| CO_2浓度升高对万寿菊生长发育与光合生理的影响 |
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| 引用本文： | 胡晓雪,宗毓铮,张仟雨,董琦,尹美强,李萍,郝兴宇.CO_2浓度升高对万寿菊生长发育与光合生理的影响[J].核农学报,2017,31(6). |
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| 作者姓名： | 胡晓雪 宗毓铮 张仟雨 董琦 尹美强 李萍 郝兴宇 |
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| 作者单位： | 山西农业大学农学院,山西太谷,030801 |
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| 基金项目： | 国家自然科学基金(31501276)山西省高等学校科技创新项目，山西省科技攻关项目 |
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| 摘 要： | 为探究经济花卉万寿菊响应CO_2浓度升高的生理机制,以万寿菊金币品种为试材,利用OTC(open top chamber)系统进行CO_2浓度控制试验,测定了万寿菊形态特征、叶片组织结构、光合色素含量、光合作用及糖类代谢物的变化。结果表明,本试验种植的万寿菊维管束中无"花环状"结构,是菊科中的C_3植物。CO_2浓度升高后,万寿菊叶片栅栏组织增多,栅栏组织内的叶绿体数量增加,光合色素含量增加,净光合速率增强,气孔导度和蒸腾速率在现蕾期和初花期下降,而在盛花期增加,水分利用率在各生育时期均增加。此外,CO_2浓度升高后,万寿菊叶片中还原糖含量、可溶性总糖含量、淀粉含量、纤维素含量均增加。植株的株高、茎粗、单株茎秆重、单株总生物量均有增加,花朵总产量增加27.46%。综上可知,CO_2浓度升高促进了万寿菊叶片光合作用和碳代谢,有利于万寿菊的生长发育。本研究结果有助于揭示万寿菊响应CO_2浓度升高的生理机制,为未来的万寿菊生产开发提供了依据。
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| 关 键 词： | CO2浓度 万寿菊 光合作用 糖代谢物 产量 |
Effects of Elevated [CO2] Concentration on Growth and Photosynthetic Physiology in Marigold |
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| HU Xiaoxue,ZONG Yuzheng,ZHANG Qianyu,DONG Qi,YIN Meiqiang,LI Ping,HAO Xingyu.Effects of Elevated [CO2] Concentration on Growth and Photosynthetic Physiology in Marigold[J].Acta Agriculturae Nucleatae Sinica,2017,31(6). |
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| Authors: | HU Xiaoxue ZONG Yuzheng ZHANG Qianyu DONG Qi YIN Meiqiang LI Ping HAO Xingyu |
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| Abstract: | To explore the physiological mechanism of the economic flower marigold in response toelevating of CO2 concentration,the OTC (open top chamber) system was used to control the CO2 concentration and the morphological characteristics,leaf tissue structure,pigment content,photosynthesis and changes in carbohydrate metabolites of the marigold were measured.The results showed that there was no floral hoop structure in the vascular bundles of marigold in this experiment,which was C3 plant in Compositae.When the CO2 concentration increased,the number of chloroplasts,the photosynthetic pigment content and the net photosynthetic rate were increased.Meanwhile,leaf stomatal conductance and transpiration rate was decreased in the squaring stage and the initial flowering stage under elevated CO2],but was increased in full flowering stage;Water use efficiency of marigold was significantly increased in different growth period due to the increased photosynthesis.In addition,the contents of increased reducing sugar,soluble sugar,starch and cellulose content in the leaves of marigold were increased after elevated CO2 concentration.The plant height,stem weight per plant and total biomass weight of marigold were increased by 14.45％,25.33％ and 26.59％,respectively,and flowers yield was increased by 27.46％ in the whole stages under elevated CO2] concentration.To sum up,the increase of CO2 concentration promoted the leaf photosynthesis and carbon metabolism of marigold,which was beneficial to the growth and development of marigold.The achievement of this study will be helpful to reveal the physiological mechanism of marigold in response to elevated CO2 concentration,and provides the basis for marigold production and development in the future. |
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| Keywords: | CO2concentration marigold photosynthesis carbohydrate metabolites yield |
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