| 引用本文: | 洪 欣, 单皖粤, 张丹丹, 晁天彩, 温 放, 周守标.钙盐及模拟干旱互作对大花套唇苣苔种子萌发和幼苗生长的影响[J].广西植物,2020,40(10):1457-1465.[点击复制] |
| HONG Xin, SHAN Wanyue, ZHANG Dandan, CHAO Tiancai,
WEN Fang, ZHOU Shoubiao.Effects of calcium salt and simulated drought interaction on seed germination and seedling growth of Damrongia clarkeana[J].Guihaia,2020,40(10):1457-1465.[点击复制] |
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| 钙盐及模拟干旱互作对大花套唇苣苔种子萌发和幼苗生长的影响 |
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洪 欣1, 单皖粤1, 张丹丹2, 晁天彩2, 温 放3,4, 周守标2*
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1. 安徽大学 资源与环境工程学院, 合肥 230601; 2. 安徽师范大学 环境科学与工程学院, 安徽 芜湖 241002;
3. 广西壮族自治区
中国科学院 广西植物研究所, 广西喀斯特植物保育与恢复生态学重点实验室, 广西 桂林 541006;
4. 中国科学院桂林植物园, 中国苦苣苔科植物保育中心, 广西 桂林 541006
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| 摘要: |
| 苦苣苔科原大花旋蒴苣苔(former Boea clarkeana Hemsl.)为我国特有的复苏植物,在最近的修订中被并入套唇苣苔属(Damrongia Kerr),更名为大花套唇苣苔[D. clarkeana(Hemsl.)C. Puglisi]。为了探究该植物对喀斯特特殊生境的适应机制,该文以大花套唇苣苔成熟种子为材料,通过观察钙盐和模拟干旱互作试验,研究了干旱和盐胁迫共同作用对其种子萌发和幼苗生长的影响。结果表明:钙盐及模拟干旱互作时,低浓度钙盐可减轻干旱对种子萌发和幼苗生长的抑制作用,且低程度的干旱与低浓度的钙盐相互作用时反而会促进种子萌发和幼苗生长; 低钙盐低干旱复合条件对大花套唇苣苔生长的促进作用体现了该物种对喀斯特地区保水性差的石灰岩土壤基质的专适性,避免了和其他植物直接生态位的竞争。 |
| 关键词: 大花旋蒴苣苔, 喀斯特地貌, 模拟干旱胁迫, 钙盐胁迫, 幼苗生长, 种子萌发 |
| DOI：10.11931/guihaia.gxzw202003051 |
| 分类号:Q945 |
| 文章编号:1000-3142(2020)10-1457-09 |
| 基金项目:国家自然科学基金(31860047); 安徽省自然科学基金(1908085QC1); 广西喀斯特植物保育与恢复生态学重点实验室基金(19-050-6); 广西自然科学基金(2017GXNSFAA198006)[Supported by the National Natural Science Foundation of China(31860047); Anhui Provincial Natural Science Foundation(1908085QC1); Fund of Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain(19-050-6); Natural Science Foundation of Guangxi(2017GXNSFAA198006)]。 |
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| Effects of calcium salt and simulated drought interaction on seed germination and seedling growth of Damrongia clarkeana |
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HONG Xin1, SHAN Wanyue1, ZHANG Dandan2, CHAO Tiancai2,
WEN Fang3,4, ZHOU Shoubiao2*
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1. School of Resource and Environmental Engineering, Anhui University, Hefei 230601, China; 2. School of Environmental Science and Engineering,
Anhui Normal University, Wuhu 241002, Anhui, China; 3. Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst
Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, Guangxi, China;
4. Gesneriad Conservation Center of China(GCCC)
, Guilin Botanical Garden, Chinese Academy of Sciences, Guilin 541006, Guangxi, China
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| Abstract: |
| The former Boea clarkeana Hemsl.(Gesneriaceae)is a resurrection plant species endemic to China. In the recent revision, it was incorporated into Damrongia Kerr and renamed as D. clarkeana(Hemsl.)C. Puglisi. In this study, mature seeds of D. clarkeana were used as experimental materials to observe the effects of calcium salt and simulated drought interaction experiments on seed germination and seedling growth in order to explore the adaptation mechanism of the plant to special karst habitats. The results showed that when calcium salt and simulated drought interact, low concentration calcium salt can reduce the inhibition of drought on seed germination and seedling growth, and when low concentration drought interacts with low concentration calcium salt, seed germination and seedling growth will be promoted instead. The promotion effect of low calcium salt and low drought combined conditions on the growth of D. clarkeana also reflects the speciality of the species to limestone soil matrix with poor water retention in karst areas, and also avoids direct niche competition with other plants |
| Key words: Damrongia clarkeana, karst landform, simulated drought stress, calcium salt stress, seedling growth, seed germination |
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