Stable isotope and photosynthetic response of tea grown under different temperature and light conditions

Wei Xia; Chunlin Li; Jing Nie; Shengzhi Shao; Karyne M Rogers; Yongzhi Zhang; Zuguang Li; Yuwei Yuan

doi:10.1016/j.foodchem.2021.130771

Stable isotope and photosynthetic response of tea grown under different temperature and light conditions

Food Chem. 2022 Jan 30:368:130771. doi: 10.1016/j.foodchem.2021.130771. Epub 2021 Aug 5.

Authors

Wei Xia¹, Chunlin Li², Jing Nie², Shengzhi Shao², Karyne M Rogers³, Yongzhi Zhang², Zuguang Li⁴, Yuwei Yuan⁵

Affiliations

¹ State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Hangzhou 310021, China; College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; Institute of Quality Safety and Nutrition of Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
² State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Hangzhou 310021, China; Institute of Quality Safety and Nutrition of Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
³ State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Hangzhou 310021, China; Institute of Quality Safety and Nutrition of Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; National Isotope Centre, GNS Science, 30 Grace Field Road, Lower Hutt 5040, New Zealand.
⁴ College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. Electronic address: lzg@zjut.edu.cn.
⁵ State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Hangzhou 310021, China; Institute of Quality Safety and Nutrition of Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China. Electronic address: yuanyw@zaas.ac.cn.

PMID: 34438181
DOI: 10.1016/j.foodchem.2021.130771

Abstract

The stable isotope and photosynthesis response of tea (Camellia sinensis) is determined under different light and temperature conditions. The results showed that isotopes of young tea leaves were more enriched with increasing light intensity (31 ~ 411 µmol m^-2∙s^-1). However, the value of δ¹³C and δ¹⁵N seemed depleted, while δ²H and δ¹⁸O became enriched as temperature increasing from 15 to 35 °C. Significant isotope differences were found in tea leaves harvested between early growth (0 ~ 10 days) and later growth (10 ~ 21 days) periods (p < 0.05). Pearson's correlation showed a negative correlation between isotopes (δ¹³C, δ¹⁵N and δ²H) and photosynthetic parameters (EVAP and CI) ranging from 0.497 to 0.872, under 25 °C/203 µmol m^-2∙s^-1. But δ¹⁸O had a weak correlation with all photosynthetic parameters under the same conditions. These distinctive correlations between isotopes and photosynthetic parameters provide new insights which could be used to predict tea isotope responses arising from subtle seasonal or climate change conditions.

Keywords: Light intensity; Photosynthesis; Stable isotopes; Tea (Camellia sinensis); Temperature.

MeSH terms

Camellia sinensis*
Carbon Isotopes / analysis
Isotopes
Photosynthesis*
Plant Leaves / chemistry
Tea
Temperature

Substances

Carbon Isotopes
Isotopes
Tea