ZHOU Yuan,FANG Linchuan,DONG Yanfang,et al.Responses of Physiology and Photosynthesis to Different Rhododendron Cultivars Under Drought Stress[J].Northern Horticulture,2017,41(07):69-73.[doi:10.11937/bfyy.201707017]
干旱胁迫下不同杜鹃品种生理与光合响应
- Title:
- Responses of Physiology and Photosynthesis to Different Rhododendron Cultivars Under Drought Stress
- 文献标志码:
- A
- 摘要:
- 以“胭脂蜜”“鸳鸯锦”“花蝴蝶”“紫宸殿”“锦袍”“紫鹤”6个杜鹃品种为试材，研究了干旱胁迫下不同杜鹃品种的生理与光合响应。结果表明：随着干旱胁迫时间的延长，所有杜鹃品种叶片出现不同程度的下垂、萎蔫甚至死亡的现象，其中“锦袍”的伤害程度相对最轻。丙二醛（MDA）含量呈持续上升或先升后降的趋势；可溶性蛋白质含量变化较平缓，总体呈下降的趋势，其中“紫鹤”在干旱第10天时含量达到最高；叶绿素含量呈先下降后上升的趋势；初始荧光（Fo）总体呈现下降再平缓上升的状态，其中“花蝴蝶”与“紫鹤”在10 d后急剧下降至无，这与外观形态表现一致；最大光化学效率（Fv/Fm）与PSII潜在活性（Fv/Fo）变化规律一致，除2个干旱敏感品种急剧降低以外，其它品种均保持平稳状态。
- Abstract:
- The responses of physiology and photosynthesis were researched in Rhododendron ‘Yanzhimi’‘Yuanyangjin’‘Huahudie’‘Zichendian’‘Jinpao’‘Zihe’ under drought stress.The results showed that the leaves of Rhododendrons became drop,wilting with different degrees and even died,among those,the leaves of ‘Jinpao’ were hurt most lightly.The content of MDA increased and then decreased.The content of protein of most Rhododendrons appeared a gently decreasing trend but ‘Zihe’ decreased firstly and then increased,reaching the highest point after 10 days.The content of chlorophyll deceased firstly and then increased.Initial fluorescence (Fo) indicated decreasing trend firstly,and then increasing,however,that of ‘Huanhudie’ and ‘Zihe’ decreased sharply to zero and which was consisted with their appearance.The value of Fv/Fm (Optimal photochemical efficiency of PSII) and Fv/Fo (Potential activity of PSII) remained at a certain state,except two drought-sensitivity cultivars (‘Huanhudie’‘Zihe’) decreased sharply.
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备注/Memo
第一作者简介：周媛（1981-），女，湖北武汉人，博士，高级工程师，现主要从事园林植物栽培生理与育种等研究工作。E-mail：zhouyuan@wuhanagri.com.基金项目：武汉市农科院2017年创新团队资助项目（CX2017）；国家自然科学基金青年科学基金资助项目（31300587）。