The Southern Ocean regulates the ocean's biological sequestration of CO2 and is widely suspected to underpin much of the ice age decline in atmospheric CO2 concentration, but the specific changes in the region are debated. Although more complete drawdown of surface nutrients by phytoplankton during the ice ages is supported by some sediment core-based measurements, the use of different proxies ...

Theory predicts that selection should favor genotypes that can vary their tendency to disperse in habitats that are spatially or temporally variable or those that remain near their carrying capacity. Although many marine habitats appear to fit these criteria, confirmed examples of dispersal polymorphism among marine invertebrates are exceedingly rare. Competent larvae of the gregarious tubeworm...

Petrorhagia nanteuilii (Burnat) P. W. Ball & Heywood (Caryophyllaceae), native to western Europe and North Africa an introduced or alien plant in South America, Australia, Japan, was newly found Gyeongsangnam-do, Korea. is clearly distinguished from other genera by a bract at the base of calyx, which differs Gypsophila L., commissures sepals, different Dianthus L. grows on slopes roadsides,...

We partially purified 1-aminocyclopropane-1-carboxylate (ACC) oxidase from senescing petals of carnation (Dianthus caryophyllus L. cv. Nora) flowers and investigated its general characteristics, and, in particular, the inhibition of its activity by ACC analogs. The enzyme had an optimum pH at 7-7.5 and required Fe2+, ascorbate and NaHCO3 for its maximal activity. The Km for ACC was calculated a...

The article contains new information about the locations of rare and spreading species flowering plants in Western Siberia Southern Ural (Kurgan Region, Chelyabinsk Tomsk Republic Altai). Among them, four (Bidens frondosa L., Lappula intermedia (Ledeb.) Popov, Melica altissima Verbascum lychnitis L.) are reported as for three (Aquilegia vulgaris Dianthus barbatus Lepidium sativumL.) Altai, two ...

Rotylenchulus macrodoratus completed its embryogenic development in about 16-19 days at 18-32 C. On olive seedlings the life-cycle from egg to egg was completed in 45-55 days. The first molt occurred in the egg while the other three were superimposed, with retention of successive larval cuticles. Only immature vermiform and swollen egg-laying females were found attached to olive roots. Eggs are...

Thirty-two cultivars of 10 commonly-grown bedding plants, representing eight families, were evaluated for their response to infection by the root-knot nematode, Meloidogyne incognita race 3, under greenhouse conditions. Four ageratum cultivars, two marigold, and two salvia cultivars were rated resistant after exposure for 8 weeks. Four begonia, four celosia, one dianthus, one verbena, one vinca...