Ashwani Kumar Professor, Department of Botany, University of Rajasthan, Jaipur. The author’s repertoire of published works spreads across 150 research articles in various national and international journals. He has an experience of over three decades in his field of research, namely, tissue culture and biochemistry, being awarded with prestigeous V. Puri Medal in 2008 for his services to advancement of Botany. Helena Fernández Associate Professor, Department of Biology of Organisms and Systems, Oviedo University, Spain. Her research focuses on micropropagation and reproduction in ferns during the two last decades. In 2002 she obtained the award “Ramón y Cajal” by The Ministry of Science and Technology, being engaged to the Oviedo University as tenurer, full time, in the Area of Plant Physiology since then. M. Angeles Revilla Plant Physioloy Assistant Professor in the Biology Faculty at the Oviedo University (Spain) since 1987. Twenty years experience in plant tissue culture. She has also worked in cryopreservation and genetic stability for the last ten years, mainly in the development of protocols for in vitro shoot apices in agronomic species.