یافته های نوین در علوم زیستی

تأثیر محلول‌پاشی عصاره جلبک قهوه‌ای Ascophyllum nodosum بر صفات مورفوفیزیولوژیک لوبیا ) (Phaseolus vulgaris تحت تنش کم‌آبی

نویسندگان

محسن علیزاده 1
نظام آرمند 2
مریم رحیمی 1
شکوفه حاجی‌هاشمی 2

1 گروه زیست شناسی، دانشکده علوم، دانشگاه ملایر، ملایر، ایران

2 گروه زیست شناسی، دانشکده علوم پایه، دانشگاه صنعتی خاتم الانبیاء بهبهان، خوزستان، ایران

https://doi.org/10.52547/nbr.9.1.61
چکیده
عصاره جلبک‌­های دریایی به سبب دارا بودن مواد مغذی فراوان، ظرفیت نگه­داری آب بالا، تنظیم کننده­‌های رشد گیاهی و وجود ریزجانداران مفید می‌تواند خصوصیات فیزیکوشیمیایی خاک را بهبود و تأثیر مطلوب بر رشد و نمو گیاهان داشته باشد. به این منظور آزمایشی با هدف بررسی تأثیر عصاره جلبک قهوه‌ای آسکوفیلوم نودوسوم (Ascophyllum nodosum) بر شاخص­های مورفوفیزیولوژیکی گیاه لوبیا تحت تنش کمبود آب به صورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار به اجراء درآمد. تیمارهای آزمایش شامل 4 سطح محلول پاشی عصاره جلبک دریایی (0، 2/0، 4/0 و 6/0 درصد حجمی) و 3 سطح تنش کم­آبی شامل بدون تنش، تنش ملایم و تنش شدید (به ترتیب آبیاری در سطح 75، 50 و 25 درصد ظرفیت زراعی) بود. نتایج نشان داد که اثرات متقابل تنش و عصاره جلبکی بر صفات مورد بررسی معنی­‌دار نبود اما عصاره جلبک دریایی آسکوفیلوم به تنهایی موجب افزایش معنی­دار سطح و تعداد برگ، طول برگ، سطح و طول ریشه، وزن خشک ریشه، محتوای کلروفیل a، b و محتوای کلروفیل کل شد. کاربرد عصاره جلبکی در سطوح 2/0 و 4/0 درصد باعث افزایش معنی‌دار پارامترهای اندازه­‌گیری شده در مقایسه با شاهد شد. در بررسی اثرات تنش کم­آبی مشاهده شد که با افزایش شدت تنش از 75 درصد ظرفیت زراعی به 25 درصد ظرفیت زراعی تمامی صفات مورد بررسی کاهش معنی‌­داری داشت. نتایج این پژوهش نشان داد که محلول پاشی عصاره جلبک دریایی موجب افزایش معنی­دار برخی خصوصیات ریخت شناختی و رنگدانه‌­های فتوسنتزی شد, درحالیکه تنش کم‌آبی سبب کاهش معنی‌‌دار شاخص‌های مورد بررسی شد.


کلیدواژه‌ها

تنش کم‌­آبی
رنگدانه‌های فتوسنتزی
صفات رشدی
لوبیا

عنوان مقاله English

Effect of foliar application of seaweed Ascophyllum nodosum extract on morpho-physiological characteristics of bean (Phaseolus vulgaris) under water stress

نویسندگان English

Mohsen Alizadeh 1
Nezam Armand 2
Maryam Rahimi 1
Shokoufeh Haji Hashemi 2
1 Department of Biology, Faculty of Sciences, Malayer University, Malayer, Iran
2 Department of Biology, Faculty of Sciences, Behbahan Khatam Alanbia University of Technology, Khuzestan, Iran
چکیده English

Seaweed extract can improve the physicochemical properties of the soil and has a favorable effect on the plant growth and development due to having high nutrient content, high water holding capacity, plant growth regulators and beneficial microorganisms. The aim of this experiment was to investigate the effect of Ascophyllum nodosum extract, a brown alga, on the morphophysiological characteristics of bean plant (Phaseolus vulgaris) under water stress. The experiment was performed in a Completely Randomized Factorial Design with three replications. Experimental treatments included 4 concentrations of foliar application of seaweed extract (0, 0.2, 0.4 and 0.6%) and 3 levels of water stress including no stress, mild stress and severe stress (irrigation at 75, 50 and 25% of field capacity, respectively). The results showed that the interaction effects of stress and algal extract on the evaluated traits were not significant. However, the seaweed extract significantly increased the leaf area, number of the leaves, leaf length, surface and length of the roots, root dry weight, the content of chlorophyll a and b and the total chlorophyll content. Application of algal extract at levels of 0.2 and 0.4% caused a significant increase in the evaluated parameters as compared with the control plants. The evaluation of water scarcity stress effects showed a significant reduction in the all studied characteristics in accordance with increasing water stress level from 75% to 25% of field capacity. The results of this study showed that foliar application of seaweed extract significantly increased some morphological and photosynthetic properties, while water stress significantly reduced the investigated parameters.


کلیدواژه‌ها English

bean
growth traits
Photosynthetic pigments
Water stress
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  • تاریخ دریافت 18 خرداد 1405
  • تاریخ انتشار 18 خرداد 1405

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