Understanding plant breathing: Study identifies the key protein interplay behind rhythmic stomatal movements, researchers have deciphered the molecular mechanism that regulates the rhythmic movements of stomata throughout the day.
Researchers found that a family of proteins named PIFs accumulate at the end of the night period, and that this is a crucial step to induce stomata opening in the morning.that control the expression of certain genes and, in this case, researchers determined that accumulation of PIFs triggers the expression of KAT1 gene, a guard cell-specific potassium channel that controls the amount of ions and, hence, the amount of water entering these cells.
Although stomata were known to have rhythmic movements and the proteins responsible for opening-closing were already known, this is the first time that the exact transcriptional mechanism regulating stomata aperture during day/night has been elucidated. Moreover, the identification of PIF and KAT1 as essential players in this regulation opens up the possibility for new research avenues and possible biotechnology approaches.
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