Effects of Sound Stimulation on Physiological and Biochemical Responses of Salvia splendens
محورهای موضوعی : مجله گیاهان زینتی
Salim Heidari
1
(Department of Horticultural Sciences, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran)
Mohsen Kafi
2
(Department of Horticultural Sciences, College of Agriculture and Natural Resources, University of Tehran, Tehran, Iran)
Sepideh Kalatejari
3
(Department of Horticultural Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran)
Mona Shafaghatian
4
(Department of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran)
Nafiseh Mollakarimi
5
(Department of Horticultural Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran)
کلید واژه: Stress, Landscape, Environmental pollution, Floriculture, Sound pollution,
چکیده مقاله :
Plants are inevitably influenced by environmental stresses due to their immobility. Sound waves are one of these environmental factors affecting plants. The present study was designed to explore the less-known relationship between sound waves and plant responses. For this purpose, Salvia splendens, a common plant in urban green spaces, was exposed to sound waves at a frequency of 1000 Hz and at intensities of 90, 100 or 110 dB, as well as a control, for one hour a day for one month. Seedlings were obtained from the seeds of Salvia, were cultivated in an MS medium under in-vitro conditions and were sub-cultured every 20 days. The treatments were started 15 days after planting the seeds. The results of growth and antioxidant enzyme activities showed that the increase in the intensity of the sound waves at 1000 Hz frequency increased plant growth. Maximum root and shoot length, fresh weight and dry weight were observed at 110 dB. The sound waves also increased protein content and catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX) enzymes activity. Malondialdehyde content was increased with an increase in intensity. Overall, Salvia splendens responded to the sound wave stress by improving growth, physiological and biochemical parameters.
گیاهان به ­دلیل غیر متحرک بودن به ­طور اجتناب­ ناپذیری تحت تاثیر استرس‌های محیطی هستند. امواج صوتی یکی از عوامل محیطی است که بر گیاهان اثر می‌گذارد. این مطالعه به­منظور درک رابطه بین گیاهان و امواج صوتی و پاسخ‌های آن‌ها که تاکنون ناشناخته مانده است طراحی گردید. برای این منظور گیاه مریم گلی (Salvia splendens)، یکی از گیاهان رایج در فضای سبز، تحت تاثیر امواج صوتی با فرکانس 1000 هرتز و شدت 90، 100 و 110 دسی بل به مدت یک ماه و هر روز یک ساعت قرار گرفت. گیاهچه‌ها از بذرهای کشت شده در محیط کشت MS بدست آمد و هر 20 روز یک بار واکشت صورت گرفت. زمان آغاز تیمار 15 روز پس از کشت بذور بود. نتایج اندازه‌گیری صفات رشدی و آنتی­اکسیدانی نشان داد که امواج صوتی با افزایش شدت صوت در فرکانس 1000 هرتز موجب افزایش رشد گیاه شدند. بیشترین طول ریشه، طول ساقه، وزن خشک، وزن تر در تیمار 110 دسی بل بدست آمد. امواج صوتی منجر به افزایش محتوی پروتئین و آنزیم­های آنتی­اکسیداتیو کاتالاز، پراکسیداز و آسکوربات پراکسیداز شد. محتوی مالون­دی­آلدهید به­عنوان شاخص تخریب غشای سلولی با افزایش شدت صوت افزایش نشان داد. به­طور کلی، گیاه مریم گلی با افزایش رشد و بهبود صفات فیزیولوژیکی و بیوشیمیایی به تنش امواج صوتی پاسخ داد.
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