M. Scott Wells

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Stigmatic exudate-eating chironomid flies (Smittia) and pollen-eating halodid beetles are the most common visitors to flowers ofPseudowintera colorata. Plants are self-incompatible. After selfing pollen tubes penetrate the nucellus; chase pollination experiments show that the incompatibility reaction occurs before fertilization. When pollen is applied to(More)
Human hepatic betaine:homocysteine S-methyltransferase has been purified to apparent homogeneity after a 250-fold separation. The isolation required the presence of homocysteine and a product of the reaction, dimethylglycine, in order to stabilize the protein. An apparent molecular weight of 270,000 was determined by calibrated gel filtration. A single(More)
Temporal patterns of variability in the longevity of the male and female phases of individual flowers and in the gender expression of plants of a dichogamous New Zealand tree,Pseudowintera colorata (Winteraceae), were documented in field studies. Two measures for the duration of phases in a dichogamous flower are distinguished; the nominal phases based on(More)
Cover crop–based organic rotational no-till soybean production has attracted attention from farmers, researchers, and other agricultural professionals because of the ability of this new system to enhance soil conservation, reduce labor requirements, and decrease diesel fuel use compared to traditional organic production. This system is based on the use of(More)
Benzene is metabolized to one or more hematotoxic species. Saturation of benzene metabolism could limit the production of toxic species. Saturation of phase II enzymes involved in the conjugation of the phenolic metabolites of benzene also could affect the hematotoxicity of benzene. To investigate the latter possibility, we exposed male Swiss mice, via the(More)
We described recently the purification and preliminary characterization of human hepatic betaine: homocysteins S-methyltransferase (Skiba, W. E., Taylor, M. P., Wells, M. S., Mangum, J. H., and Awad, W. M., Jr. (1982) J. Biol. Chem. 258, 14944-14948) where it was shown that isovalerate and 3,3-dimethylbutyrate, analogs of dimethylglycine and betaine,(More)
The ability of grass mulches to inhibit weed performance has been linked to their limitations on nitrogen availability to the weeds. Fungal translocation of N from the soil to the surface mulch has been confirmed in laboratories, but this mechanism has not been documented under field conditions. Experiments used 15N (NH4)2SO4 , 99.7 at.%, which was(More)
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