[目的]研究干旱胁迫下蕨类植物生理指标的变化.[方法]采用人工模拟干旱胁迫-复水方法,对5种蕨类植物(肾蕨、凤尾蕨、蜈蚣蕨、铁线蕨、毛蕨)进行干旱处理,研究了干旱胁迫对其叶片相对含水量、相对电导率、叶绿素含量及游离脯氨酸含量等相关生理指标的影响.[结果]随着干旱胁迫时间的延长,5种蕨类植物叶片相对含水量和叶绿素含量均呈下降趋势,而相对电导率和游离脯氧酸含量呈上升趋势;干旱胁迫下,肾蕨各生理指标均好于其他蕨类植物,尤其在胁迫12 d时,差异达显著水平,说明肾蕨的抗旱能力最强;复水后,5种蕨类植物的生理指标均有不同程度的恢复.[结论]该研究可为蕨类植物的开发利用提供理论依据.%[ Objective ] The physiological index variation of fern was studied under drought stress. [ Method ] By means of artificial simulated drought stress and rehydration, the effect of drought stress on physiological indexes ( leaf relative water content, relative conductivity, chlorophyll content and free proline content) of five ferns ( Nephrolepis auriculata, Pteris multiflda, Pteris vittata, Adiantum capillus and Cyclosorus interruptus ) was studied in our paper. [ Result ] With drought stress time prolonging, the leaf relative water content and chlorophyll content of five ferns showed decrease trend, while there was an increase trend in relative conductivity and free proline content; the physiological indexes of Nephrolepis auriculata under drought stress were better than other ferns, with obvious difference after 12 days of stress, and it showed that Nephrolepis auriculata had strongest drought-resistant ability; after rehydration, the physiological indexes of five ferns recovered at different degree. [ Conclusion] Our study could provide theoretical basis for the development and utilization of fern.
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