SoylentNews

Arthur T Knackerbracket writes:

Arthur T Knackerbracket has found the following story:

Plants react sensitively to changes in their surroundings and possess the ability to adapt to them. They use the photoreceptor protein phytochrome B to see light and then regulate processes such as seed germination, seedling development, longitudinal growth and flower formation.

A team led by Prof. Dr. Andreas Hiltbrunner from the Institute of Biology II at the University of Freiburg has recently conducted a study that shows that both proteins PCH1 and PCHL influence this receptors' photosensitivity. The researchers recently published their findings in the journal Nature Communications.

[...] In their study, the scientists have now found out that there are two proteins in the thale cress plant, PCH1 and PCHL, which bind to phytochrome B and influence the activity of the receptor. Using a special method of spectroscopy, the researchers showed that the dark reversion of phytochrome B is almost completely suppressed when the amount of PCH1 or PCHL is increased, while the process is accelerated when PCH1 and PCHL are missing. By allowing the plants to regulate the change from the active to the inactive state, they can adapt the photosensitivity of the phytochrome B photoreceptor to different conditions.

Enderle, B., Sheerin, D.J., Paik, I., Kathare, P.K., Schwenk, P., Klose, C., Ulbrich, M.H., Huq, E., and Hiltbrunner, A. (2017). PCH1 and PCHL promote photomorphogenesis in plants by controlling phytochrome B dark reversion. Nature Communications 8: 2221. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/29263319

Original Submission