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The calcium inhibitors A23187, EGTA and La 3+ inhibit pollen grain germination and growth of pollen tubes of Lilium davidii var. unicolor at different concentrations. Treatment with 10 −4 or 10 −5 M ionophores A23187 reduced germination rate and resulted in distortion of pollen tube. Addition of 2 or 10mM of the chelator EGTA disturbed the direction of pollen tube growth and...
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