A grass “breathing pore” consists of two central, dumbbell-shaped guard cells and two lateral helper cells. (IMAGE)

University of Bern

A grass “breathing pore” consists of two central, dumbbell-shaped guard cells and two lateral helper cells.

Caption

A grass “breathing pore” consists of two central, dumbbell-shaped guard cells and two lateral helper cells.

Credit

© Courtesy of Michael T. Raissig

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