The excessive use of pesticide needs to be evaluated. The extent of damage is now reaching even the vertebrates.
Living organisms resort to different mechanisms to cope with their changing environment. Sometimes it also involves changes in the expression of certain genes when exposed to environmental pressure, a process known as phenotypic plasticity.
Recently in a conference of the Ecological Society of America at Baltimore a group of scientists reported the first known example of a vertebrate species developing pesticide resistance through phenotypic plasticity. Genetic assimilation (GA) is a process initiated by phenotypic plasticity that could potentially influence evolutionary responses to novel environments. The researchers used the insecticide carbaryl and tested the ability of 15 wood frog populations distributed across an agricultural gradient to determine if GA contributed to evolution of pesticide tolerance.
They discovered that several wood frog populations which lived closer to agricultural lands could quickly switch on genetic resistance to carbaryl; while populations far from agricultural land…
View original post 323 more words