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

被引:6
|
作者
Tan, Xiaoqin [1 ]
Li, Huili [1 ]
Zhang, Zhongyue [1 ]
Yang, Yanjuan [1 ]
Jin, Zhen [1 ]
Chen, Wei [1 ,2 ]
Tang, Dandan [1 ,2 ]
Wei, Chaoling [3 ]
Tang, Qian [1 ,2 ]
机构
[1] Sichuan Agr Univ, Coll Hort, Chengdu 611130, Peoples R China
[2] Sichuan Agr Univ, Tea Refining & Innovat Key Lab Sichuan Prov, Chengdu 611130, Peoples R China
[3] Anhui Agr Univ, State Key Lab Tea Plant Biol & Utilizat, Hefei 230036, Peoples R China
关键词
diurnal temperature range; morphology; physiology; biochemical composition; transcriptome; metabolism; CAMELLIA-SINENSIS; THEANINE; PLANT; YIELD;
D O I
10.3390/ijms24076718
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
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 degrees C (25/20 degrees C, light/dark), 10 degrees C (25/1 degrees C, light/dark), and 15 degrees C (25/10 degrees 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 degrees C. In addition, the DIFs significantly affected the primary and secondary metabolites. In particular, the 10 degrees 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 degrees 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.
引用
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页数:19
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