《植物生理学报》 2015, 51(12): 2255-2262

补光光质对叶用莴苣光合特性的影响

周成波¹, 张旭¹, 刘彬彬², 艾希珍^1,2, 毕焕改^1,2, 李清明^1,2,3,*

¹山东农业大学园艺科学与工程学院, 山东泰安271018; ²作物生物学国家重点实验室, 山东泰安271018; ³农业部黄淮海设施农业工程科学观测实验站, 山东泰安271018

通信作者：李清明；E-mail: gslqm@sdau.edu.cn

摘　要：

以‘大速生’叶用莴苣为试材, 采用LED光源配置白色、白+红、白+蓝、白+红+蓝4个光配方, 研究了在白光基础上补充不同比例红/蓝光对叶用莴苣生长及光合特性的影响。结果表明: 白+红(WR)处理下叶用莴苣的株高比对照显著增加9.5%, 白+蓝(WB)处理下地上部鲜重较对照提高10%; 白+蓝(WB)处理下净光合速率较对照提高21.7%; 白+红(WR)或白+蓝(WB)处理均显著提高了羧化效率(CE)和RuBP羧化酶活性, 提高了光化学效率, 增强了PSII中心活性, 从而提高了光合性能。而同时补充红光和蓝光(WRB)则不利于叶用莴苣干物质的积累和对光能的有效利用。因此, 可将红光或蓝光作为单色光用于叶用莴苣的补光栽培, 以提高光合性能, 增加产量。

关键词：叶用莴苣; 光质; 光合特性

收稿：2015-09-15   修定：2015-11-19

资助：“十二五”科技支撑计划项目(2012BAD11B01)、公益性行业(农业)专项(201303108)、中国博士后科学基金第四批特别资助(201104646)、山东省自然科学基金面上项目(ZR2013CM008)和山东省高等学校科技计划项目(J14LF06)。

The Effect of Supplementary Light Quality on Physiological Characteristics of Lettuce

ZHOU Cheng-Bo¹, ZHANG Xu¹, LIU Bin-Bin², AI Xi-Zhen^1,2, BI Huan-Gai^1,2, LI Qing-Ming^1,2,3,*

¹College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an, Shandong 271018, China; ²State Key Laboratory of Crop Biology, Tai’an, Shandong 271018, China; ³Scientific Observing and Experimental Station of Environment Controlled Agricultural Engineering in Huang-Huai-Hai Region, Ministry of Agriculture, Tai’an, Shandong 271018, China

Corresponding author: LI Qing-Ming; E-mail: gslqm@sdau.edu.cn

Abstract:

In order to investigate the effect of light quality on growth and photosynthetic characteristics of lettuce, the cultivar ‘Dasusheng’ was used as experimental material, LED was used as light source, we designed four different combinations of light quality: white (W), white plus red (WR), white plus blue (WB), white plus red and blue (WRB). The results showed that plant height increased by 9.5% under white plus red light, the fresh weight of lettuce increased by 10% under white plus blue light; the net photosynthetic rate increased by 21.7% under white plus blue light; WR or WB enhanced carboxylation efficiency (CE) and RuBP carboxylase activity, improved photochemical efficiency, enhanced the activity of PSII center, so improved the photosynthetic performance. But white plus red and blue (WRB) decreased dry matter accumulation and the effective use of light energy. In conclusion, red or blue light can be used as monochromatic light to light-supplement cultivation for lettuce to improve photosynthetic performance and yield.

Key words: lettuce (Lactuca sativa L.); light quality; photosynthetic characteristics