Physiological and transcriptomic assessment of Arabidopsis identifies two distinct gravity signaling systems.

Abstract excerpt

Plants employ multiple sensing and signaling mechanisms to inform their growth. Earth's gravity is a constant force, which plants perceive and use to direct growth. Despite the ubiquity of gravitropism in plants, the mechanism for signal initiation remains a point of debate. The starch statolith hypothesis suggests that dense amyloplasts sediment within perceptive cells to initiate signaling. However, the...

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