نوع مقاله : مقالات پژوهشی
نویسندگان
1 دانش آموخته دانشگاه تربت حیدریه
2 گروه تولیدات گیاهی، دانشگاه تربت حیدریه
3 عضو هیات علمی دانشگاه تربت حیدریه
چکیده
به‌منظور بررسی اثرات محلول‌پاشی عصاره جلبک دریایی بر روی نشاهای گل‌گاوزبان در شرایط تنش شوری، آزمایشی به صورت فاکتوریل با دو فاکتور جلبک دریایی و تنش شوری با نمک کلرید سدیم، در قالب طرح کاملا تصادفی در گلخانه انجام شد. در این آزمایش تیمارها شامل غلظت 1500 ppm از عصاره جلبک دریایی و سه سطح شوری (EC=1.6, 4, 8) بود. یک هفته بعد از اولین محلول‌پاشی عصاره‌های جلبک دریایی، اعمال تنش شوری آغاز گردید. به‌منظور جلوگیری از ایجاد شوک در گیاهان، تیمار شوری به‌تدریج و در سه مرحله انجام شد. نتایج تجزیه واریانس نشان داد اثرات ساده تیمارهای شوری و جلبک دریایی و همچنین اثرات متقابل شوری در جلبک دریایی بر وزن تر اندام هوایی، وزن تر ریشه، طول ریشه و وزن خشک کل بوته گل‌گاوزبان معنی‌دار بود. عصاره جلبک دریایی سبب افزایش میزان پرولین و پتاسیم در برگ گیاه گردید و از این طریق سبب کاهش اثرات مخرب تنش شوری برای گیاه گل گاوزبان شد. علاوه بر این محلول پاشی گیاه گل گاوزبان با استفاده از عصاره جلبک دریایی سبب افزایش میزان کلروفیل در گیاه گردید و از این طریق با افزایش میزان فتوسنتز در گیاه به رشد بهتر گیاه در شرایط تنش شوری کمک کرد. استفاده از عصاره جلبک سبب افزایش میزان قند محلول تحت شرایط تنش شوری گردید. به طوری که در غلطت های 6/1، 4 و 8 از تنش شوری میزان قند محلول به ترتیب 80%، 33% و 33% درصد افزایش یافت. استفاده از عصاره جلبک دریایی سبب کاهش 11 و 15 درصدی میزان سدیم در غلظت‌های 4 و 8 شوری شد. همچنین جلبک دریایی جذب پتاسیم را 33 و 24 درصد در غلطت‌ها شوری افزایش داد. باتوجه‌به نتایج به‌دست‌آمده می‌توان نتیجه گرفت کاربرد جلبک دریایی می‌تواند اثرات منفی تنش شوری را در نشاء گل‌گاوزبان ایرانی کاهش دهد همچنین به دلیل قیمت پایین و دردسترس بودن به عنوان یک کود زیستی مناسب برای حفط رشد گیاه در شرایط تنش شوری استفاده گردد.
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
The effect of foliar application of seaweed extract on morphological and physiological traits of Echium amoenum seedlings under salinity stress
نویسندگان [English]
- Behrooz Rahimkhani 1
- Mahboobeh Naseri 2
- Ahmad Ahmadian 3
- Masoud Alipanah 3
1 university of torbat heydarieh
2 university of TorbathHeydarieh
3 University of Torbat Heydarieh
چکیده [English]
Introduction:
From the past, medicinal plants have been used as one of the most important resources for medicinal purposes. Even now, the use of medicinal plants is expanding in many developed. Salinity stress is one of the most important influencing factors in reducing plant growth. Salinity stress limits plant growth by reducing metabolic and physiological activities in the plant. One of the consequences of salinity stress in the plant is the production of abscisic acid in the plant. One of the methods that have been tested in recent years to reduce the effects of salinity stress in plants is the use of seaweed and its extract. According to the studies conducted in some plants, seaweed extract can cause the growth and expansion of the roots and help to increase the absorption of water and minerals through the roots. Also, based on the research conducted on some plants, the use of seaweed increases the amount of chlorophyll in the plant and accelerates the time of flowering and fruit formation in the plant. Echium amoenum is a perennial plant belonging to the family Borage is a valuable plant in terms of its medicinal properties is considered. in general environmental factors have a significant effect on flower production in these plants. Therefore, for the successful cultivation of medicinal plants, including in general environmental factors have a significant effect on flower production in these plants. Therefore, for the successful cultivation of medicinal plants, including Echium amoenum, providing optimal environmental conditions is a priority, providing optimal environmental conditions is a priority.
Ascophyllum nodosum seaweed extract contains significant amounts of high-use mineral elements such as nitrogen, potassium, calcium, magnesium, and low-use mineral elements such as iron, copper, and manganese. Therefore, according to the current results, in this study, the effect of foliar spraying of algae extract was investigated. The morphological characteristics of Echium amoenum seedling under salt stress were investigated
Materials and Methods
In order to investigate the effects of foliar spraying of seaweed extract on borage flower seedlings under salinity stress conditions, a factorial experiment was conducted with two factors of seaweed and salinity stress with sodium chloride salt, in the form of a completely randomized design in the greenhouse. The seeds were purchased from Pakan Seed Company of Isfahan and soaked in normal water for 24 hours, and then they were transferred into small pots containing three parts of peat moss and one part of perlite. One week after transferring the seedlings to the main pots, foliar spraying with seaweed extract was done. Foliar-spraying was repeated once every two weeks and in total the seedlings were sprayed three times with seaweed extract. In this experiment, a concentration of 1500 ppm of seaweed extract and three levels of salinity (EC=1.6, 4, 8) were used.
The seaweed extract used in this experiment belonged to Akadin Company. The type of seaweed from which the extract was prepared was Ascophyllum nodosum and it is a type of brown algae. One week after the first foliar application of seaweed extracts, the application of salinity stress began. In order to prevent shock in plants, salinity treatment was done gradually and in three stages. In order to prevent salt accumulation, washing with ordinary water was done once every two weeks.
Results and Discussion
The results showed that the use of seaweed extract can significantly protect plant growth under salinity stress. Seaweed extract increased the amount of proline and potassium in the leaves of the plant and thereby reduced the harmful effects of salinity stress on the borage plant. In addition, foliar spraying of borage plant with the use of seaweed extract increased the amount of chlorophyll in the plant, and in this way, by increasing the amount of photosynthesis in the plant; it helped the plant to grow better under salt stress conditions. The results of this research showed that the use of seaweed extract helps the plant to maintain its conditions against salt stress by increasing the amount of proline and absorbing potassium in the tissue. In addition, foliar spraying with seaweed extract preserves the structure of chlorophyll in the plant under salinity stress, and in this way, by increasing the photosynthetic efficiency, it helps the plant grow better under salt stress. According to the obtained results, it can be concluded that the use of seaweed can reduce the negative effects of salinity stress in the seedlings of Iranian borage. In addition, due to its low price and availability, it can be used as a suitable bio-fertilizer to protect plant growth under salinity stress conditions.
کلیدواژه‌ها [English]
- electrolyte leakage
- salt stress
- sodium
- carotenoids
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