BUD DEVELOPMENT IN COASTAL DOUGLAS-FIR SEEDLINGS IN RESPONSE TO DIFFERENT DORMANCY-INDUCTION TREATMENTS
BUD DEVELOPMENT IN COASTAL DOUGLAS-FIR SEEDLINGS IN RESPONSE TO DIFFERENT DORMANCY-INDUCTION TREATMENTS
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DOI：
10.1139/b93-153
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发表时间：
1993-10-01
期刊：
影响因子：
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通讯作者：
OWENS, JN
中科院分区：
文献类型：
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作者：
MACDONALD, JE;OWENS, JN
在商业温室条件下研究了沿海花旗松 (Pseudotsuga menziesii (Mirb.) France var. menziesii) 幼苗对不同休眠诱导处理的芽发育反应。共有三种处理：无水分胁迫的短日照、有水分胁迫的短日照和有水分胁迫的长日照。在短日照处理的第一周内，新形成叶的萌生结束，芽鳞萌生开始并结束。快速叶片萌生在第 1 周开始，并在有水分胁迫处理的短日照处理的第 5 周完成，在没有水分胁迫处理的短日照处理的第 6 周完成。缓慢的叶子萌生在第 13 周完成。冠细胞在第 3-6 周在髓内变得明显；细胞壁在第8周和第13周之间增厚。在进行水分胁迫处理的长日照的第一周内，新生叶的形成结束并开始芽鳞的形成。芽鳞萌发在第 3 周或第 4 周结束。然后，叶子萌发开始缓慢，一直持续到第 6 周。在第 8-10 周，叶子萌发速度很快，在第 10-13 周，叶子萌发速度略有下降。到第 13 周，顶端高度明显下降，表明叶子萌生即将结束。第 5-13 周期间，髓内冠细胞变得明显；第 10 周至第 13 周期间细胞壁增厚。
Bud development in response to different dormancy-induction treatments in coastal Douglas-fir (Pseudotsuga menziesii (Mirb.) France var. menziesii) seedlings was investigated under commercial greenhouse conditions. There were three treatments: short day without moisture stress, short day with moisture stress, and long day with moisture stress. Within the first week in the short day treatments, neoformed-leaf initiation ended and bud-scale initiation began and ended. Rapid leaf initiation began in week 1 and was completed by week 5 for the short day with moisture stress treatment and week 6 for the short day without moisture stress treatment. Slow leaf initiation was completed by week 13. Crown cells became apparent within the pith during weeks 3-6; cell walls thickened between weeks 8 and 13. Within the first week of the long day with moisture stress treatment, neoformed-leaf initiation ended and bud-scale initiation began. Bud-scale initiation ended by week 3 or 4. Then slow leaf initiation began and continued until week 6. Rate of leaf initiation was rapid during weeks 8-10 and decreased slightly during weeks 10-13. By week 13, apical height had decreased markedly, indicating an imminent end to leaf initiation. Crown cells became apparent within the pith during weeks 5-13; cell walls thickened between weeks 10 and 13.