Effects of 6-Benzylaminopurine and Salinity Stress on Flowering and Biochemical Characteristics of Winter Jasmine (Jasminum nudiflorum L.)
محورهای موضوعی : مجله گیاهان زینتی
Masoume Fazeli
1
(Horticultural Department, Islamic Azad University,Isfahan (Khorasgan) Branch, Isfahan, Iran.)
Davood Naderi
2
(Young Researchers and Elite Clubs, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran.)
کلید واژه: superoxide dismutase, BA, Chlorophyll content, Plant hormones, Tolerance of stress,
چکیده مقاله :
The purpose of this study was to evaluate the effects of different levels of salinity stress and sprayed of the 6-benzylaminopurine (benzyl adenine) on morphological and biochemical characteristics of winter jasmine. Therefore, an experiment was conducted in 2016-2017 growing seasons in research center of greenhouse production of Islamic Azad University, Isfahan (Khorasgan) Branch. The experiment was carried by using a factorial based on completely randomized design with 4 levels of salinity stress (2, 4, 6 and 8 dS m-1) as the first factor and different levels of benzyl adenine (control (non-application), 25 and 50 mg l-1) as a second factor was performed in 3 replications (total of 36 plots). The traits such as fresh and dry weight of flower, flower number, content of the chlorophyll a, b, total, carotenoids, and superoxide dismutase (SOD) enzyme of winter jasmine plant were studied. The results showed that salinity levels and benzyl adenine foliar application have a significant effect on all of traits. The results showed that the activity of SOD was significantly higher in application of 8 dS m-1 salinity than the 2 dS m-1 treatment, and the highest enzymatic activity were recorded at 8 dS m-1 treatment. On the other hand, in investigating the effects of foliar application of Benzyl adenine treatment, it was observed that this factor had positive effects on all of the above traits and their effects were concentration-dependent. It can be concluded that although salinity stress had a negative effect on winter jasmine, benzyl adenine treatment has minimized the negative effects of salinity stress.
هدف از این مطالعه بررسی اثرات سطوح مختلف تنش شوری و محلول­پاشی 6-بنزیل آمینوپورین (بنزیل آدنین) بر ویژگی‌های مورفولوژیک و بیوشیمیایی یاسمن زمستانه بود. بنابراین آزمایشی در سال‌های 96-1395 در مرکز تحقیقات گلخانه‌ای دانشگاه آزاد اسلامی واحد اصفهان (خوراسگان) انجام شد. این آزمایش بصورت فاکتوریل بر اساس طرح کاملا تصادفی با چهار سطح تنش شوری (2، 4، 6 و 8 دسی‌زیمنس بر متر) به‌عنوان عامل اول و سطوح مختلف بنزیل‌آدنین (کنترل (عدم کاربرد)، 25 و 50 میلی‌گرم در لیتر) به عنوان عامل دوم در 3 تکرار (مجموع 36 واحد آزمایش) انجام شد. صفاتی مانند وزن تر و خشک وزن گل، تعداد گل، درصد کلروفیل a، b، کل، کاروتنوئید و آنزیم سوپراکسید دیسموتاز گیاه یاسمن زمستانه مورد مطالعه قرار گرفت. نتایج نشان داد که سطوح شوری و بنزیل‌آدنین تاثیر معنی‌داری بر تمام صفات داشت. نتایج نشان داد که فعالیت آنزیم سوپر اکسید دیسموتاز در شوری هشت دسی‌زیمنس بر متر به‌طور معنی‌داری از فعالیت این آنزیم در تیمار دو دسی‌زیمنس بر متر بیشتر بود و بالاترین فعالیت آن در تیمار هشت دسی‌زیمنس بر متر مشاهده شد. از سوی دیگر، در بررسی اثرات استفاده از بنزیل‌آدنین، مشاهده شد که این تیمار اثرات مثبتی بر تمام صفات مورد بررسی دارد و اثرات آن­ها وابسته به غلظت است. در پایان می‌توان گفت، با وجودی که تنش شوری اثر منفی بر یاسمن زمستانه داشت، تیمار بنزیل‌آدنین اثرات منفی تنش شوری را کاهش داده است.
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