Presence in Plants
In addition to being present in arabidopsis, evidence of ta-siRNAs has also been found in the moss Physcomitrella patens, maize, and a strain of Oryza sativa rice. The trans-acting short-interfering RNA-auxin response factor (tasiR-ARF) is an example of a ta-siRNA that has been shown to be present not only in arabidopsis, but in all of the previous examples. TasiR-ARF is responsible for regulating the signaling molecule Auxin. It does this by targeting the mRNA that encodes several of the Auxin Response Factor (ARF) genes for degradation.
Read more about this topic: Trans-acting Si RNA
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