Studies on the Formation Date of Pollen Tube Way of Wheat

Observed the growth course of the wheat pollen tubes on leica multiple-microscope and investigated the seed setting rate in different treatment of stigmas excised after self-pollination. The result showed that the length of pollen tubes was equal to the diameter the pollen pellet 3 min after pollination and the length was longer in 10～20 min, but not entered into ovary. Pollen tubes could be checked on the upper part of ovary at 30 min. several pollen tubes approached the embryo 40 min after self-pollination and sedimentation of callus was found inside pollen tubes, but it was poor. There was much sedimentation in the pollen tubes after self-pollination.The treatment of stigmas excised after-pollination showed that wheat started seed setting 20 min after self-pollination. And the seed setting tend) to stable 40 min after self-pollination.