقایسه میانگین، تنش شدید سبب کاهش محتوای نسبی آب برگ (18.79 درصد) و افزایش آنزیمهای آنتیاکسیدانی شد. در این سطح تنش، شاخص سطح برگ، عملکرد دانه و عملکرد روغن بهترتیب با کاهش 57.48، 61.56 و 70.01 درصد نسبت به آبیاری کامل مواجه شدند. از سوی دیگر، اثر ساده محلولپاشی 0.5 میلیگرم بر لیتر براسینولید موجب افزایش 18.58 و 36.40 درصدی کاتالاز و پروکسیداز گردید. همچنین بیشترین میزان شاخص سطح برگ از تیمار آبیاری کامل + محلولپاشی 0.5 میلیگرم بر لیتر براسینولید به دست آمد. عملکرد دانه و عملکرد روغن نیز تحت بالاترین سطح محلولپاشی براسینولید در شرایط تنش شدید با افزایش 83.57 و 66.66 درصدی نسبت به تیمار عدم محلولپاشی + تنش شدید روبهرو بود. نتایج پژوهش نشان داد که محلولپاشی 0.5 میلیگرم بر لیتر براسینولید جهت بهبود عملکرد آفتابگردان تحت شرایط آبیاری مطلوب و تنش خشکی مناسب خواهد بود.
Abaszadeh, B., Fanaee, S., & Bakhshi, D. (2024). Foliar application of Silybum marianum Gaertn. with plant growth regulators under different soil moisture conditions. Iranian Journal of Medicinal and Aromatic Plants Research, 40(3), 562-580. (in Persian with English abstract). https://doi.org/10.22092/ijmapr.2024.364529.3405
Ahmad, P., Jamsheed, S., Hameed, A., Rasool, S., Sharma, I., Azooz, M. M., & Hasanuzzaman, M. (2014). Drought stress induced oxidative damage and antioxidants in plants. In Oxidative damage to plants(pp. 345-367). Academic Press. https://doi.org/10.1016/B978-0-12-799963-0.00011-3
AL Bakri, A. A. A., & AL-Zubaidy, S. A. A. H. (2023, September). Effect of irrigation periods and brassinolide growth regulator on the growth of maize (Zeamays). In AIP Conference Proceedings, 2845(1), 020010. AIP Publishing LLC. https://doi.org/10.1063/5.0157396
Ansarifard, I., Mostafavi, K., Khosroshahli, M., Bihamta, M., & Ramshini, H. (2020). A study on genotype–environment interaction based on GGE biplot graphical method in sunflower genotypes (Helianthus annuus). Food Science & Nutrition, 8(7), 3327-3334. https://doi.org/10.1002/fsn3.1610
Arab, R., Yadavi, A., Balouchi, H., & Alahdadii, H. (2023). The effects of iron and zinc foliar application on nutrients absorption improvement, seed yield and water use efficiency of sunflower under drought stress conditions. Journal of Crops Improvement, 25(4), 977-993. (in Persian with English abstract). https://doi.org/10.22059/jci.2023.352118.2767
Ashraf, F., & Siddiqi, E. H. (2024). Mitigation of drought-induced stress in sunflower (Helianthusannuus) via foliar application of Jasmonic acid through the augmentation of growth, physiological, and biochemical attributes. BioMed Central Plant Biology, 24(1), 592. https://doi.org/10.1186/s12870-024-05273-4
Balestrini, R., Chitarra, W., Antoniou, C., Ruocco, M., & Fotopoulos, V. (2018). Improvement of plant performance under water deficit with the employment of biological and chemical priming agents. The Journal of Agricultural Science, 156(5), 680-688. https://doi.org/10.1017/S0021859618000126
Bartwal, A., & Arora, S. (2020). Brassinosteroids: Molecules with myriad roles. In A. Arora & A. Ramawat (Eds.), Co-evolution of Secondary Metabolites(pp. 869–895). Cham, Switzerland: Springer International Publishing. https://doi.org/10.1007/978-3-319-96397-6_18
Beauchamp, C., & Fridovich, I. (1971). Superoxide dismutase: Improved assays and applicable to acryl amide gels. Annual Review of Biochemistry, 44, 276-287. https://doi.org/10.1016/0003-2697(71)90370-8
Bogati, K., & Walczak, M. (2022). The impact of drought stress on soil microbial community, enzyme activities and plants. Agronomy, 12(1), 189. https://doi.org/10.3390/agronomy12010189
Chaghakaboodi, Z., Mousavi, S. H., & Kakaei, M. (2024). The effect of 24-epibrasinolide (24-EBL) on physiological and biochemical pathways of lettuce (Lactuca Sativa) under drought stress conditions. Crop Biotechnology, 14(1), 15-28. (in Persian with English abstract). https://doi.org/10.30473/cb.2024.70956.1964
Chen, X., Hu, X., Jiang, J., & Wang, X. (2024). Functions and mechanisms of brassinosteroids in regulating crop agronomic traits. Plant and Cell Physiology, 65(10), 1568-1580. https://doi.org/10.1093/pcp/pcae044
El-Beltagi, H. S., & El-Metwally, M. M. (2017). Alleviation of drought stress effects on sunflower (Helianthusannuus) by exogenous application of brassinosteroids. Plant Growth Regulation, 83(2), 267-279.
