| 引用本文: | 沈彦会, 蔡静如, 许建新, 吴 志.华南地区六种蕨类植物耐旱性研究[J].广西植物,2018,38(8):1032-1040.[点击复制] |
| SHEN Yanhui, CAI Jingru, XU Jianxin, WU Zhi.Drought-resistance capability of six ferns from South China[J].Guihaia,2018,38(8):1032-1040.[点击复制] |
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| 摘要: |
| 利用盆栽控水法研究了华南毛蕨、蜈蚣蕨、线羽凤尾蕨、毛叶铁线蕨、长叶肾蕨和普通针毛蕨6种华南地区常见蕨类的耐旱性,测定了植株在自然干旱下的土壤绝对含水量、叶绿素SPAD值、叶片相对含水量和气体交换参数等指标变化。结果表明:随干旱胁迫加剧,叶片相对含水量总体呈下降趋势,其中普通针毛蕨、蜈蚣蕨和长叶肾蕨下降不明显,华南毛蕨降幅最大。叶绿素SPAD值随干旱加剧显著下降,其中华南毛蕨和长叶肾蕨下降幅度较小,蜈蚣蕨下降幅度较大。净光合速率、气孔导度和蒸腾速率随干旱加剧而不断下降,其中普通针毛蕨和蜈蚣蕨下降幅度较小,华南毛蕨下降幅度较大。然而,胞间CO2浓度随着干旱的加剧而不断上升,其中线羽凤尾蕨上升幅度最大,蜈蚣蕨和普通针毛蕨上升幅度较小。以各指标的平均变化速率为原始数据进行隶属函数法分析得出, 六种参试蕨类植物的耐旱能力大小依次为蜈蚣蕨>普通针毛蕨>长叶肾蕨>毛叶铁线蕨>华南毛蕨>线羽凤尾蕨。 |
| 关键词: 蕨类植物, 耐旱性, 光合参数, 隶属函数, 生态修复 |
| DOI：10.11931/guihaia.gxzw201709018 |
| 分类号:Q945 |
| 文章编号:1000-3142(2018)08-1032-09 |
| 基金项目:国家重点研发计划课题(2017YFC0504904); 生态修复抗逆植物育种及产业化项目(深发改 [2014]880号)[Supported by the National Key R & D Program of China(2017YFC0504904); Breeding and Industrialization of Adverse-resistant Plants in Ecological Restoration Program(Development and Reform Commission of Shenzhen Municipality [2014] 880)]。 |
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| Drought-resistance capability of six ferns from South China |
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SHEN Yanhui, CAI Jingru, XU Jianxin*, WU Zhi
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1.Shenzhen Techand Ecology &2.Environment CO., LTD., Shenzhen 518040, Guangdong, China
Shenzhen Techand Ecology & Environment CO., LTD., Shenzhen 518040, Guangdong, China
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| Abstract: |
| The drought-resistance capability of Cyclosorus parasiticus, Pteris vittata, P. linearis, Adiantum pubescens, Nephrolepis biserrata and Macrothelypteris torresiana in South China was studied under the condition of artificial soil desiccation in this paper, and indexes of absolute water content, relative water content, chlorophyll content SPAD value and photosynthetic parameters were measured under drought-stress condition. The results showed that as drought stress increased, the absolute water content of six ferns decreased generally, Macrothelypteris torresiana, Pteris vittataand, Nephrolepis biserrata decreased slightly, and Cyclosorus parasiticus decreased the most. SPAD value decreased as drought stress increased, C. parasiticus and Nephrolepis biserrata decreased slightly, the reduction of Pteris vittata was significantly larger than that of the others. Net photosynthetic rate, leaf transpiration rate and stomatal conductance decreased as drought stress increased. With the increase of intercellular CO2 concentration, Macrothelypteris torresiana and Pteris vittata decreased less, Cyclosorus parasiticus decreased largely, while Pteris linearis increased, Macrothelypteris torresiana and Pteris vittata increased slightly. The drought resistance of six ferns was evaluated by membership function method based on the average rate of change in indexes. The drought resistance order was Pteris vittata > Macrothelypteris torresiana > Nephrolepis biserrata > Adiantum pubescens > Cyclosorus parasiticus > Pteris linearis. |
| Key words: ferns, drought-resistance capability, photosynthetic parameters, membership function, ecological restoration |
