Study On The Factors Which Affect Apple Pollen Germination Rate

In this experiment, regard the production of pure Qinguan pollen Fuji apple trees and orchards as experimental material. By the studies to explore the optimum apple pollen germination conditions, in order to improve apple fruit set.The results show:When pollen germination, the temperature effects on pollen obviously, low temperatures inhibit the germination of pollen. When sucrose solid medium pollen, pollen germination optimum temperature is 27 ℃, when the temperature is lower or higher than this temperature,the germination of pollen germination rate were lower than 27 ℃.Pollen in different concentrations of boric acid treatment, 10 mg / L boric acid concentration best, 5~30mg / L boric acid concentration followed, 40~80mg / L boric acid concentration compared to the control for the effect of promoting pollen germination Qinguan no significant promoting effect, when the boric acid concentration is greater than 90 mg / L,pollen germination has a significant inhibitory effect.10~30mg / L of calcium nitrate has significantly promoting effect on pollen germination,when the concentration is higher than 50 mg / L, will be inhibited pollen germination,it was significantly lower than the control group.when calcium nitrate at a concentration of 20 mg / L,pollen germination promote best, has the highest germination rate.Through pollen culture medium of Vitamin C concentrations obtained, when the concentration of 40~50mg / L,the germination rate was 39.97%, the effect of promoting is the best.When the concentration of GA is 55 mg / L the pollen germination rate is the best. GA on the role of Apple’s trend is to promote pollen germination, when the pollen at a concentration of less than 55 mg / L, the germination increased gradually,when the GA concentration higher than 55 mg / L, pollen promoting effect will gradually weaken, when the concentration is higher than that of GA 85 mg / L, pollen germination inhibition obviously.pH = 6.0 is Qinguan pollen germination optimum pH concentration, when the concentration is below or above this concentration,the pollen germination is significantly inhibited,when the pollen in the acid and alkali environment, it inhibition enhanced.When artificial pollination points awarded to Apple, 80% of corn starch was added the effect would be better.When the pollen medium that various factors treatment, containing 20 mg / L of calcium nitrate in the medium, found that the optimum concentration of boric acid is 40 mg / L.When the medium containing 20 mg / L calcium nitrate and 40 mg / L of boric acid, pollen germination optimum concentration of vitamin C is 20 mg / L.When the medium containing20 mg / L calcium nitrate, 40 mg / L of boric acid and 20 mg / L of vitamin C, set the concentration of GA found that the concentration gradient is 65 mg / L, pollen germination has significant enhancement.When the test in accordance with the conclusions of the ratio of pollination, fruit set rate of apple significantly improved.