D e p a r t m e n t   o f



Prof. K.M.G. Gehan Jayasuriya

Head of the Department / Professor in Botany

B.Sc. (Perad.), Ph.D. (Kentucky, USA)

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About Me

My primary vision is to assist the biodiversity conservation of Sri Lanka by developing the necessary knowledge and creating awareness among people, especially among students. Thus, my major research interest is to study the seed biology of ecologically important native species.

Positions Held

Head, Department of Botany, University of Peradeniya - (September, 2019 to date)

Associate Editor, Botany (Previously Canadian Journal of Botany - Impact factor 1.539) - (June, 2021 - to date)

Member, National experts committee on Mangrove Biodiversity - (2016 -to date)

Faculty Representative, University Research Committee, University of Peradeniya, Peradeniya - (June 2018- to date)

Member, Admission Committee, Faculty Of Science - (December, 2016 - to date)

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Board Member of the Board of Study of Plant Sciences, Postgraduate Institute of Science (PGIS), University of Peradeniya - (2010-2014, 2017- to date)

Editorial Board Member, International Journal of Environmental Issues, PGIS, UOP - (From: August, 2021; continuing....)

Secretary, Research Committee, Faculty of Science, University of Peradeniya - (June, 2018 - June 2021)

Visiting Lecturer for the M.Sc. Programs in Environmental Sciences, Medical Microbiology, Pharmaceutical Botany and Science Education (Biology), Postgraduate Institute of Science, University of Peradeniya - (2010 – to date)

Faculty Representative to Academic Development and Planning Committee - (01/2019 - 10/2020)

Chairmen, Curriculum Development Committee, Faculty of Science, University of Peradeniya - (2013-2018)

Secretary, Curriculum Development Committee, Faculty of Science, University of Peradeniya - (2011-2013)

Visiting Lecturer for the Department of Botany, The Open University of Sri Lanka - (2013, 2018)

Secretary and Board Member, Board of Study in Environmental Sciences, Postgraduate Institute of Science (PGIS), University of Peradeniya - (2014-2017)

Visiting Lecturer for the Department of Radiography and Radiotherapy, Faculty of Allied Health Sciences, University of Peradeniya - (2014, 2015, 2016, 2017)

Co-coordinator, M.Sc. programme in Environmental Science, Postgraduate Institute of Science, University of Peradeniya - (2016 - 2017)

Activity Sub-Coordinator for HETC-QIG-W4 activity 3.1, Research Dissemination and Commercialization Project of the Faculty of Science HETC – Workshop on Seed germination and storage of Queen Palms - (2015)

Treasurer, Federation of University of Peradeniya Teachers Association - (2015-2016, 2016-2017)

President, Science Teachers Association _ University of Peradeniya - (2014-2015)

Secretary, Science Teachers Association _ University of Peradeniya - (2013-2014)

Vice - President, Science Teachers Association _ University of Peradeniya - (2015-2016)

Treasurer, Science Teachers Association _ University of Peradeniya - (2012-2013)

Member, NSF Working Committee on Environment and Biodiversity - (1st June, 2019 - to date)

Ongoing Research and Projects

Propagation protocols for Endangered Mangrove species

Mangroves are one of the attractive plant communities in the tropics and subtropics. In Sri Lanka. In Sri Lanka two true mangrove species; Lumnitzera littorea and Ceriops decandra and one mangrove associate coastal species, Xylocarpus rumphii have been identified as critically endangered species. Further, they have restricted to a few mangrove sites in Sri Lanka. L. littorea was only been observed in one location in Maduganga Ramzar site (Jayatissa et al., 2002). No seedlings or saplings found in the site. Thus, this research was aimed to propagate this important mangrove species.

Propagation of Medicinal plants

In the modern world, herbal medicines are in great demand especially in the developed countries because of their efficacy, safety and lesser side effects (WHO, 2008). However, medicinal plants are becoming rare in Sri Lanka as there is less emphasis on local medicine among the people. This research focused to identify propagation protocols for medicinal plants in Sri Lanka and to popularize these plants among the public.

Mangrove community ecology

Being a tropical island, Sri Lanka also possesses a rich mangrove community. According to the unpublished data of the Forest Department, the extent of the mangroves in the country was 15,699 ha by 2010. Mangrove ecosystems in Sri Lanka have been studied by several researchers (Abeywickrama 1960; Arulchelvam, 1968; De Silva and Balasubramaniam, 1984; Nanayakkara 1986; Pinto, 1986; Jayawardane, 1986; Amarasinghe, 1997; Liyanage, 1997 and Jayatissa et al., 2002). However, only few studies have been conducted on the diversity and physiognomy of mangroves situated in the east coast of Sri Lanka. Thus, this project aims to study the mangrove plant communities in the eastern cost of Sri Lanka.

Seed germination ecology of wild plant species of Sri Lanka

Lack of knowledge on the germination bahviour of the native species is a drawback in restoring degraded ecosystems in Sri Lanka. Thus, this study aims to understand the seed germination behavior of native Sri Lankan species to assist in using them for restoration activities.

Ex-situ seed storage of Sri Lankan wild plant species

Large number of Sri Lankan montane and lowland rain forest species were endemic and some of them are threatened species. As a safer alternative to in-situ conservation ex-situ conservation of these species are important to conserve their genetic diversity to the future. Artificial seed banking is one such ex-situ conservation strategy. However, basic information on seed storage of our native species are scant. Thus, this project focused in to increase the knowledge on seed storage behavior of Sri Lankan native species.

Memberships & Awards


NSF-TWAS Young Scientists Award - (2016)


Presidential Awards for Scientific Publications - (2012)


NRC Merit Awards for Scientific Publications – (2010, 2013, 2015)


Award for the Best Commercially Viable Research Finding at the National Symposium for Floriculture Research, Sri Lanka – (2011)


Prof. M.D. Dassanayake Gold Medal For Botany (University of Peradeniya, Sri Lanka) – (2003)


University prize for academic excellence (University of Peradeniya, Sri Lanka) – (2003)


Life Member, International Association for Seed Science Research


Publons Peer Review Award - (2017)


India Science and Research Fellowship - (2018/2019)