RIGHT'S initial analysis (1939) of the behaviour of a self-sterility population followed the discovery by EMERSON (1938, 1939) of a large number (at least 37, later stated by LEWIS [1948] to be 45) of self-incompatibility alleles in Oenothera organensis, a species restricted to a small mountain area in New Mexico. EMERSON found 154 individuals in this population and estimated that the total pop...

Genome size varies dramatically across species, but despite an abundance of attention there is little agreement on the relative contributions of selective and neutral processes in governing this variation. The rate of sex can potentially play an important role in genome size evolution because of its effect on the efficacy of selection and transmission of transposable elements (TEs). Here, we us...

I n a study of the compatibilities of certain Nicotiana species, several crosses were reported which produce seeds unable to germinate. (MCCRAY 1932). Many others are recorded in the literature on this genus. Some of these seeds are parthenocarpic; others have embryos not able to develop. In still other cases the hybrid germinates but is unable to carry on further. All degrees of vigor have bee...

This study was conducted to investigate the effects of foliar endophytic fungi and arbuscular mycorrhizal fungi (AMF) on plant community structure in experimental microcosms containing an assemblage of five species of plants (Oenothera odorata, Plantago asiatica, Trifolium repens, Isodon japonicas and Aster yomena). Leaves of Sasa borealis, Potentilla fragarioides, and Viola mandshurica were co...

The timing of reproduction is a key determinant of Ž tness. Here, we develop parameterized integral projection models of size-related  owering for the monocarpic perennial Oenothera glazioviana and use these to predict the evolutionarily stable strategy (ESS) for  owering. For the most part there is excellent agreement between the model predictions and the results of quantitative Ž eld studie...

C1G and K® uptake by cells of variegated leaves of Oenothera and Tradescantia having normal and mutated chloroplasts, respectively, have been investigated. Under our conditions light has no effect on ion uptake. C l e uptake is highly sensitive to FCCP in both green and mutated cells, while K® uptake is inhibited only in the green cells. Rates of ion uptake are higher in the green than in the m...

TUDIES of plasmon variations in Epilobium (MICHAELIS 1954; CASPARI 1948), Oenothera ( STINSON 1960; STUBBE 1960), Streptocarpus ( OEHLKERS 1938; OEHLKERS and EBELL 1958), Solanum (KOOPMANS 1951,1952,1954,1955, 1959; BUCK 1960), Clarkia (HIORTH 1948), yeast (EPHRUSSI 1953), and Culex ( LAVEN 1959) have demonstrated that heritable plasmon variations exist and are of evolutionary importance. A fur...

The presence of non-native plants on dumps in Kuzbass was studied. 26 included the Black Book Flora Siberia were identified: Acer negundo, Amoria hybrida, Atriplex sagittata, Conium maculatum, Conyza canadensis, Echinochloa crusgalli, Echinocystis lobata, Echium vulgare, Elaeagnus angustifolia, Epilobium adenocaulon, Hordeum jubatum, Impatiens glandulifera, Lactuca serriola, Lepidium densifloru...