In vitro placental self and cross pollination in some species

Excised placentae with ovules of <i>Primula pubescens</i>, <i>P. auricula</i>, <i>Scopolia carniolica</i>, <i>Digitalis purpurea</i>, <i>Torenia fournieri</i> and <i>Chionodoxa luciliae</i> were self pollinated in vitro and the development of seeds was observed. The same method was used for obtaining hybrid globular embryos from crosses between: <i>P. pubescens</i> x <i>P. auricula</i>, <i>Scopolia carniolica</i> x <i>Physochlaina praealta</i>, <i>Melandrium album</i> x <i>Silene saxifraga</i> and <i>M. album</i> x <i>Arenaria pungens</i>.

Aphytobius sphaerion (Boheman, 1845), a new species to the fauna of Russia (Coleoptera: Curculionidae: Ceutorhynchinae)

Aphytobius sphaerion (Boheman, 1845), found on Melandrium album (Miller) Krause in the lower basin of the Don River, is recorded for the first time from Russia.

The Biology And Ecology Of Brachycaudus Divaricatae Shaposhnikov (Hemiptera, Aphidoidea) On Prunus Cerasifera Ehrhart In Western Poland

Brachycaudus divaricatae - was described by Shaposhnikov in the Middle East as a heteroecious aphid species migrating between Prunus divaricata and Melandrium album. The research conducted in Poland proved that this species can be described as holocyclic and monoecious. A significantly shortened development cycle with a summer-winter diapause characterizes this species in Poland. The aim of our studies was a detailed research of the species biology conducted to explain this phenomenon. Elements of the biology and ecology of the new fauna species Brachycaudus divaricatae Shap., were studied in Poland during the 2008-2010 time period. The term of spring hatching, number of generations per season, development length of particular generations, lifespan of specimen, and fecundity of particular generations were all defined. The three-year study proved that 6 to 8 aphid generations can develop on P. cerasifera in Poland. The emergence of sexuales (amphigonic females and males) of B. divaricatae occurred very early in the season: in mid-May, and the first eggs were laid in June.

АНТЭКОЛОГИЯ И СЕМЕННАЯ ПРОДУКТИВНОСТЬ НЕКОТОРЫХ ДВУДОМНЫХ РАСТЕНИЙ В ЛЕСОСТЕПИ ЗАУРАЛЬЯ, "БОТАНИЧЕСКИЙ ЖУРНАЛ"

У четырех двудомных растений (Asparagus officinalis, Melandrium album, Silene densiflora, S. artemisetorum) изучены вторичные половые признаки у обеих половых форм, способствующие перекрестному опылению и завязыванию семян в условиях лесостепного Зауралья.

О ПОЛОВОЙ СТРУКТУРЕ ПОПУЛЯЦИЙ НЕКОТОРЫХ ДВУДОМНЫХ РАСТЕНИЙ, "БОТАНИЧЕСКИЙ ЖУРНАЛ"

В результате многолетних исследований (1976-1982 гг.), проведенных в разных ботанико-географических районах, определено соотношение полов у 12 двудомных растений: Cannabis sativa, Rumex acetosella, R. acetosa, R. thyrsiflorus, Melandrium album, Silene densiflora, S. wolgensis, S. artemisetorum, Asparagus officinalis , Cirsium arvense, Stratiotes aloides, Hydrocharis morsus-ranae.