Shoot surface water uptake enables leaf hydraulic recovery in Avicennia marina

Tomás I. Fuenzalida; Callum J. Bryant; Leuwin I. Ovington; Hwan Jin Yoon; Rafael S. Oliveira; Lawren Sack; Marilyn C. Ball

doi:10.1111/nph.16126

Shoot surface water uptake enables leaf hydraulic recovery in Avicennia marina

Tomás I. Fuenzalida^*, Callum J. Bryant, Leuwin I. Ovington, Hwan Jin Yoon, Rafael S. Oliveira, Lawren Sack, Marilyn C. Ball

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

The significance of shoot surface water uptake (SSWU) has been debated, and it would depend on the range of conditions under which it occurs. We hypothesized that the decline of leaf hydraulic conductance (K_leaf) in response to dehydration may be recovered through SSWU, and that the hydraulic conductance to SSWU (K_surf) declines with dehydration. We quantified effects of leaf dehydration on K_surf and effects of SSWU on recovery of K_leaf in dehydrated leaves of Avicennia marina. SSWU led to overnight recovery of K_leaf, with recovery retracing the same path as loss of K_leaf in response to dehydration. SSWU declined with dehydration. By contrast, K_surf declined with rehydration time but not with dehydration. Our results showed a role of SSWU in the recovery of leaf hydraulic conductance and revealed that SSWU is sensitive to leaf hydration status. The prevalence of SSWU in vegetation suggests an important role for atmospheric water sources in maintenance of leaf hydraulic function, with implications for plant responses to changing environments.

Original language	English
Pages (from-to)	1504-1511
Number of pages	8
Journal	New Phytologist
Volume	224
Issue number	4
DOIs	https://doi.org/10.1111/nph.16126
Publication status	Published - 1 Dec 2019

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title = "Shoot surface water uptake enables leaf hydraulic recovery in Avicennia marina",

abstract = "The significance of shoot surface water uptake (SSWU) has been debated, and it would depend on the range of conditions under which it occurs. We hypothesized that the decline of leaf hydraulic conductance (Kleaf) in response to dehydration may be recovered through SSWU, and that the hydraulic conductance to SSWU (Ksurf) declines with dehydration. We quantified effects of leaf dehydration on Ksurf and effects of SSWU on recovery of Kleaf in dehydrated leaves of Avicennia marina. SSWU led to overnight recovery of Kleaf, with recovery retracing the same path as loss of Kleaf in response to dehydration. SSWU declined with dehydration. By contrast, Ksurf declined with rehydration time but not with dehydration. Our results showed a role of SSWU in the recovery of leaf hydraulic conductance and revealed that SSWU is sensitive to leaf hydration status. The prevalence of SSWU in vegetation suggests an important role for atmospheric water sources in maintenance of leaf hydraulic function, with implications for plant responses to changing environments.",

keywords = "capacitance, drought, foliar water uptake, leaf hydraulic conductance, pressure–volume curve, recovery, shoot water uptake",

author = "Fuenzalida, {Tom{\'a}s I.} and Bryant, {Callum J.} and Ovington, {Leuwin I.} and Yoon, {Hwan Jin} and Oliveira, {Rafael S.} and Lawren Sack and Ball, {Marilyn C.}",

note = "Publisher Copyright: {\textcopyright} 2019 Australian National University New Phytologist {\textcopyright} 2019 New Phytologist Trust",

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doi = "10.1111/nph.16126",

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AU - Fuenzalida, Tomás I.

AU - Bryant, Callum J.

AU - Ovington, Leuwin I.

AU - Yoon, Hwan Jin

AU - Oliveira, Rafael S.

AU - Sack, Lawren

AU - Ball, Marilyn C.

PY - 2019/12/1

Y1 - 2019/12/1

N2 - The significance of shoot surface water uptake (SSWU) has been debated, and it would depend on the range of conditions under which it occurs. We hypothesized that the decline of leaf hydraulic conductance (Kleaf) in response to dehydration may be recovered through SSWU, and that the hydraulic conductance to SSWU (Ksurf) declines with dehydration. We quantified effects of leaf dehydration on Ksurf and effects of SSWU on recovery of Kleaf in dehydrated leaves of Avicennia marina. SSWU led to overnight recovery of Kleaf, with recovery retracing the same path as loss of Kleaf in response to dehydration. SSWU declined with dehydration. By contrast, Ksurf declined with rehydration time but not with dehydration. Our results showed a role of SSWU in the recovery of leaf hydraulic conductance and revealed that SSWU is sensitive to leaf hydration status. The prevalence of SSWU in vegetation suggests an important role for atmospheric water sources in maintenance of leaf hydraulic function, with implications for plant responses to changing environments.

AB - The significance of shoot surface water uptake (SSWU) has been debated, and it would depend on the range of conditions under which it occurs. We hypothesized that the decline of leaf hydraulic conductance (Kleaf) in response to dehydration may be recovered through SSWU, and that the hydraulic conductance to SSWU (Ksurf) declines with dehydration. We quantified effects of leaf dehydration on Ksurf and effects of SSWU on recovery of Kleaf in dehydrated leaves of Avicennia marina. SSWU led to overnight recovery of Kleaf, with recovery retracing the same path as loss of Kleaf in response to dehydration. SSWU declined with dehydration. By contrast, Ksurf declined with rehydration time but not with dehydration. Our results showed a role of SSWU in the recovery of leaf hydraulic conductance and revealed that SSWU is sensitive to leaf hydration status. The prevalence of SSWU in vegetation suggests an important role for atmospheric water sources in maintenance of leaf hydraulic function, with implications for plant responses to changing environments.

KW - capacitance

KW - drought

KW - foliar water uptake

KW - leaf hydraulic conductance

KW - pressure–volume curve

KW - recovery

KW - shoot water uptake

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DO - 10.1111/nph.16126

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SN - 0028-646X

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SP - 1504

EP - 1511

JO - New Phytologist

JF - New Phytologist

IS - 4

ER -

Shoot surface water uptake enables leaf hydraulic recovery in Avicennia marina

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