Abscisic Acid Acts as a Regulator of Molecular Trafficking through Plasmodesmata in the Moss Physcomitrella patens.

摘要: In multi-cellular organisms, cell-to-cell communication is crucial for adapting to changes in the surrounding environment. plants, plasmodesmata (PD) provide a unique pathway communication. PD interconnect most cells and generate cytoplasmic continuum, allowing trafficking of various micro- macromolecules between cells. This molecular through dynamically regulated by altering permeability dependent on environmental changes, thereby leading an appropriate response stresses; however, how still largely unknown. Moreover, studies regulation have been conducted primarily limited number angiosperms. Here, we studied moss Physcomitrella patens report that rapidly reversibly restricted abscisic acid (ABA). Since ABA plays key role stress responses moss, can be controlled adapt changes. ABA-dependent restriction correlates with reduction pore size. Furthermore, also found rate macromolecular higher ABA-synthesis defective mutant, suggesting endogenous level important PD-mediated trafficking. Thus, our study provides compelling evidence P. exploits as one regulators function.