Effects of Supplemental Lighting of Leaves on Growth and  Photosynthetic Performance of Tomato (Coreopsis tinctoria)  Seedlings under Sub-Low Temperature Stress

doi:10.6048/j.issn.1001-4330.2021.08.013

Xinjiang Agricultural Sciences ›› 2021, Vol. 58 ›› Issue (8): 1468-1475.DOI: 10.6048/j.issn.1001-4330.2021.08.013

• Plant Protection·Horticultural Special Local Products·Physiology and Biochemistry·Agricultural Equipment Engineering and Mechanization • Previous Articles Next Articles

Effects of Supplemental Lighting of Leaves on Growth and Photosynthetic Performance of Tomato (Coreopsis tinctoria) Seedlings under Sub-Low Temperature Stress

SONG Yangfan¹, XU Jingcheng², LU Tao², QIN Yong¹

1. College of Forestry and Horticulture, Xinjiang Agricultural University, Urumqi 830052, China;
2. Institute of Vegetables and Flowers, CAAS, Beijing 100081, China

Received:2020-06-11 Online:2021-08-20 Published:2021-08-09
Correspondence author: QIN Yong (1962 -), male, from Gaotai, Gansu Province, master's degree, Professor, doctoral supervisor, research on vegetable cultivation and physiology,(E-mail)352167610@qq.com
LU Tao (1988 -), male, from Yantai, Shandong Province, doctor's degree, assistant researcher, Doctor, Research on adversity regulation and photosynthetic mechanism of protected vegetables,(E-mail)lutao@caas.cn
Supported by:
Basic Scientific R &D Program of Public Welfare Research Institutions of Central Government of China (IVF-BRF2020011) and Regional Collaborative Innovation of Xinjiang Uygur Autonomous Region of China "Research and Demonstration of Seedling Raising Technology Suitable for Vegetable Production in Hotan Area" (2018E02036)

亚低温胁迫下补光对番茄幼苗生长及光合性能的影响

宋扬帆¹, 徐竞成², 路涛², 秦勇¹

1.新疆农业大学林学与园艺学院,乌鲁木齐 830052;
2.中国农业科学院蔬菜花卉研究所,北京 100081

通讯作者: 秦勇(1962-),男,甘肃高台人,教授,硕士,博士生导师,研究方向为蔬菜栽培与生理,(E-mail)352167610@qq.com
路涛(1988-),男,山东烟台人,助理研究员,博士,研究方向为蔬菜栽培与生理,(E-mail)lutao@caas.cn
作者简介:宋扬帆(1994- ),男,陕西省武功县人,硕士研究生,研究方向为蔬菜栽培与生理,(E-mail)1653772384@qq.com
基金资助:
中央级公益性科研院所基本科研业务费专项(IVF-BRF2020011);自治区区域协同创新专项(科技援疆计划)“适于和田地区蔬菜生产的育苗技术研究与示范推广”(2018E02036)

Abstract

Abstract: 【Objective】 This experiment aims to clarify the physiological response of tomato seedlings to supplemental lighting under sub-low temperature stress by studying the effects of supplemental lighting on tomato seedling growth and photosynthetic performance with a view of providing theoretical basis and technical support for the cultivation of strong tomato seedlings under such stress.【Method】 The experiment used the tomato variety 'Money Maker' as the material and employed regular Hoagland nutrient solution for regular quantitative irrigation, and applied white: blue (2∶1) compound light to treat tomato seedlings under sub-low temperature conditions of 15℃/8 (day/night) supplemental lighting. A total of four treatments were set, namely normal temperature without light treatment (CK), normal temperature with supplemental lighting (CK+USL), sub-low temperature stress (LT), sub-low temperature stress supplemental lighting (LT+USL).【Result】 Compared with the sub-low temperature stress, plant height and stem diameter of tomato plants increased significantly by 24.92% and 4.58%, respectively, and the fresh weight of leaves, stems, roots and total fresh weight increased significantly by 24.71%, 23.68%, 31.01% and 25.23%, respectively, total root length, surface area, total volume and projected area of tomato seedlings increased significantly by 25.73%, 29.31%, 25.93% and 14.22% , respectively. In addition, leaf net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) increased by 85.77%, 19.09% and 44.59%, respectively, while the intercellular carbon dioxide concentration (Ci) decreased by 15.60% after supplemental lighting under sub-low temperature.【Conclusion】 Under sub-low temperature stress, supplemental lighting of the leaves can significantly improve the photosynthetic performance of tomato seedlings, thus promoting robust growth of tomato seedlings.

Key words: tomato; sub-low temperature stress; supplemental lighting; photosynthesis; root morphology

摘要： 【目的】研究亚低温逆境胁迫下,补光对番茄幼苗生长发育及光合性能等生理指标的影响,分析亚低温胁迫下番茄幼苗对补光的生理响应,为亚低温胁迫下培育番茄壮苗提供理论依据和技术支撑。【方法】以番茄Money maker为材料,利用改良Hoagland营养液定期定量灌溉,采用白∶蓝为2∶1的复合光于亚低温胁迫条件下(昼15℃/8夜℃)对番茄叶片补光,共设置4个处理:正常温度处理(CK)、正常温度补光处理(CK+USL)、亚低温胁迫处理(LT)和亚低温胁迫补光处理(LT+USL)。【结果】与亚低温胁迫相比,亚低温补光后,番茄植株株高、茎粗分别显著增加24.92%和4.58%,叶、茎、根鲜重及总鲜重分别显著增加了24.71%、23.68%、31.01%和25.23%;番茄幼苗总根长、根系表面积、根系体积及投影面积分别显著增加了25.73%、29.31%、25.93%和14.22%;叶片净光合速率(Pn)、气孔导度(Gs)及蒸腾速率(Tr)分别增加85.77%、19.09%和44.59%,而胞间二氧化碳浓度(Ci)降低15.60%。【结论】亚低温胁迫条件下,叶背面补光可以显著改善番茄幼苗的生长及光合性能,促进番茄幼苗的健壮生长。

关键词: 番茄, 亚低温胁迫, 补光, 光合作用, 根系形态

CLC Number:

S641.2

SONG Yangfan, XU Jingcheng, LU Tao, QIN Yong. Effects of Supplemental Lighting of Leaves on Growth and Photosynthetic Performance of Tomato (Coreopsis tinctoria) Seedlings under Sub-Low Temperature Stress[J]. Xinjiang Agricultural Sciences, 2021, 58(8): 1468-1475.

宋扬帆, 徐竞成, 路涛, 秦勇. 亚低温胁迫下补光对番茄幼苗生长及光合性能的影响[J]. 新疆农业科学, 2021, 58(8): 1468-1475.

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Effects of Supplemental Lighting of Leaves on Growth and Photosynthetic Performance of Tomato (Coreopsis tinctoria) Seedlings under Sub-Low Temperature Stress

亚低温胁迫下补光对番茄幼苗生长及光合性能的影响

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