The hyperpolarisation of the membrane potential in Characeae above that of the diffusion potential is explained by the operation of the electrogenic proton pump. We studied the interaction of calcium with the functioning of the pump. The membrane potential was measured using the standard microelectrode technique. An increase in the calcium concentration resulted in depolarisation, its magnitude...

The records of new localities charophytes from the Yenisey Siberia and confirmations for ones known before were summarized as a result study both available herbarium collections field studies during 2007–2021. twenty species, including one novel genus five species records, 59 (67 % its total number), 127 populations (83 number) found in this region. In particular, 12 (incl. 3 region) are Republ...

This study of Northern Territory charophytes deals with the tribe Nitelleae in family Characeae. We recognise 16 species Nitella for Territory. The list includes seven previously described (Nitella belangeri, N. biformis, congesta, heterophylla, micklei, myriotricha and tumulosa, which belangeri tumulosa are newly recorded Australian flora), nine (N. acanthospora, boreali-australis, crocodylus,...

Electrical characteristics of the node were analyzed in comparison with those of the flank of the internodal cell in Chara corallina. The dependence of the membrane potential of the node on pH and K+ concentration was almost the same as that of the flank. In the flank, the increase in the Ca2+ concentration stopped the depolarization in the presence of 100 mM KCl. In the node, however, Ca2+ cou...