1. Department of Botany, Connecticut College, New London, CT, USA
2. Papanin’s Institute for Biology of Inland Waters, Russian Academy of Sciences, Russia, 152742 Yaroslavl, Nekouz, Borok
3. K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya str., 35, Moscow, 127276, Russia