کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10691635 | 1019602 | 2014 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Monitoring Plant Response to Environmental Stimuli by Ultrasonic Sensing of the Leaves
ترجمه فارسی عنوان
نظارت بر پاسخ گیاهی به محرک های محیطی توسط حساسیت التراسونیک از برگ ها
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کلمات کلیدی
برگ گیاه محتوای آب، تنش خشکی، چرخه روزانه، اولتراسوند هوایی همراه، طیف سنجی التراسونیک، نظارت بر،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
آکوستیک و فرا صوت
چکیده انگلیسی
Described here is the application of a technique based on the excitation, sensing and spectral analysis of thickness resonances of plant leaves using air-coupled and wide-band ultrasound pulses (150-900 kHz) to monitor variations in leaf properties caused by plant responses to different environmental stimuli, such as a sudden variation in light intensity (from 2000 to 150 μmol mâ2 sâ1), sudden watering after a drought period, and along the diurnal cycle (3-5 days, with continuous variation in light intensity from 150 to 2000 μmol mâ2 sâ1 and change in temperature of about 5°C). Four different widely available species, both monocots and dicots and evergreen and deciduous, with different leaf features (shape, size, thickness, flatness, vascular structure), were selected to test the technique. After a sudden decrease in light intensity, and depending on the species, there was a relative increase in the thickness resonant frequency from 8% to 12% over a 25- to 50-min period. After sudden watering, the relative increase in the resonant frequency varied from 5% to 30% and the period from 10 to 400 min. Finally, along the diurnal cycle, the measured relative variation is between 4% and 10%. The technique revealed differences in both the amplitude of the frequency oscillations and the kinetics of the leaf response for different species and also within the same species, but for specimens grown under different conditions that present different cell structures at the tissue level. The technique can be equally applied to the leaves of any species that present thickness resonances.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasound in Medicine & Biology - Volume 40, Issue 9, September 2014, Pages 2183-2194
Journal: Ultrasound in Medicine & Biology - Volume 40, Issue 9, September 2014, Pages 2183-2194
نویسندگان
Maria Dolores Fariñas, Domingo Sancho Knapik, Jose Javier Peguero Pina, Eustaquio Gil Pelegrin, Tomás E. Gómez Álvarez-Arenas,