Ludhiana, March 28 -- The post-graduate department of botany at Sanmati Government College of Science Education and Research, Jagraon, organised an extension lecture and workshop on Wednesday, under the guidance of college director Gurcharan Singh. A lecture on "Essential Oils and Aroma therapy" was delivered by professor Richa Puri, botany department, Panjab University, Chandigarh. She explained the use of essential oils derived from various flowers and plants to heal and promote health. Two research scholars with the resource person gave hands on training on plant tissue culture to the students....