1. Dayana Abidkulova, Raushan Kaparbay, Ayagoz Tolenova - Al-Farabi Kazakh National university, Almaty, Kazakhstan.
2. Maryna Burlaka - M. G. Kholodny Institute of Botany, NAS of Ukraine, Kyiv, Ukraine.
3. Daryna Zavadska - Taras Schevchenko National University of Kyiv, Kyiv, Ukraine.
4. Heorhii Bondarenko - V. N. Karazin Kharkiv National University, Kharkiv, Ukraine.