TL;DR: Current knowledge of actin and associated proteins in plants is summarized, higher plant actomyosin function is considered, and areas deserving future attention are suggested.
Abstract: Eukaryotes from all four kingdoms contain cytoskeletal actin and associated proteins. Functions for actin are well-defined in animals and include cell contraction, intracellular movement, cell morphology determination, cell locomotion, and cytokinesis (ALLEN and ALLEN 1978, SCHLIWA, 1986). In addition, it is now wellestablished that actin-myosin interaction provides the motive force for cytoplasmic streaming in some lower plants and fungi (for reviews, see ALLEN and ALLEN, 1978, KAMIYA 1981, WILLIAMSON 1980). Evidence for the existence of vascular plant actin and myosin has been accumulating in recent years (reviewed by JACKSON, 1982), although their role in the cell has not been unequivocally defined. This review summarizes current knowledge of actin and associated proteins in plants, considers higher plant actomyosin function, and suggests areas deserving future attention.
TL;DR: It is shown that blebbistatin is an inhibitor of the actin-myosin interaction in the organized contractile system of cardiac muscle and that its action is not due to effects on the Ca(2+) influx and activation systems.
Abstract: Blebbistatin is a powerful inhibitor of actin-myosin interaction in isolated contractile proteins. To examine whether blebbistatin acts in a similar manner in the organized contractile system of st...