NAA处理杨树插穗与乙烯释放

本文阐述了NAA诱导乙烯产生和乙烯利促进插穗生根效果的研究结果。在NAA浓度为10～500ppm范围内处理毛白杨嫩枝插穗,明显促进乙烯释放。在10～100ppmNAA处理中,乙烯释放量随浓度加大而增加,到500ppmNAA则略有下降。NAA处理结束后到乙烯释放之间,有一停滞期,约2～4h。试验证明,将插穗切成小块,增加伤口数量,不能明显引起乙烯释放量增加。乙烯可促进硬枝茎插穗上的潜伏根原基萌发,加速不定根的产生。

ETHYLENE RELEASING RATES OF Populus tomentosaCarr. CUTTINGS AND NAA TREATMENT TREATED MITH NAA

The experiments demonstrated the ethylene releasing of tomentosa cuttings treated with NAA and the rooting promotion effect of ethyphon. The ethylene releasing was obviously promoted -when the soft cuttings of P.tomentosa were treated with 10-500 ppm NAA.The ethylene releasing rate increased with increasing NAA concentration from 10-100 ppm, but slightly reduced with 500 ppm NAA treatment. Between the end of NAA treatment and the releasing of ethylene, there was a 2-4 hr lag period. However, no obvious increase in the ethylene releasing was observed when the cuttings were cut into small pieces to increase the incised wounds. Ethylene can promote the development of latent root primodia in the hard cuttings, and accelerate the formation of adventitious roots.