摘要
研究了在容器栽培条件下，赤霉素（GA3）与低温处理对促进‘凤丹’牡丹种子生根、萌芽和幼苗生长的效果，结果表明：GA3能够促进种子生根，100～200mg·L^-1低浓度处理有利于提高生根率与生根质量；在一定范围内，延长低温处理时间促进种子萌发和幼苗生长；在低温足以打破上胚轴休眠时，较高浓度的GA3对幼苗生长发育不利。综合分析不同处理对发芽率、发芽指数、苗高、叶片数、第1片叶叶宽、茎长以及地上和地下部干质量等指标的影响，发现21d和28d低温分别结合100或200mg·L^-1GA3处理，最有利于种子萌发和幼苗生长。
Effects of gibberellic acid （GA3 ） and chilling treatments on releasing epicotyle and radicle dormancy and promoting seedling growth were studied in Paeonia ostii ＇ Feng Dan＇ to improve the protocol of seedling reproduction. Results showed that GA3treatments with lower concentration （100 -200 mg · L^-1） enhanced the quality of rooting. In a certain range, extending the duration of chilling promoted epicotyle dormancy release and seedling growth and a proper concentration GA3 promoted seedling growth and total biomass accumulation, but when the chilling days were long enough to release epicotyle dormancy, a higher concentration of GA3 was not beneficial to growth. Comprehensive analysis on the effects of various treatments on shoot germination rate, germination index, seedling height, the first leaf width, leaf number, shoot length, shoot and root dry mass within 100 days after seeds were treated suggested that 21 and 28 days chilling combined respectively with 100 mg · L^-1 or 200 mg·L^-1 GA3 were beneficial to both seed germination and seedling growth, which could be extended into the seedling production of ＇Feng Dan＇.
出处
《园艺学报》
CAS
CSCD
北大核心
2008年第4期553-558,共6页
Acta Horticulturae Sinica
基金
国家‘十一五’林业科技支撑计划项目(2006BAD01A08)
国家林业局‘948’项目(2003-4-23)
关键词
牡丹
种子
上胚轴休眠
低温
赤霉素
Paeonia ostii
seed
epicotyle dormancy
chilling
gibberellic acids
作者简介
E-mail：chengfy8@263．net
