Timing of photoperiodic competency causes phenological mismatch in balsam poplar (Populus balsamifera L.)
文献类型：SCI/SSCI论文
| 作者 | Soolanayakanahally R. Y. ; Guy R. D. ; Silim S. N. ; Song M. H. |
| 发表日期 | 2013 |
| 关键词 | bud flush bud set climate change growing season length height growth cessation latitude phenology photoperiod induced growth cessation recent climate-change picea-sitchensis genetic-variation local adaptation plant phenology european aspen woody-plants bud set temperature |
| 英文摘要 | Plant phenology is expected to be sensitive to climate warming. In boreal trees, spring flush is primarily temperature driven, whereas height growth cessation and autumn leaf senescence are predominantly controlled by photoperiod. Cuttings of 525 genotypes from the full range of balsam poplar were planted into two common gardens (Vancouver and Indian Head, Canada) at similar latitudes, but with differing winter temperatures and growing seasons. There was clinal variation in spring and, particularly, summer and fall phenology. Bud flush and, despite milder climate, bud set and leaf drop were earlier at Vancouver than at Indian Head by 44, 28 and 7 d, respectively. Although newly flushed growth is insensitive to photoperiod, many genotypes at both sites became competent before the summer solstice. At Vancouver, high-latitude genotypes set dormant terminal buds in mid-spring. Most other genotypes grew until midsummer or set bud temporarily and then experienced a second flush. In both gardens and in a growth chamber experiment, earlier bud set was associated with reduced height growth and higher root/shoot ratios. Shoots attained competency similar to 5 weeks after flushing, which would normally prevent dormancy induction before the solstice, but may be insufficient if spring advances by more than a few weeks. |
| 出处 | Plant Cell and Environment |
| 卷 | 36 |
| 期 | 1 |
| 页 | 116-127 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0140-7791 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30259]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Soolanayakanahally R. Y.,Guy R. D.,Silim S. N.,et al. Timing of photoperiodic competency causes phenological mismatch in balsam poplar (Populus balsamifera L.). 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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