PENG Kuili,DONG Jie,GAO Peng,et al.Comparative Study on Drought Resistance of Four Wild Potentilla in Heilongjiang Province[J].Northern Horticulture,2019,43(16):97-103.[doi:10.11937/bfyy.20190082]
黑龙江省四种野生委陵菜抗旱性的比较
- Title:
- Comparative Study on Drought Resistance of Four Wild Potentilla in Heilongjiang Province
- Keywords:
- wild Potentilla; cell structure; physiological index; chlorophyll fluorescence parameters; drought resistance
- 文献标志码:
- A
- 摘要:
- 为筛选出黑龙江省抗旱性强的优质野生花卉，以4种野生委陵菜为试材，通过细胞学观察、叶绿素荧光参数和生理指标的测定，比较研究了4种野生委陵菜属植物的抗旱性。结果表明：在干旱胁迫下，4种野生委陵菜叶片的细胞结构变化一致，其中菊叶委陵菜有所不同；光合能力变化有明显差异，莓叶委陵菜的PSⅡ的最大光化学效率（Fv/Fm）、表观光合量子传递效率（ETR）、PSⅡ的实际光合效率（PSⅡ）和光化学猝灭系数（qP）降幅最小，表明其叶片光合系统受损程度低；相对电导率（REC）、丙二醛（MDA）含量、过氧化物酶（POD）活性和超氧化物歧化酶（SOD）活性变化趋势一致。通过隶属函数值综合分析抗旱性强弱：莓叶委陵菜＞委陵菜＞菊叶委陵菜＞蛇莓委陵菜。
- Abstract:
- Selecting wild plant resources with strong drought resistance is very important in Heilongjiang Province.The cytology,chlorophyll fluorescence parameters and physiological indexes of 4 wild Potentilla species under drought treatment were measured.The results showed that the cell structure of 4 Potentilla leaves changed uniformly,and P.tanacetifolia thickened a layer of palisade tissue.There were significant difference of 4 Potentilla on photosynthetic capacity,in which P.fragarioodes had minimum decline of maximum photochemical efficiency(Fv/Fm) of PSⅡ,apparent photosynthetic efficiency (ETR),PSⅡ actual photosynthetic efficiency (PSⅡ) and photochemical quenching coefficient (qP) among 4 species.That meant there were the lowest damage of photosynthetic system in P.fragarioodes leaves under stress.Meanwhile,relative conductivity (REC),malondialdehyde (MDA) contents,peroxidase (POD) activity and superoxide dismutase (SOD) activity of 4 plants indicated same trend.The results suggested that the drought resistance of 4 Potentilla were P.fragarioodes>P.chinensis>P.tanacetifolia>P.centigrana,which were analyzed by comprehensive membership function.
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备注/Memo
第一作者简介：彭奎莉（1994-），女，硕士研究生，研究方向为园林植物育种。E-mail：759969610@qq.com.责任作者：车代弟（1964-），女，博士，教授，博士生导师，现主要从事园林植物遗传育种及应用等研究工作。E-mail:daidiche@neau.edu.cn.基金项目：国家重点研发资助项目（2016YFC0500300）。收稿日期：2019-03-12