光合作用
同位素
δ13C
稳定同位素比值
山茶
化学
碳同位素
δ18O
正相关
氧同位素
植物
园艺
环境化学
生物
核化学
物理
医学
内科学
总有机碳
量子力学
作者
Wei Xia,Chunlin Li,Jing Nie,Shengzhi Shao,Karyne M. Rogers,Yongzhi Zhang,Zuguang Li,Yuwei Yuan
出处
期刊:Food Chemistry
[Elsevier]
日期:2021-08-05
卷期号:368: 130771-130771
被引量:20
标识
DOI:10.1016/j.foodchem.2021.130771
摘要
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.
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