3 research outputs found
The Discovery of Quasi-Human Ichnofossils in the Glen Rose Dolomite, Paluxy River, Texas
The Paluxy River Controversy centers on the identification of certain Ichnofossils (that is, Trace Fossils) which for more than 50 years have been reported to accompany dinosaurian foot prints in the dolomite beds of the Lower Glen Rose Formation, near Forth Worth, Texas. The formation has been assigned an approximate age of 100 million years, according to its position in the Chronostratigraphic Geologic Column. The dolomite beds are separated by clay beds, making it an Ideal lithological sequence for the preservation of footprints
Bruchins: Insect-derived plant regulators that stimulate neoplasm formation
Pea weevil (
Bruchus pisorum
L.) oviposition on pods of specific genetic lines of pea (
Pisum sativum
L.) stimulates cell division at the sites of egg attachment. As a result, tumor-like growths of undifferentiated cells (neoplasms) develop beneath the egg. These neoplasms impede larval entry into the pod. This unique form of induced resistance is conditioned by the
Np
allele and mediated by a recently discovered class of natural products that we have identified from both cowpea weevil (
Callosobruchus maculatus
F.) and pea weevil. These compounds, which we refer to as “bruchins,” are long-chain α,ω-diols, esterified at one or both oxygens with 3-hydroxypropanoic acid. Bruchins are potent plant regulators, with application of as little as 1 fmol (0.5 pg) causing neoplastic growth on pods of all of the pea lines tested. The bruchins are, to our knowledge, the first natural products discovered with the ability to induce neoplasm formation when applied to intact plants