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Plant function and evolutionary biology
RESEARCH ARTICLE

Effects of shading on physiological characteristics of Bletilla striata

Hanyue Xue A # , Xiaoxuan Zeng A # , Liu Yang A # , Miao Xiong A , Xiaoyu Ming A , Xiantong Wang A , Xuan Yang A , Xiaoyu Wang A , Fuwen Luo A , Chao Zhang B and Xiaofang Yu https://orcid.org/0000-0002-1933-636X A *
+ Author Affiliations
- Author Affiliations

A College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China.

B Industrial Crops Research Institute of Sichuan Academy of Agricultural Sciences, Chengdu 610066, China.

* Correspondence to: xiaofangyu@sicau.edu.cn

# These authors contributed equally to this paper

Handling Editor: Suleyman Allakhverdiev

Functional Plant Biology 52, FP25085 https://doi.org/10.1071/FP25085
Submitted: 13 March 2025  Accepted: 27 June 2025  Published: 15 July 2025

© 2025 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Bletilla striata is a ground cover plant that thrives in cool, humid environments. It has potential horticultural and ecological applications that can benefit from optimising outdoor cultivation techniques by understanding its light requirements and adaptive mechanisms. This study examined the impact of different shading levels on the growth and photosynthetic responses of B. striata. The results showed moderate shading improved growth, increased chlorophyll content, and reduced oxidative stress. Seasonal variation in water availability also influenced reactive oxygen species (ROS) accumulation and antioxidant enzyme activity, particularly during periods of reduced water supply. Moreover, moderate shading enhanced photosynthetic performance by increasing the electron transport rate (ETR), photochemical quenching (qP), and non-photochemical quenching (NPQ), effectively mitigating photoinhibition. In summary, moderate shading enhances the growth and stress tolerance of B. striata, establishing a scientific foundation for improving cultivation practices in horticultural and ecological contexts.

Keywords: antioxidant enzyme activity, environmental adaptation, light intensity, optimization, photosynthesis, physiological properties, reactive oxygen species, shading treatment.

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