| 谢腾芳1，薛 立2.干旱胁迫对4 种园林绿化树种幼苗光合参数的影响[J].广东农业科学,2017,44(12):53-58 |
|
查看全文
HTML
干旱胁迫对4 种园林绿化树种幼苗光合参数的影响 |
| Effects of drought stress on photosyntheticparameters of four greening seedlings |
| |
| DOI：10.16768/j.issn.1004-874X.2017.12.009 |
| 中文关键词: 干旱胁迫 气体交换参数 主成分分析 园林绿化树种 |
| 英文关键词: drought stress leaf gas exchange parameters principal component analysis greening seedling |
| 基金项目:广州市越秀区科技创新和产业化专项（2017-GX-022） |
|
| 摘要点击次数: 1723 |
| 全文下载次数: 529 |
| 中文摘要: |
| 对海南蒲桃、紫楠、铁冬青、小叶榕等4 种园林绿化树种幼苗干旱胁迫下的叶片气体交换参
数进行研究，利用主成分分析比较4 种树种抗旱能力。结果表明，随着干旱胁迫天数的增加，4 种幼苗的光
合速率、气孔导度、蒸腾速率显著下降，复水4 d 后显著增加，但仍显著低于对照水平；随着干旱胁迫天数
的增加，4 种幼苗的光合速率和胞间CO2 浓度显著降低，而气孔限制值显著增加；干旱胁迫处理期间，铁
冬青、小叶榕叶片的水分利用率持续增加，而紫楠和海南蒲桃呈先升后降趋势。复水处理4 d 后，除小叶榕
外，其余树种均恢复到对照水平。4 种幼苗抗旱性顺序为：铁冬青> 小叶榕> 紫楠> 海南蒲桃。 |
| 英文摘要: |
| The effects of drought stress on leaf gas exchange parameters of four greening seedlings，including
Syzygium hainanense，Phoebe sheareri，Ilex rotunda，Ficus microcarpa，were studied. The results were as follow：
The parameters of net photosynthetic rate（ Pn），stomatal conductance（ Gs） and transpiration rate（ Tr） of the four
seedlings continuously decreased greatly with drought time increasing. After 4 days of rehydration，the four parameters
increased greatly and still lower than the control level. The Pn and intercellular carbon dioxide concentration（ Ci） of
four seedlings greatly decreased with drought time，whereas the value of stomatal limits（Ls） increased gradually. The
water use efficiency（ WUE） of I. rotunda and F. microcarpa continuously decreased with drought time increasing，
whereas that of R. sinica and C. diplopetela increased initially and then decreased. After 4 days of rehydration，
except F. microcarpa，the WUE of the other seedlings returned the control level. The drought resistance of the four
seedlings was evaluated by using principal component analysis，and the order of drought resistance was I. rotunda > F.
microcarpa > P. sheareri > S. hainanense. |
|
查看/发表评论 下载PDF阅读器 |
