Effects of Pollen of Pinus thunbergii Induced by Different Radiant Factors

Key words: 
• Pinus thunbergii /
• pollen /
• different radiation source /
• biological effect

Abstract: The effects of pollens and pollen tubes of Pinus thunbergii induced respectively by N⁺ beam, γray and ultraviolet ray were measured , and the differences of the effects caused by the different radiant factors were distinguished. The results showed that there was obvious difference in the damages of the pollen germination and the pollen tube growth led by the radiant factors. The curve of dose effects from γray irradiation was similarly S type, and that from ultraviolet ray treatment approximately L type . The effects from ion implantation expressed the two characteristics, the curve of the saddle type and the top inflation of pollen tube.