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Using hyperspectral reflectance to detect changes in photosynthetic activity in Atractylodes chinensis leaves as a

J Liu¹, Y Wang², X M Lin³

¹College of Teacher Education, Hebei Minzu Normal University, 067000 Chengde, Hebei, China.

Photosynthetica

|January 15, 2025

Abstract:

Application of hyperspectral reflectance technology to track changes in photosynthetic activity in Atractylodes chinensis (A. chinensis) remains underexplored. This study aimed to investigate the relationship between hyperspectral reflectance and photosynthetic activity in the leaves of A. chinensis in response to a decrease in soil water content. Results demonstrated that the reflectance in both the visible light and near-infrared bands increased in conjunction with reduced soil water content. The derived vegetable indices of photochemical reflection index (PRI) and the pigment-specific simple ratio of chlorophyll b (PSSR_b) gradually decreased. In contrast, the normalized difference in water index (NWI) and water index (WI) increased. Moreover, significant correlations were observed between PRI, PSSR_b, WI, and NWI and photosynthetic activity indices, namely photosynthetic rate and total performance index. Consequently, hyperspectral reflection represents a productive approach for evaluating the influence of water deficit on photosynthetic activity in A. chinensis leaves.

Keywords:

Atractylodes chinensis hyperspectral reflectance photosynthesis vegetable indices water stress

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