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  • Drought-induced changes in root biomass largely result from altered root morphological traits: Evidence from a synthesis of global field trials

    Author(s)
    Zhou, Guiyao
    Zhou, Xuhui
    Nie, Yuanyuan
    Bai, Shahla Hosseini
    Zhou, Lingyan
    Shao, Junjiong
    Cheng, Weisong
    Wang, Jiawei
    Hu, Fengqin
    Fu, Yuling
    Griffith University Author(s)
    Hosseini-Bai, Shahla
    Year published
    2018
    Metadata
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    Abstract
    Extreme drought is likely to become more frequent and intense as a result of global climate change, which may significantly impact plant root traits and responses (i.e., morphology, production, turnover, and biomass). However, a comprehensive understanding of how drought affects root traits and responses remains elusive. Here, we synthesized data from 128 published studies under field conditions to examine the responses of 17 variables associated with root traits to drought. Our results showed that drought significantly decreased root length and root length density by 38.29% and 11.12%, respectively, but increased root ...
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    Extreme drought is likely to become more frequent and intense as a result of global climate change, which may significantly impact plant root traits and responses (i.e., morphology, production, turnover, and biomass). However, a comprehensive understanding of how drought affects root traits and responses remains elusive. Here, we synthesized data from 128 published studies under field conditions to examine the responses of 17 variables associated with root traits to drought. Our results showed that drought significantly decreased root length and root length density by 38.29% and 11.12%, respectively, but increased root diameter by 3.49%. However, drought significantly increased root:shoot mass ratio and root cortical aerenchyma by 13.54% and 90.7%, respectively. Our results suggest that drought significantly modified root morphological traits and increased root mortality, and the drought‐induced decrease in root biomass was less than shoot biomass, causing higher root:shoot mass ratio. The cascading effects of drought on root traits and responses may need to be incorporated into terrestrial biosphere models to improve prediction of the climate–biosphere feedback.
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    Journal Title
    Plant Cell and Environment
    Volume
    41
    Issue
    11
    DOI
    https://doi.org/10.1111/pce.13356
    Subject
    Biological Sciences
    Agricultural and Veterinary Sciences
    Publication URI
    http://hdl.handle.net/10072/385646
    Collection
    • Journal articles

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