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| 不同基因型茶菊对盐胁迫的响应 | |
| 引用本文： | 吕晋慧,任磊,李艳锋,王玄,赵夏陆,张春来.不同基因型茶菊对盐胁迫的响应[J].植物生态学报,2013,37(7):656. |
| 作者姓名： | 吕晋慧 任磊 李艳锋 王玄 赵夏陆 张春来 |
| 作者单位： | 山西农业大学林学院, 山西太谷 030801 山西省农业科学院高粱研究所, 山西榆次 030600 |
| 基金项目： | 国家自然科学基金，山西省攻关项目，高等学校优秀青年学术带头人支持计划 |
| 摘 要： | 为探讨不同基因型茶菊(tea Chrysanthemum)在盐胁迫下的生理响应并对其进行耐盐性评价, 以4个不同基因型茶菊为材料, 采用营养液浇灌法, 研究了不同浓度NaCl (0、40、80、120、160、200 mmol·L-1)胁迫下茶菊生理生化和光合生理响应特性。结果表明: 随着NaCl胁迫程度加大, 不同基因型茶菊叶片细胞膜透性(Cond)、丙二醛(MDA)含量、叶片脯氨酸(Pro)含量和可溶性糖(SS)含量增加; 超氧化物歧化酶(SOD)含量呈先升后降趋势; ‘乳荷’、‘黄滁龙’叶绿素(Chl)含量持续下降, ‘繁白露’和‘玉人面’叶绿素含量呈先升后降的趋势; 净光合速率(Pn)、蒸腾速率(Tr)和气孔导度(Gs)随NaCl胁迫浓度提高而极显著降低, 气孔限制值呈先升后降的趋势。采用隶属函数法对茶菊进行耐盐性评价, 不同基因型茶菊耐盐性由强到弱依次为‘乳荷’ > ‘玉人面’ > ‘繁白露’ > ‘黄滁龙’。其中, 耐盐性品种‘玉人面’、‘乳荷’在NaCl胁迫下, Chl含量、Pn、Tr和Gs下降幅度小, MDA含量和气孔限制值增幅较小。 |
| 关 键 词： | NaCl胁迫 光合生理 生理响应 耐盐性 茶菊 |
| 收稿时间： | 2013-01-07 |
Responses to salt stress among different genotypes of tea Chrysanthemum |
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| Affiliation: | College of Forestry, Shanxi Agricultural University, Taigu, Shanxi 030801, China Institute for Sorghum Research, Shanxi Academy of Agricultural Sciences, Yuci, Shanxi 030600, China |
| Abstract: | Aims Our objective was to investigate the physiological response of tea Chrysanthemum cultivars to salt stress in order to select salt-tolerant cultivars for use in saline soil. Methods Stress physiological, biochemical and photosynthetic physiological parameters were measured for four tea Chrysanthemum cultivars, which were irrigated with nutrient solution adding different concentrations of NaCl (40, 80, 120, 160 and 200 mmol·L-1) as treatment and without addition of NaCl as control. Important findings Following the increase with the degree of NaCl stress, data of relative membrane permeability (Cond), malonic aldehyde (MDA), proline (Pro) and soluble sugar (SS) content were increased in leaves of different genotypes of tea Chrysanthemum, while superoxide dismutase (SOD) activity was initially increased and then decreased. Leaf chlorophyll (Chl) content of the ‘Fanbailu’ and ‘Yurenmian’ cultivars were initially increased then decreased, but continued to decline in the ‘Ruhe’ and ‘Huangchulong’ cultivars. Net photosynthetic rate (Pn), transpiration rate (Tr) and stomatal conductance (Gs) were significantly reduced, but the stomatal limitation value was first increased and then decreased following the increase of salt concentrations. Values of subordinate function were used to evaluate the salt tolerance among different tea Chrysanthemum cultivars. The salinity tolerance for those cultivars was ‘Ruhe’ > ‘Yurenmian’ > ‘Fanbailu’ > ‘Huangchulong’. Under NaCl stress, parameters for Chl, Pn, Tr and Gs were decreased less in ‘Yurenmian’ and ‘Ruhe’ than in the other two cultivars while parameters for MDA content and stomatal limitation value were increased less in ‘Yurenmian’ and ‘Ruhe’ than in the other two cultivars. |
| Keywords: | NaCl stress photosynthetic physiology physiological response salt tolerance tea Chrysanthemum |
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