| 光质对辣椒幼苗生长、光合特性及氮代谢的影响 |
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| 引用本文： | 罗鑫辉,刘明月,刘玉兵,黄,科,王军伟.光质对辣椒幼苗生长、光合特性及氮代谢的影响[J].中国蔬菜,2020,1(8):33-40. |
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| 作者姓名： | 罗鑫辉 刘明月 刘玉兵 黄 科 王军伟 |
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| 作者单位： | （湖南农业大学园艺学院，园艺作物种质创新与新品种选育教育部工程研究中心，蔬菜生物学湖南省重点;
实验室，湖南长沙 410128） |
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| 基金项目： | 湖南省现代农业（蔬菜）产业技术体系项目，湖南省科技计划项目（2018NK2022），中国农业科学院科技创新工程协同项目
（CAAS-XTCX2019025） |
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| 摘 要： | 光是植物生长发育的必需条件,为探究光质对辣椒幼苗生长发育的影响,以兴蔬215为试材,分别给予红蓝光(RB=3∶1)、红蓝紫光(RBP=3∶1∶1)、红蓝绿光(RBG=3∶1∶1)、红蓝近红外光(RBF=3∶1∶1)4种不同光质处理,以白光处理为对照(CK),测定并分析了不同光质对辣椒幼苗形态、叶片叶绿素含量、光合特性、叶绿素荧光和氮代谢的影响。结果表明,RBP处理下辣椒幼苗的株高和地上部干、鲜质量最高,同时地下部干、鲜质量均显著高于对照及其他处理。RB、RBG和RBP处理均不同程度地提高了辣椒幼苗叶片的净光合速率,其中RB处理较对照增加幅度最大。RB处理的非光化学淬灭系数(NPQ)显著高于对照及其他处理,RBP处理的单位反应中心吸收的光能(ABS/RC)、被单位反应中心捕获的光能(TR_o/RC)、单位反应中心用于电子传递的能量(ET_o/RC)显著高于对照和其他处理。RBF处理下的硝酸还原酶(NR)、谷氨酸脱氢酶(GDH)、谷氨酸合成酶(GOGAT)活性显著高于对照。综上,RBP处理显著提高了辣椒幼苗叶片吸收、捕获光量子的能力,增加用于电子传递的能量,优化光能分配,增强电子传递的能力,进而提高了辣椒幼苗地上部和地下部干物质积累;结合形态指标和叶绿素荧光的综合表现,在红蓝光基础上增加紫光对辣椒幼苗生长最为有利。
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| 关 键 词： | 辣椒 光合特性 叶绿素荧光 氮代谢 |
Effects of Light Quality on Growth，Photosynthetic Characteristics and Nitrogen Metabolism of Pepper Seedlings |
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| LUO Xin-hui,LIU Ming-yue,LIU Yu-bing,HUANG Ke,WANG Jun-wei.Effects of Light Quality on Growth，Photosynthetic Characteristics and Nitrogen Metabolism of Pepper Seedlings[J].China Vegetables,2020,1(8):33-40. |
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| Authors: | LUO Xin-hui LIU Ming-yue LIU Yu-bing HUANG Ke WANG Jun-wei |
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| Institution: | （College of Horticulture，Hunan Agricultural University，Engineering Research Center for Horticultural Crop Germplasm;
Creation and New Variety Breeding, Ministry of Education，Key Labortory for Vegetable Biology of Hunan Province，Changsha;
410128，Hunan，China） |
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| Abstract: | Light is a necessary condition for plant growth and development．To explore the effect of
light quality on pepper seedlings growth and development，this paper took ‘Xingshu 215’ as test material，
and conducted 4 different light quality treatments as given red+blue light（RB = 3∶1），red+blue+purple light
（RBP = 3∶1∶1），red+blue+green light（RBG = 3∶1∶1） and red+blue+near-infrared light（RBF =
3∶1∶1），and took white light treatment as the contrast（CK）．Then，the paper measured and analyzed the
effects of different light quality on shapes，leaf chlorophyll content，photosynthetic characteristics，chlorophyll
fluorescence and nitrogen metabolism of pepper seedlings．The results showed that the plant height，dry and
flesh weights above ground of pepper seedlings grown under treatment of RBP were the highest．At the same
time，the underground dry and flesh weights were significantly higher than those of the contrast and the other
treatments．All RB，RBG and RBP treatments had improved by different degrees the net photosynthetic rate
of pepper seedling．Among them，RB treatment had the largest increase amplitude than those of the contrast．
NPQ under treatment of RB was significantly higher than those of the contrast and the other treatments．The
value of ABS/RC，TRo/RC and ETo/RC of pepper seedlings under treatment of RBP were significantly higher
than those of the contrast and the other treatments．The treatment of RBF significantly improved the activities
of NR，GDH and GOGAT．In conclusion，The treatment of RBP enhanced dry matter accumulation of
pepper seedlings growth through significantly improving the ability to absorb and capture photons，optimizing
the distribution of light energy and improving the ability of electron transport．Combining the comprehensive
performance of morphological index with chlorophyll fluorescence，increasing purple light on the basis of
red+blue light was most beneficial to the growth of pepper seedlings． |
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| Keywords: | Pepper Photosynthetic Characteristics Chlorophyll fluorescence Nitrogen metabolism |
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