Relationship between climate and leaf carbon stable isotope of Hippophae

doi:10.13287/j.1001-9332.202103.007

Abstract

Abstract: We analyzed the relationship between carbon stable isotope characteristics of 131 Hippophae populations and environmental factors by measuring the foliar δ¹³C value in Hippophae. The results showed that the foliar δ¹³C values of Hippophae ranged from -24.65‰ to -29.11‰, with an average of -26.97‰. Hippophae species were C3 plants. For the foliar δ¹³C values, the coefficient variation at intraspecific level was higher than that at interspecific level, indicating that environmental factors should be main factors driving the variations of leaf δ¹³C. The δ¹³C values had no significant correlation with latitude and longitude, but were negatively correlated with altitude. The regression equation was δ¹³C(‰)=0.118VAP-0.007GST-0.000028RDA-20.721 (R²=0.212,P<0.0001). Water vapor pressure (VAP), growing season temperature (GST), and radiation (RDA) were the major factors affecting foliar δ¹³C values. Our results could provide a theoretical basis to understand the responses of Hippophae species to global climate change.

Key words: Hippophae, δ¹³C value, carbon stable isotope, environmental factor

HE Ling-wei, YANG Jun-long, LI Xiao-wei. Relationship between climate and leaf carbon stable isotope of Hippophae[J]. Chinese Journal of Applied Ecology, 2021, 32(3): 819-824.

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