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Effect of plasma treatment on the seed germination and seedling growth of radish(Raphanus sativus)

Plasma Science and Technology 2022年第1期24卷 95-107页

作者： Rajesh Prakash GURAGAIN Hom Bahadur BANIYA Santosh DHUNGANA Ganesh Kuwar CHHETRI Binita SEDHAI niroj basnet Aavash SHAKYA Bishnu Prasad PANDEY Suman Prakash PRADHAN Ujjwal Man JOSHI Deepak Prasad SUBEDI Department of Physics School of SciencesKathmandu UniversityDhulikhelKavre 45210Nepal Department of Physics Tri-Chandra Multiple CampusTribhuvan UniversityKathmandu 44600Nepal Department of Chemical Science and Engineering Kathmandu UniversityDhulikhelKavre 45210Nepal Department of Environmental Science and Engineering Kathmandu UniversityDhulikhelKavre 45210Nepal

The effect on the germination and seedling growth of radish(Raphanus sativus)seeds were examined employing a dielectric barrier discharge(DBD)at atmospheric pressure and room temperature for various treatment time.DBD plasma using argon gas of flow rate 21 m^(-1)was employed in this study.Radish seeds were treated with DBD plasma for 1-5 min,respectively.Germination characteristics,seedling growth parameters,the contact angle of the seed coat,water uptake capacity,mass loss,the temperature of the seeds,chlorophyll,and carotenoid contents of the seedlings were measured before and after the DBD plasma treatments.Plasma treatment of radish seeds significantly increased germination-related characters,including germination percentage,fresh and dry weight,vigor index,and total carotenoids contents.However,the cumulative production rate was found to be decreased.Results from the experiment indicate an acceleration in the water uptake of the radish seeds and make the seed surface hydrophilic by plasma treatment.Scanning electron microscopy analysis showed that etching effects on the seed coat occurred after the argon plasma treatments,which affected the wettability of the radish seed.The experimental findings showed that seeds being treated by DBD plasma for 2 and 3 min had a positive effect on the germination and seedling growth of radish.

关键词： dielectric barrier discharge(DBD) electron temperature electron density germination growth parameters radish seeds

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