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Review
. 2023 Sep;239(6):2099-2107.
doi: 10.1111/nph.19069. Epub 2023 Jun 29.

The dynamic multi-functionality of leaf water transport outside the xylem

Christine Scoffoni  1 , Caetano Albuquerque  1 , Thomas N Buckley  2 , Lawren Sack  3
Affiliations
Free article
Review

The dynamic multi-functionality of leaf water transport outside the xylem

Christine Scoffoni et al. New Phytol. 2023 Sep.
Free article

Abstract

A surge of papers have reported low leaf vulnerability to xylem embolism during drought. Here, we focus on the less studied, and more sensitive, outside-xylem leaf hydraulic responses to multiple internal and external conditions. Studies of 34 species have resolved substantial vulnerability to dehydration of the outside-xylem pathways, and studies of leaf hydraulic responses to light also implicate dynamic outside-xylem responses. Detailed experiments suggest these dynamic responses arise at least in part from strong control of radial water movement across the vein bundle sheath. While leaf xylem vulnerability may influence leaf and plant survival during extreme drought, outside-xylem dynamic responses are important for the control and resilience of water transport and leaf water status for gas exchange and growth.

Keywords: Kleaf; P50; aquaporins; intercellular airspaces; veins; water relations.

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References

    1. Albuquerque C, Scoffoni C, Brodersen CR, Buckley TN, Sack L, McElrone AJ. 2020. Coordinated decline of leaf hydraulic and stomatal conductances under drought is not linked to leaf xylem embolism for different grapevine cultivars. Journal of Experimental Botany 71: 7286-7300.
    1. Attia Z, Dalal A, Moshelion M. 2020. Vascular bundle sheath and mesophyll cells modulate leaf water balance in response to chitin. The Plant Journal 101: 1368-1377.
    1. Blackman CJ, Brodribb TJ, Jordan GJ. 2009. Leaf hydraulics and drought stress: response, recovery and survivorship in four woody temperate plant species. Plant, Cell & Environment 32: 1584-1595.
    1. Brodribb TJ, Brodersen CR, Carriqui M, Tonet V, Rodriguez Dominguez C, McAdam S. 2021. Linking xylem network failure with leaf tissue death. New Phytologist 232: 68-79.
    1. Brodribb TJ, Holbrook NM. 2004. Diurnal depression of leaf hydraulic conductance in a tropical tree species. Plant, Cell & Environment 27: 820-827.

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