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  1. Home
  3. Rgb Imaging And Irrigation Management Reveal Water Stress Thresholds In Three Urban Shrubs In Northern China.
  1. Home
  3. Rgb Imaging And Irrigation Management Reveal Water Stress Thresholds In Three Urban Shrubs In Northern China.

Related Experiment Video

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RGB Imaging and Irrigation Management Reveal Water Stress Thresholds in Three Urban Shrubs in Northern China.

Yuan Niu1,2,3, Xiaotian Xu2,3, Wenxu Huang2,3,4

  • 1Urban Forestry Research Center, Beijing Forestry University, Beijing 100083, China.

Plants (Basel, Switzerland)
|August 14, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Water stress significantly impacts urban shrubs. Deficit irrigation helps maintain plant color, with species like Berberis thunbergii showing higher drought tolerance than Euonymus japonicus.

Keywords:
color indexcolor modedrought toleranceimage processing

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Area of Science:

  • Urban ecology
  • Plant physiology
  • Climate change adaptation

Background:

  • Global climate change intensifies water stress, affecting urban greening.
  • Urban shrubs are crucial for ecological function and landscape aesthetics.
  • Understanding plant responses to water scarcity is vital for sustainable urban landscapes.

Purpose of the Study:

  • To assess the impact of varying water availability on the color indices of three urban greening shrubs.
  • To investigate species-specific responses to drought and deficit irrigation.
  • To provide data for selecting drought-tolerant plants and optimizing irrigation strategies.

Main Methods:

  • A two-year field experiment (2022-2023) with four water treatments: full irrigation, deficit irrigation, natural rainfall, and extreme drought.
  • Monitoring color indices (Greenness Color Coordinate - G_CC, Redness Color Coordinate - R_CC) of Euonymus japonicus, Ligustrum × vicaryi, and Berberis thunbergii var. atropurpurea.
  • Correlating soil water content (SWC) with plant color indices to understand drought tolerance mechanisms.

    • Main Results:

    • Extreme drought significantly reduced G_CC in E. japonicus and R_CC in B. thunbergii var. atropurpurea.
    • L. × vicaryi showed stable color indices (<15% variation) across treatments.
    • Early-season SWC correlated with E. japonicus color (r² = 0.42) but less so with B. thunbergii (r² = 0.28), indicating species-specific responses.
    • Deficit irrigation (SWC ≈ 40%) maintained color indices between full irrigation and drought stress.
    • B. thunbergii retained high R_CC at SWC ≈ 40%, while E. japonicus needed SWC > 60% for optimal G_CC.

    Conclusions:

    • Species-specific responses to water stress are evident in urban shrubs.
    • Deficit irrigation is a viable strategy for maintaining plant aesthetics under water constraints.
    • Berberis thunbergii exhibits greater drought tolerance than Euonymus japonicus.
    • Color coordinates are valuable tools for assessing plant physiological responses to environmental stress.
    • Findings support informed plant selection and water-saving irrigation in urban greening.