The independence of pollen grains: A matter of energy currentbiology
Remarkably, by using advanced molecular genetic technologies, the team of scientists discovered, that barley pollen is able to produce auxin by itself, independently from the mother plant. They identified a pollen specific enzyme, namely HvYUCCA4, which is responsible for the last step of auxin synthesis. The researchers used a mutant plant called male sterile genetic 38 , where HvYUCCA4 is not functional, and the pollen is unable to produce auxin and store starch.
"Our discoveries will have a strong impact in both fundamental plant research and applied cereal breeding", says Acosta."Barley pollen will be a great model system to study auxin synthesis and signaling without the pleiotropic effects commonly associated with auxin deficiency in other plants.
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