| 摘要: |
| 羊蹄甲 Bauhinia purpurea 和洋紫荆 Bauhinia variegata 是羊蹄甲属常见的景观树种，为研究其
不同家系的抗寒能力，利用电导法分别对半年生实生苗进行人工低温胁迫试验。结果表明：随着低温胁
迫的加重，各家系的叶片相对电导率整体呈上升趋势，且不同家系叶片的相对电导率增长速率不同，表
明低温胁迫下各家系叶片的质膜受损程度不同。结合其形态特征变化和后期恢复速度，发现羊蹄甲 Y15、
洋紫荆 G48、G26、G34 家系的叶片相对电导率上升幅度较小，低温胁迫后恢复生长情况良好，表明其抗
寒性较强。 |
| 关键词: 羊蹄甲 洋紫荆 家系 低温胁迫 相对电导率 |
| DOI： |
| 分类号: |
| 基金项目:广州市科技计划项目《洋紫荆花色遗传调控机制研究》(201904010397)。 |
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| Changes of Relative Conductance in Strains of Bauhinia purpurea and Bauhinia variegata under Cold Stress |
|
WANG Yang,WEI Dan,ZHANG Meilan,FENG Zhijian,chenyouguang,zhanggeng
|
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1.Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangdong Province,Guangzhou;2.Nanxiong Academy of Forestry,Guangdong Province;3.South China Agricultural University
|
| Abstract: |
| Bauhinia purpurea and B. variegata are common landscape tree species of Bauhinia. In order
to study the cold resistance ability of different strains, artificial low temperature stress test was carried out by
conductivity method on half year old seedlings respectively, and field test was carried out to screen strains with
strong resistance . The results showed that with the increase of low temperature stress, the relative conductance
of leaves of different strains showed an overall increasing trend and was different from each other, indicating
that the damage degree of plasma membrane of leaves of each strain was different under low temperature stress.
Combined with its morphological characteristics change, the relative conductance of leaves of B. purpurea Y15,
B. variegata G48, G26 and G34 increased slightly, and the growth of leaves recovered well after low temperature
stress, suggesting that they had better resistance to cold. |
| Key words: Bauhinia purpurea Bauhinia variegate family cold resistance relative conductance |
