摘要
用材树种一般约需10年或更长时间才能正常开花结实。提早开花,缩短育种世代是林木育种的重要课题。早在50年代,已有试验证明GA处理柳杉和柏类能促进开花结实。自70年代以来对促进主要用材树种开花结实作了大量的试验,表明用极性较弱的赤霉素GA_4、GA_7,结合采用提高温度、降低土壤水分、环剥和断根等栽培措施,也能促进松、云杉、花旗松等树种的结实,在松科5属17种中已见效果。
6-8 years old Norway spruce grafting plants from 20-30 years old ortets were grown under either inductive condition, hot and dry (HD) , or non-inductive condition, cool and wet(CW). Next year after treated, 95% of the grafting plants treated under HD condition emerged male cones, 63% of them emerged female cones. While neither male nor famale cones appeared for the CW treated grafting plants. The samples for determination of gibberellins were taken two times. The interval between the two sampling occasions was 8 days. The average amount of GA, in the needles of HD treated plants increased from 6.4ng/g( fresh weight) on the first sampling occasion to 10.9ng by the second occasion, whereas decreased from 4.7ng to 2.7ng for CW treated plants(control). There was a decreasing trend of GA_4 content in both plants HD and CW treated, from 2.3ng and 3.2ng to 0.4ng and 1.7ng respectively. The contents of GA_S and GA_1 was less and only examined in few samples so that any relation between contents of them and flowering was found. The analytical results of GAS contents and its metabolism have been discussed in this paper.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1991年第2期168-172,共5页
Scientia Silvae Sinicae
关键词
欧洲云杉
开花
赤霉素
云杉
Gibberellins
Flowering
Norway spruce
