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

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 

机构地区：[1]Department of Physics,School of Sciences,Kathmandu University,Dhulikhel,Kavre 45210,Nepal [2]Department of Physics,Tri-Chandra Multiple Campus,Tribhuvan University,Kathmandu 44600,Nepal [3]Department of Chemical Science and Engineering,Kathmandu University,Dhulikhel,Kavre 45210,Nepal [4]Department of Environmental Science and Engineering,Kathmandu University,Dhulikhel,Kavre 45210,Nepal

出　　处：《Plasma Science and Technology》2022年第1期95-107,共13页等离子体科学和技术（英文版）

基　　金：Nepal Academy of Science and Technology(NAST),Khumaltar,Lalitpur,Nepal for providing financial and technical support。

摘　　要：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 

分 类 号：O53[理学—等离子体物理] S631.1[理学—物理]