El-Beltagi, H. S., El-Sherif, A. M., & El-Metwally, M. M. (2019). Role of brassinosteroids in improving yield and oil quality of sunflower (Helianthus annuus) under salinity stress. Plant Growth Regulation, 88(2), 215-226.
Farooq, M., Wahid, A., Kobayashi, N., Fujita, D., & Basra, S. M. A. (2009). Plant drought stress: Effects, mechanisms and management. Agronomy for Sustainable Development, 29(1), 185-212. https://doi.org/10.1007/978-90-481-2666-8_12
Gao, S., Wang, Y., Yu, S., Huang, Y., Liu, H., Chen, W., & He, X. (2020). Effects of drought stress on growth, physiology and secondary metabolites of two Adonis species in Northeast China. Scientia Horticulturae, 259, 108-795. https://doi.org/10.1016/j.scienta.2019.108795
Gao, Y., Ma, X., Zhang, Z., Wang, X., & Wang, Y. (2024). Brassinolides signaling pathway: Tandem response to plant hormones and regulation under various abiotic stresses. Horticulture Advances, 2(1), 27. https://doi.org/10.1007/s44281-024-00050-7
García-López, J., Lorite, I. J., García-Ruiz, R., & Domínguez, J. (2014). Evaluation of three simulation approaches for assessing yield of rainfed sunflower in a Mediterranean environment for climate change impact modelling. Climatic Change, 124(1), 147-162. https://doi.org/10.1007/s10584-014-1067-6
Ghasemi, M., Jahanbin, S., Latifmanesh, H., Farajee, H., & Mirshekari, A. (2021). Effect of brassinolide foliar application on some physiological and agronomic characteristics of sunflower (Helianthusannuus) under drought stress conditions. Journal of Crop Production, 14(1), 31-48. (in Persian with English abstract). https://doi.org/10.22069/ejcp.2021.18084.2339
Ghassemi-Golezani, K., Ghassemi, S., & Zehtab-Salmasi, S. (2018). Changes in essential oil-content and composition of ajowan (Carum copticum) seeds in response to growth regulators under water stress. Scientia Horticulturae, 231, 219-226. https://doi.org/10.1016/j.scienta.2017.12.011
Gholizadeh, A., Ghaffari, M., Payghamzadeh, K., & Kia, S. (2021). Study on relationships between yield and other agronomic traitsand identification of the superior hybridsin sunflower (Helianthus annuus). Journal of Crop Breeding, 13(37), 171-184. (in Persian with English abstract). http://doi.org/10.52547/jcb.13.37.171
Hafeez, M. B., Zahra, N., Zahra, K., Raza, A., Batool, A., Shaukat, K., & Khan, S. (2021). Brassinosteroids: Molecular and physiological responses in plant growth and abiotic stresses. Plant Stress, 2, 100029. https://doi.org/10.1016/j.stress.2021.100029
Hajiri, K., & Pazoki, A. (2023). Investigating the role of brassinolide in tolerance to lead toxicity on growth and physiological traits of pinto beans. Journal of Crop Production, 16(3), 17-32. (in Persian with English abstract). https://doi.org/10.22069/ejcp.2024.20577.2532
