1 Department of Applied Sciences, University Institute of Engineering and Technology, Panjab University, Chandigarh 160014, India. Electronic address: gagan1986sidhu@gmail.com.
2 Department of Botany, M.C.M. DAV College for Women, Chandigarh 160036, India.
3 Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
4 Department of Environment Studies, Panjab University, Chandigarh 160014, India.
5 Department of Botany, Panjab University, Chandigarh 160014, India.
6 Department of Botany, Panjab University, Chandigarh 160014, India; Central University of Punjab, Mansa Road, Bathinda 151001, India.