In a new study, biologists at the University of Pennsylvania have discovered a leaf protein that
Programs that are not needed in this cell ortissues are effectively switched off by various chromatin modifications. According to Doris Wagner of the School of Arts and Sciences, they have now discovered that leaf protein, which plays an important role in plant cell reprogramming, is also one of those essential transcription factors.
The authors note that plants must constantlyswitch between expressing whole sets of different genes: on rich soils, they can grow well in width, and in drought, on the contrary, express more genes associated with the development of flowers in order to plant seeds before dying.
However, scientists were interested in proteins that couldchange the appearance of the plant. To do this, Wagner and his colleagues used isolated protein and strands of genetic material for the first time to show that various transcription factors are associated with nucleosomes, the subunits of chromatin. In particular, scientists have connected the AP1 genome, which is responsible for flowering.
To confirm this connection, the researchers tookroots of plants and applied a compound that makes them bloom spontaneously. During flowering, they found that not only did the leaves bind strongly to AP1, but the histones also occupied the same piece of DNA.
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