《植物生理学报》 2018, 54(7): 1223-1232

白光与红蓝光比例对番茄壮苗及光合特性的影响

文莲莲¹, 李岩^1,2,3,4,*, 秦利杰¹, 周鑫¹, 倪秀男¹, 刘淑侠¹, 焦娟^1,5, 魏珉^1,2,3,4,*

¹山东农业大学园艺科学与工程学院, 山东泰安271018; ²农业部黄淮海设施农业工程科学观测实验站, 山东泰安271018; ³山东农业大学作物生物学国家重点实验室, 山东泰安271018; ⁴山东果蔬优质高效生产协同创新中心, 山东泰安271018; ⁵泰安市农业科学研究院, 山东泰安271000

通信作者：李岩；E-mail: edmonlee@163.com, minwei@sdau.edu.cn

摘　要：

采用LED (发光二极管)光源, 在相同光强下研究不同比例红(R)蓝(B)白(W)光质对番茄幼苗形态建成和光合特性的影响。结果表明: 与对照(CK, R:B=3:1)相比, R3B1W1 (R:B:W=3:1:1)处理能够显著提高幼苗的茎粗、叶面积、干鲜重和根系构型参数, R9B3W8 (R:B:W=9:3:8)处理与CK无显著差异, 其他处理均低于CK; 根系活力除R3B1W1显著高于CK外, 其他处理均低于CK; 在红蓝光中混合少量白光能够显著增加叶片栅栏组织和海绵组织厚度, 改善光系统II性能, 提高净光合速率(P_n)及光合电子传递速率, 以R3B1W1处理最优。综上, 适宜光强比例的红蓝白光能够改善番茄幼苗叶片结构, 提高幼苗光合效率, 进而促进植株生物量的积累, 有利于壮苗培育。

关键词：光质; 番茄; 光合特性; 壮苗

收稿：2018-03-09   修定：2018-06-22

资助：现代农业产业技术体系专项资金(CARS-25)、国家自然科学基金(31401921)、山东省自然科学基金(ZR2014-CQ029)、国家科技支撑计划(2014BAD05B03)、山东农业大学“双一流”科技创新团队设施园艺优势团队专项(SYL2017YSTD07)、国家重点研发计划(2016YFB0302403)和国家公益性行业(农业)科研专项(201303108)。

Effects of proportions of white, red and blue light qualities on the strong plants and photosynthetic characteristcs in tomato seedlings

WEN Lian-Lian¹, LI Yan^1,2,3,4,*, QIN Li-Jie¹, ZHOU Xin¹, NI Xiu-Nan¹, LIU Shu-Xia¹, JIAO Juan^1,5, WEI Min^1,2,3,4,*

¹College of Horticultural Science and Engineering, Shandong Agricultural University, Taian, Shandong 271018, China; ²Scientific Observing and Experimental Station of Environment Controlled Agricultural Engineering in Huang-Huai-Hai Region, Ministry of Agriculture, Taian, Shandong 271018, China; ³State Key Laboratory of Crop Biology, Shandong Agricultural University, Taian, Shandong 271018, China; ⁴Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, Taian, Shandong 271018, China; ⁵Taian Academy of Agricultural Sciences, Taian, Shandong 271000, China

Corresponding author: LI Yan; E-mail: edmonlee@163.com, minwei@sdau.edu.cn

Abstract:

Using LED (light emitting diode) as light source, the effects of different proportions of red, blue and white light on the morphological and photosynthesis characteristics of tomato (Lycopersicon esculentum) seedlings were studied under the same light intensity. The results showed that compared with CK (R:B=3:1), R3B1W1 (R:B:W=3:1:1) treatment could significantly increase seedling stem diameter, leaf area, dry fresh weight and root configuration parameters, R9B3W8 (R:B:W=9:3:8) treatment had no significant difference with CK, and the other treatments were lower than CK. The root activity of R3B1W1 was significantly higher than that of CK, and other treatments were lower than CK. The combination of red and blue light mixed with a small amount of white light could significantly increase the thickness of leaf palisade tissue and spongy tissue, improve photosystem II performance, increase net photosynthesis rate (P_n) and photosynthetic electron transport rate, and the best treatment was R3B1W1. In summary, the proportion of red, blue and white light with appropriate light intensity can improve the leaf structure of tomato seedlings, increase the photosynthetic efficiency, and then promote the accumulation of plant biomass, which is beneficial to the cultivation of the seedlings.

Key words: light quality; tomato (Lycopersicon esculentum); photosynthetic characteristics; strong seedling