Hamed, M. A., & Abdullah, B. H. (2022). The effect of brassınolıde on the yıeld components, seed and oil yıelds of some sunflower cultıvars. Journal of Plant Production, 13(6), 215-218. https://doi.org/10.21608/JPP.2022.245281
Hassan, A. M., & Mohamed, H. E. (2019). L-arginine pretreatment enhances drought resistance of sunflower (Helianthus annuus) plants by increase in polyamines content. Journal of Plant Growth Regulation, 38(2), 600-605. https://doi.org/10.1007/s00344-018-9873-0
Hassanuzzaman, M., Nahar, K., Alam, M. M., Ahmad, S., & Fujita, M. (2015). Exogenous application of phytoprotectants in legumes against environmental stress. In Legumes under environmental stress: Yield, improvement and adaptations. 161–197. Wiley Blackwell. https://doi.org/10.1002/9781118917091.ch11
Hu, W., Lu, Z., Meng, F., Li, X., Cong, R., Ren, T., & Lu, J. (2020). The reduction in leaf area precedes that in photosynthesis under potassium deficiency: the importance of leaf anatomy. New Phytologist, 227(6), 1749-1763. https://doi.org/10.1111/nph.16644
Huchzermeyer, B., Menghani, E., Khardia, P., & Shilu, A. (2022). Metabolic pathway of natural antioxidants, antioxidant enzymes and ROS providence. Antioxidants, 11(4), 761. https://doi.org/10.3390/antiox11040761
Jaleh, D. (2017). Metabolic adjustments, assimilate partitioning, and alterations in source-sink relations in drought-stressed plants. In Photoassimilate distribution in plants and crops: Source-sink relationships. pp. 407–420.
Johnson, C. M., & Ulrich, A. (1959). Antalytical methods for use in plant analysis. California Agricultural Experiment Station, Bulletin, 766, 52-78.
Karami Borzabad, R., Peykarestan, B., &Baghbani-Arani, A. (2022). The effect of stopping irrigation and using superabsorbent on the morphological, quantitative and qualitative characteristics of sunflower grains. Journal of Plant Ecophysiology, 47(13), 32-44. (in Persian with English abstract)
Köppen, W. (1936). Das Geographische System der Klimate. In W. Koppen, & R. Geiger, eds. Handbuch der Klimatologie, Vol. 1, Part C. Gebruder Borntraeger, Berlin.
Liu, H., Song, S., Zhang, H., Li, Y., Niu, L., Zhang, J., & Wang, W. (2022). Signaling transduction of ABA, ROS, and Ca2+ in plant stomatal closure in response to drought. International Journal of Molecular Sciences, 23(23), 14824. https://doi.org/10.3390/ijms232314824
MacAdam, J. W., Nelson, C. J., & Sharp, R. E. (1992). Peroxidase activity in the leaf elongation zone of tall fescue: I. Spatial distribution of ionically bound peroxidase activity in genotypes differing in length of the elongation zone. Plant Physiology, 99(3), 872-878. https://doi.org/10.1104/pp.99.3.872
Motiei, M. M., Sirousmehr, A. P., Khammari, I., & Naderi, A. (2023). Investigation of the effect of different irrigation regimes on seed yield, antioxidant enzyme activity and some quantitative traits of sunflower cultivars. Crop Physiology Journal, 14(55), 5-20. (in Persian with English abstract).
