How Wolbachia bateria feminize its male host?
A sex - changing bacteria can change the sex ratios towards females in offspring born by the infected mother hosts, according to a research of Ilaria Negri, Alberto Alma and their teamers.
A team of researchers from three different Italian universities (Turin, Modena and Milan University) corporately unraveled the ability of the bacteria Wolbachia pipientis in reprogramming the male imprinting in its hosts, the leafhoppers Zyginidia pullula, to increase the rate of infected females in the next generation. Wolbachia pipientis is a trans-generational symbiotic parasite that spreads its infection to the next progeny via the hosts' eggs.
Exception of original structure of the last abdominal segment that is still remained in the feminized males; the bacteria altered the males' characteristics so perfectly that they can become females in the observation of genital structure, sexual mates and even productive ability in some cases.
The teams also discovered there were two kinds of feminized males depending on their testes or ovaries found. However, the feminization only occurred with a threshold of bacterial density.
As an external factor of the leafhopper, Wolbachia can prove that changes regarding environmental factors can be inherited from generation to generation. So, which is your side in evolutionary theory- Lamarck or Darwin?
http://rspb.royalsocietypublishing.org/content/early/2009/04/01/rspb.2009.0324.abstract
Thao Tran
A team of researchers from three different Italian universities (Turin, Modena and Milan University) corporately unraveled the ability of the bacteria Wolbachia pipientis in reprogramming the male imprinting in its hosts, the leafhoppers Zyginidia pullula, to increase the rate of infected females in the next generation. Wolbachia pipientis is a trans-generational symbiotic parasite that spreads its infection to the next progeny via the hosts' eggs.
Exception of original structure of the last abdominal segment that is still remained in the feminized males; the bacteria altered the males' characteristics so perfectly that they can become females in the observation of genital structure, sexual mates and even productive ability in some cases.
The teams also discovered there were two kinds of feminized males depending on their testes or ovaries found. However, the feminization only occurred with a threshold of bacterial density.
As an external factor of the leafhopper, Wolbachia can prove that changes regarding environmental factors can be inherited from generation to generation. So, which is your side in evolutionary theory- Lamarck or Darwin?
http://rspb.royalsocietypublishing.org/content/early/2009/04/01/rspb.2009.0324.abstract
Thao Tran
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