Crop traits and production under drought

    Vadez, V and Grondin, A and Chenu, K and Henry, A and Laplaze, L and Millet, E J and Carminati, A (2024) Crop traits and production under drought. Nature Reviews Earth & Environment, 5. pp. 211-225. ISSN 2662-138X

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    Abstract

    Drought limits crop productivity and threatens global food security, with moderate drought stress — when crops grow at a reduced rate — commonly experienced. Increasing plant tolerance to moderate drought is a key target for adaptation and management, but efforts to understand and increase drought tolerance often focus on more extreme drought that causes complete crop failure and only consider crop genetics. In this Review, we discuss the influence of moderate drought on crop productivity and the role of physiological traits in drought tolerance and adaptation. Traits related to crop water use, water capture, water availability, transpiration efficiency and phenology impact drought adaptation, but their overall effect varies situationally. For example, early restrictions in transpiration, higher transpiration efficiency or altered tillering increase water availability during grain filling and can double yield in some drought scenarios. However, these same traits under less severe drought scenarios can also lead to yield penalties. To assess when and under what conditions traits will be beneficial, crop models are used to integrate the effects of genetics, the environment and management, estimating the expected yield responses under these combinations of scenarios and traits. More robust characterization of moderate drought tolerance and better integration between plant genetic information and modelling will enable the local selection of crop varieties suited to the expected drought scenarios.

    Item Type: Article
    Divisions: Research Program : Asia
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Agroecology, Climate change, Ecophysiology
    Subjects: Others > Climate Change
    Depositing User: Mr Nagaraju T
    Date Deposited: 04 Jul 2024 09:39
    Last Modified: 04 Jul 2024 09:39
    URI: http://oar.icrisat.org/id/eprint/12738
    Official URL: https://www.nature.com/articles/s43017-023-00514-w
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: V.V. was supported by the Make Our Planet Great Again (MOPGA) ICARUS project (Improve Crops in Arid Regions and future climates) funded by the Agence Nationale de la Recherche (ANR) (grant ANR-17-MPGA-0011), by the Occitanie Region through a financial contribution to grant ANR-17-MPGA-0011 and by Montpellier University of Excellence (I-Site MUSE). A.G. acknowledges support from the Agence National de la Recherche (PlastiMil grant ANR-20-CE20-0016). A.H. acknowledges support from the Bill and Melinda Gates Foundation projects ‘Stress tolerant rice for Africa and South Asia’ and ‘PlantDirect - Dry Direct Seeded Rice for the Indo-Gangetic Plains of India’. K.C. acknowledges support from the Australian Research Council (ARC Linkage Project LP210200723) and The University of Queensland. L.L. acknowledges support from the Agence National de la Recherche (SorDrought grant ANR-23-CE20-0052).
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