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. 2022 Sep 6:13:989271.
doi: 10.3389/fpls.2022.989271. eCollection 2022.

Effects of rare-earth light conversion film on the growth and fruit quality of sweet pepper in a solar greenhouse

Yaxin Gao  1 , Gongfeng Li  1 , Bingbing Cai  1 , Ziming Zhang  1 , Ning Li  1 , Yike Liu  1 , Qingyun Li  1
Affiliations

Effects of rare-earth light conversion film on the growth and fruit quality of sweet pepper in a solar greenhouse

Yaxin Gao et al. Front Plant Sci. .

Abstract

Light is an important environmental factor influencing plant growth and development. However, artificial light supplement is difficult to spread for its high energy consumption. In recent years, rare-earth light conversion film (RPO) covering is being focused on to be a new technology to study the mechanism of light affecting plant growth and development. Compared with the polyolefin film (PO), the RPO film advanced the temperature and light environment inside the greenhouse. Ultimately, improved growth and higher yield were detected because of a higher photosynthesis, Rubisco activity and Rubisco small subunit transcription. Compared with that in the greenhouse with polyolefin film, the plant height, stem diameter and internode length of sweet pepper treated with RPO increased by 11.05, 16.96 and 25.27%, respectively. In addition, Gibberellic acid 3 (GA3), Indole-3-acetic acid (IAA), Zeatin Riboside contents were increased by 11.95, 2.84 and 16.19%, respectively, compared with that with PO film. The fruit quality was improved, and the contents of ascorbic acid (Vc), soluble protein and soluble sugar were significantly higher than those of PO film, respectively, increased by 14.29, 47.10 and 67.69%. On the basis of improved fruit quality, the yield of RPO treatment increased by 20.34% compared with PO film. This study introduces an effective and low-energy method to study the mechanism and advancing plant growth in fruit vegetables production.

Keywords: growth; photosynthesis; quality; rare-earth light conversion film; sweet pepper; yield.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Effects of RPO film on the changes of sunlight intensity and temperature in the greenhouse. (A) Daily variation of light intensity; (B) air temperature and (C) soil (10 cm soil layer) temperature.
Figure 2
Figure 2
Effect of RPO film on the structure of sweet pepper functional leaves. SPT: spongy tissue; PT: palisade tissue.
Figure 3
Figure 3
Effect of RPO film on Photosynthetic Correlation Index of sweet pepper leaves. (A) Photosynthetic rate; (B) Rubisco activity; (C) RbcL gene expression; (D) RbcS gene expression.
Figure 4
Figure 4
Principal component analysis results of RPO on sweet pepper quality and yield.
See this image and copyright information in PMC

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