Characterization of the Difference between Day and Night Temperatures on the Growth, Photosynthesis, and Metabolite Accumulation of Tea Seedlings

Tan, Xiaoqin; Li, Huili; Zhang, Zhongyue; Yang, Yanjuan; Jin, Zhen; Chen, Wei; Tang, Dandan; Wei, Chaoling; Tang, Qian

doi:10.3390/ijms24076718

Open AccessArticle

Characterization of the Difference between Day and Night Temperatures on the Growth, Photosynthesis, and Metabolite Accumulation of Tea Seedlings

by

Xiaoqin Tan

^1,†,

Huili Li

^1,†,

Zhongyue Zhang

¹,

Yanjuan Yang

¹,

Zhen Jin

¹,

Wei Chen

^1,2,

Dandan Tang

^1,2,

Chaoling Wei

^3,* and

Qian Tang

^1,2,*

¹

College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China

²

Tea Refining and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China

³

The State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China

^*

Authors to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Int. J. Mol. Sci. 2023, 24(7), 6718; https://doi.org/10.3390/ijms24076718

Submission received: 23 February 2023 / Revised: 26 March 2023 / Accepted: 28 March 2023 / Published: 4 April 2023

(This article belongs to the Special Issue Horticultural Crop Improvement: A New Era for Plant Molecular Research)

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Abstract

Currently, the effects of the differences between day and night temperatures (DIFs) on tea plant are poorly understood. In order to investigate the influence of DIFs on the growth, photosynthesis, and metabolite accumulation of tea plants, the plants were cultivated under 5 °C (25/20 °C, light/dark), 10 °C (25/15 °C, light/dark), and 15 °C (25/10 °C, light/dark). The results showed that the growth rate of the new shoots decreased with an increase in the DIFs. There was a downward trend in the photosynthesis among the treatments, as evidenced by the lowest net photosynthetic rate and total chlorophyll at a DIF of 15 °C. In addition, the DIFs significantly affected the primary and secondary metabolites. In particular, the 10 °C DIF treatment contained the lowest levels of soluble sugars, tea polyphenols, and catechins but was abundant in caffeine and amino acids, along with high expression levels of theanine synthetase (TS3) and glutamate synthase (GOGAT). Furthermore, the transcriptome data revealed that the differentially expressed genes were enriched in valine, leucine, and isoleucine degradation, flavone/flavonol biosyntheses, flavonoid biosynthesis, etc. Therefore, we concluded that a DIF of 10 °C was suitable for the protected cultivation of tea plants in terms of the growth and the quality of a favorable flavor of tea, which provided a scientific basis for the protected cultivation of tea seedlings.

Keywords: diurnal temperature range; morphology; physiology; biochemical composition; transcriptome; metabolism

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MDPI and ACS Style

Tan, X.; Li, H.; Zhang, Z.; Yang, Y.; Jin, Z.; Chen, W.; Tang, D.; Wei, C.; Tang, Q. Characterization of the Difference between Day and Night Temperatures on the Growth, Photosynthesis, and Metabolite Accumulation of Tea Seedlings. Int. J. Mol. Sci. 2023, 24, 6718. https://doi.org/10.3390/ijms24076718

AMA Style

Tan X, Li H, Zhang Z, Yang Y, Jin Z, Chen W, Tang D, Wei C, Tang Q. Characterization of the Difference between Day and Night Temperatures on the Growth, Photosynthesis, and Metabolite Accumulation of Tea Seedlings. International Journal of Molecular Sciences. 2023; 24(7):6718. https://doi.org/10.3390/ijms24076718

Chicago/Turabian Style

Tan, Xiaoqin, Huili Li, Zhongyue Zhang, Yanjuan Yang, Zhen Jin, Wei Chen, Dandan Tang, Chaoling Wei, and Qian Tang. 2023. "Characterization of the Difference between Day and Night Temperatures on the Growth, Photosynthesis, and Metabolite Accumulation of Tea Seedlings" International Journal of Molecular Sciences 24, no. 7: 6718. https://doi.org/10.3390/ijms24076718

APA Style

Tan, X., Li, H., Zhang, Z., Yang, Y., Jin, Z., Chen, W., Tang, D., Wei, C., & Tang, Q. (2023). Characterization of the Difference between Day and Night Temperatures on the Growth, Photosynthesis, and Metabolite Accumulation of Tea Seedlings. International Journal of Molecular Sciences, 24(7), 6718. https://doi.org/10.3390/ijms24076718

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Characterization of the Difference between Day and Night Temperatures on the Growth, Photosynthesis, and Metabolite Accumulation of Tea Seedlings

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