| 摘要: |
| 【目的】比较东北地区3种耧斗菜属植物幼苗在不同水分处理下的抗性，探索水分管理阈值，为其栽培管理提供理论依据。【方法】以3种耧斗菜属植物(尖萼耧斗菜、小花耧斗菜、耧斗菜)幼苗为材料，通过盆栽控水试验，设土壤相对含水量分别为(90±5)%（T1）、(70±5)%（T2）、(50±5)%（T3）和(30±5)%（T4）4个处理，每5 d测定1次植株的形态，试验进行10，15，20 d时测定生理指标，试验10 d采样后对T3、T4组幼苗进行复水处理，比较3种耧斗菜属植物幼苗在不同水分处理下的表现及复水效果，采用隶属函数法比较3种耧斗菜属植物幼苗的抗性。【结果】3种耧斗菜属植物幼苗在T2处理下外观评分、株高和冠幅均达到最大值；处理10 d时随着土壤含水量的下降，细胞膜透性、丙二醛含量、可溶性糖含量、游离脯氨酸含量、花青素含量、SOD活性和POD活性均呈先下降后上升趋势，最低值基本出现在T2组；可溶性蛋白、叶绿素含量均呈先上升后下降趋势，最高值均出现在T2组；T3、T4组幼苗复水后部分生理指标有所恢复。不同水分处理下3种耧斗菜属植物的抗性强弱依次为尖萼耧斗菜＞耧斗菜＞小花耧斗菜。【结论】土壤相对含水量(70±5)%为3种耧斗菜属植物幼苗生长的最佳水分条件，若考虑节水因素最低可降至(50±5)%。 |
| 关键词: 耧斗菜属植物 植物幼苗 水分处理 生理响应 |
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| 基金项目:吉林省教育厅“十三五”科学技术项目（JJKH20180668KJ）；吉林省林业厅科技推广示范项目（JLT2019-17）；吉林省科技厅科技支撑计划重点项目（20190304008YY）；优质特色寒地花卉资源评价与品种创制（吉林农业大学校内启动基金项目-博士启动基金）；吉林省自然科学基金2020年度项目 |
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| Morphological physiological responses and resistance of seedlings of 3 Aquilegia L. species to different water treatments |
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CHEN Lifei,MENG Yuan,CHEN Cuihong,et al
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| Abstract: |
| 【Objective】The stress resistance of seedlings of three Aquilegia species in northeast China were compared and the water management threshold was explored to provide basis for planting and management of Aquilegia species.【Method】Seedlings of 3 Aquilegia species (A. oxysepala,A. parviflora and A. viridiflora) were used to estimate the damage level and stress resistance by pot experiment under four water treatments including relative water contents of (90±5)% (T1),(70±5)% (T2),(50±5)% (T3) and (30±5)% (T4).Morphological indexes were measured every 5 days,while physiological indexes were measured on the days of 10,15 and 20.Re-watering was conducted after 10 days for groups T3 and T4.The performance and re watering effects of seedlings of Aquilegia species were compared under different water treatments and the stress resistance was compared by membership function.【Result】The maximum values of all seedlings in visual score,plant height and crown diameter appeared in the T2 group.With the reduction of relative water content in substrate,electrolyte leakage,contents of malondiadehyde,soluble sugar,proline,and anthocyanin,and activities of SOD and POD decreased firstly and then increased on day 10.Most minimum values appeared in the T2 group.The contents of soluble protein and chlorophyll increased firstly and then decreased,with the maximum values in the T2 group.Physiological indexes in groups T3 and T4 recovered partially after re watering.Resistance was in the order of A. oxysepala＞A. viridiflora＞A. parviflora.【Conclusion】The best relative water content of substrate was (70±5)% for Aquilegia seedlings,and no less than (50±5)% for water saving. |
| Key words: Aquilegia L.species seedling water treatment physically response |