Nasser, S. E. D. M., & Sarhan, I. A. (2023, July). Effect of spraying with brassinolide on yield and its components of sesame cultivars. In IOP Conference Series: Earth and Environmental Science(Vol. 1213, No. 1, p. 012028). IOP Publishing. https://doi.org/10.1088/1755-1315/1213/1/012028
Omidi Nasab, D., Meskarbashee, M., & Rahnama Ghahfarokhi, A. (2024). The effect of deficit irrigation on grain yield and some physiological indicators of sunflower (Helianthus annus) cultivars. Iranian Journal of Field Crops Research, 22(1), 71-88. (in Persian with English abstract). https://doi.org/10.22067/jcesc.2023.83198.1258
Omidinasab, D., Meskarbashee, M., & Rahnama Ghahfarokhi, A. (2023). Effect of deficit irrigation on grain yield and quality characteristics of oil content of sunflower (Helianthus annus). Iranian Journal of Field Crop Science,54(3), 97-108. (in Persian with English abstract). https://doi.org/10.22059/ijfcs.2023.353827.654972
Planas-Riverola, A., Gupta, A., Betegón-Putze, I., Bosch, N., Ibañes, M., & Caño-Delgado, A. I. (2019). Brassinosteroid signaling in plant development and adaptation to stress. Development, 146(5), dev151894. https://doi.org/10.1242/dev.151894
Moradi-Ghahderijani, M., Jafarian, S., & Keshavarz, H. (2017). Alleviation of water stress effects and improved oil yield in sunflower by application of soil and foliar amendments. Rhizosphere, 4, 54-61. https://doi.org/10.1016/j.rhisph.2017.06.002
Ravi, V., & Indira, P. (1999). Crop physiology of sweetpotato. Journal of American Society for Horticultural Science, 23, 277–338. https://doi.org/10.1002/9780470650752.ch6
Sheikh Mamo, B., Rahnama, A., & Hassibi, P. (2023). Evaluation of biochemical traits and seed yield of sunflower (Helianthus annuss) cultivars in response to terminal heat stress in Ahvaz, Iran. Iranian Journal of Crop Sciences, 25(3), 275-293. (in Persian with English abstract).
Sirohi, G., & Kapoor, M. (2020). Brassinosteroids in lowering abiotic stress-mediated damages. In M. Hasanuzzaman, K. Nahar, & M. Fujita (Eds.). Protective Chemical Agents in the Amelioration of Plant Abiotic Stress: Biochemical and Molecular Perspectives. pp. 318–326. Wiley. 318-326. https://doi.org/10.1002/9781119552154.ch15
Talaat, N. B., &Shawky, B. T. (2016). Dual application of 24-epibrassinolide and spermine confers drought stress tolerance in maize (Zea mays) by modulating polyamine and protein metabolism. Journal of Plant Growth Regulation, 35(2), 518-533. https://doi.org/10.1007/s00344-015-9557-y
Tiwari, R. K., Lal, M. K., Kumar, R., Chourasia, K. N., Naga, K. C., Kumar, D., & Zinta, G. (2021). Mechanistic insights on melatonin‐mediated drought stress mitigation in plants. Physiologia Plantarum, 172(2), 1212-1226. https://doi.org/10.1111/ppl.13307
Vahdi, N., & GHolinejad, E. (2015). Evaluation of drought tolerance of some soybean cultivars. Journal of Water Research in Agriculture, 29(1), 1-9. (in Persian with English abstract).
Vardhini, B. V., & Anjum, N. A. (2015). Brassinosteroids make plant life easier under abiotic stresses mainly by modulating major components of antioxidant defense system. Frontiers in Environmental Science, 2, 67. https://doi.org/3389/fenvs.2014.00067
Woodson, J. D. (2022). Control of chloroplast degradation and cell death in response to stress. Trends in Biochemical Sciences, 47(10), 851-864. https://doi.org/10.1016/j.tibs.2022.03.010
Yaqoob, U., Jan, N., Raman, P. V., Siddique, K. H., & John, R. (2022). Crosstalk between brassinosteroid signaling, ROS signaling and phenylpropanoid pathway during abiotic stress in plants: Does it exist? Plant Stress, 4, 100075. https://doi.org/10.1016/j.stress.2022.100075
Yazdandoost Hamedani, M., Ghobadi, M., ghobadi, M. E., Jalali Honarmand, S., & Saeidi, M. (2022). The Effect of foliar application of some chemical compounds on antioxidant enzymes activity and chlorophyll fluorescence of sunflower in different irrigation conditions. Journal of Crops Improvement, 24(1), 1-14. (in Persian with English abstract). https://doi.org/10.22059/jci.2021.307719.2432
Zhou, R., Yu, X., Ottosen, C. O., Rosenqvist, E., Zhao, L., Wang, Y., & Wu, Z. (2017). Drought stress had a predominant effect over heat stress on three tomato cultivars subjected to combined stress. BMC Plant Biology, 17, 24-33. https://doi.org/10.1186/s12870-017-0974-x