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A Vendian-Cambrian Boundary Succession from the Northwestern Margin of the Siberian Platform: Stratigraphy, Palaeontology, Chemostratigraphy and Correlation
(Cambridge University Press, 1998)
Siberia contains several key reference sections for studies of biological and environmental evolution across the Proterozoic-Phanerozoic transition. The Platonovskaya Formation, exposed in the Turukhansk region of western ...
Molecular Evolution of Genes Controlling Petal and Stamen Development: Duplication and Divergence Within the APETALA3 and PISTILLATA MADS-Box Gene Lineages
(Genetics Society of America, 1998)
The specification of floral organ identity in the higher dicots depends on the function of a limited set of homeotic genes, many of them members of the MADS-box gene family. Two such genes, <i>APETALA3</i> (<i>AP3</i>) and ...
The Genesis and Time Distribution of Two Distinctive Proterozoic Stromatolite Microstructures
(Society for Sedimentary Geology, 1998)
Stromatolites are commonly viewed as sedimentary proxies for microbial communities. In consequence, secular variation in stromatolite form has been attributed to evolutionary change in mat organisms and/or their interactions ...
Morphological Reconstruction of Miaohephyton Bifurcatum, a Possible Brown Alga from the Neoproterozoic Doushantuo Formation, South China
(The Paleontological Society, 1998)
On the basis of morphological and taphonomic study of a large sample population, <i>Miaohephyton bifurcatum</i> Steiner, emend. from the terminal Proterozoic Doushantuo Formation (600-550 Ma), South China, is interpreted ...
A Martian Chronicle
(New York Academy of Sciences, 1998)
Stomatal plugs of Drimys winteri (Winteraceae) protect leaves from mist but not drought
(Proceedings of the National Academy of Sciences, 1998)
Two outstanding features of the flowering plant family Winteraceae are the occlusion of their stomatal pores by cutin plugs and the absence of water-conducting xylem vessels. An adaptive relationship between these two ...
Bias in Template-to-Product Ratios in Multitemplate PCR
(American Society for Microbiology, 1998)
Bias introduced by the simultaneous amplification of specific genes from complex mixtures of templates remains poorly understood. To explore potential causes and the extent of bias in PCR amplification of 16S ribosomal ...
Cloning and Sequencing of a Form II Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase from the Bacterial Symbiont of the Hydrothermal Vent Tubeworm Riftia pachyptila
(American Society for Microbiology, 1998)
The bacterial symbiont of the hydrothermal vent tubeworm fixes carbon via the Calvin-Benson cycle and has been shown previously to express a form II ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO). The gene cbbM, ...
Two New Mycobacterium Strains and Their Role in Toluene Degradation in a Contaminated Stream
(American Society for Microbiology, 1998)
Two toluene-degrading strains, T103 and T104, were isolated from rock surface biomass in a freshwater stream contaminated with toluene. The strains exhibit different capacities for degradation of toluene and other aromatic ...
Three-Dimensional Preservation of Algae and Animal Embryos in a Neoproterozoic Phosphorite
(Nature Publishing Group, 1998)
Phosphorites of the late Neoproterozoic (570 +/- 20 Myr BP) Doushantuo Formation, southern China, preserve an exceptional record of multicellular life from just before the Ediacaran radiation of macroscopic animals. Abundant ...