Partial rootzone drying increases water-use efficiency of lemon Fino 49 trees independently of root-to-shoot ABA signalling

Lancaster Environment Centre

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Partial rootzone drying increases water-use efficiency of lemon Fino 49 trees independently of root-to-shoot ABA signalling. / Perez-Perez, J. G.; Dodd, I. C.; Botia, P.
In: Functional Plant Biology, Vol. 39, No. 5, 2012, p. 366-378.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Perez-Perez, JG, Dodd, IC & Botia, P 2012, 'Partial rootzone drying increases water-use efficiency of lemon Fino 49 trees independently of root-to-shoot ABA signalling', Functional Plant Biology, vol. 39, no. 5, pp. 366-378. https://doi.org/10.1071/FP11269

APA

Perez-Perez, J. G., Dodd, I. C., & Botia, P. (2012). Partial rootzone drying increases water-use efficiency of lemon Fino 49 trees independently of root-to-shoot ABA signalling. Functional Plant Biology, 39(5), 366-378. https://doi.org/10.1071/FP11269

Vancouver

Perez-Perez JG, Dodd IC, Botia P. Partial rootzone drying increases water-use efficiency of lemon Fino 49 trees independently of root-to-shoot ABA signalling. Functional Plant Biology. 2012;39(5):366-378. doi: 10.1071/FP11269

Author

Perez-Perez, J. G. ; Dodd, I. C. ; Botia, P. / Partial rootzone drying increases water-use efficiency of lemon Fino 49 trees independently of root-to-shoot ABA signalling. In: Functional Plant Biology. 2012 ; Vol. 39, No. 5. pp. 366-378.

Bibtex

@article{576d442ae05d4dac880f42714e170df3,

title = "Partial rootzone drying increases water-use efficiency of lemon Fino 49 trees independently of root-to-shoot ABA signalling",

abstract = "To determine whether irrigation strategy altered the sensitivity of Citrus leaf gas exchange to soil, plant and atmospheric variables, mature (16-year-old) Fino 49 lemon trees (Citrus limon (L.) Burm. fil. grafted on Citrus macrophylla Wester) were exposed to three irrigation treatments: control (irrigated with 100% of crop potential evapotranspiration, ETc), deficit irrigation (DI) and partial rootzone drying (PRD) treatments, which received 75% ETc during the period of highest evaporative demand and 50% ETc otherwise. Furthermore, to assess the physiological significance of root-to-shoot ABA signalling, the seasonal dynamics of leaf xylem ABA concentration ([X-ABA](leaf)) were evaluated over two soil wetting-drying cycles during a 2-week period in summer. Although stomatal conductance (g(s)) declined with increased leaf-to-air vapour pressure deficit (LAVPD), lower leaf water potential and soil water availability, [X-ABA](leaf) was only related to stomatal closure in well irrigated trees under moderate (<2.5 kPa) atmospheric vapour pressure deficit (VPD). Differences in [X-ABA](leaf) were not detected between treatments either before or immediately after (<12 h) rewatering the dry side of PRD trees. Leaf water potential was higher in control trees, but decreased similarly in all irrigation treatments as daily LAVPD increased. In contrast, DI and PRD trees showed lower stomatal sensitivity to LAVPD than control trees. Although DI and PRD decreased stomatal conductance and photosynthesis, these treatments did not significantly decrease yield, but PRD increased crop water use efficiency (WUE) by 83% compared with control trees. Thus PRD-induced enhancement of crop WUE in a semiarid environment seems to involve physiological mechanisms other than increased [X-ABA](leaf).",

keywords = "deficit irrigation, leaf-to-air vapour pressure deficit , stomatal conductance",

author = "Perez-Perez, {J. G.} and Dodd, {I. C.} and P. Botia",

year = "2012",

doi = "10.1071/FP11269",

language = "English",

volume = "39",

pages = "366--378",

journal = "Functional Plant Biology",

issn = "1445-4408",

publisher = "CSIRO PUBLISHING",

number = "5",

}

RIS

TY - JOUR

T1 - Partial rootzone drying increases water-use efficiency of lemon Fino 49 trees independently of root-to-shoot ABA signalling

AU - Perez-Perez, J. G.

AU - Dodd, I. C.

AU - Botia, P.

PY - 2012

Y1 - 2012

N2 - To determine whether irrigation strategy altered the sensitivity of Citrus leaf gas exchange to soil, plant and atmospheric variables, mature (16-year-old) Fino 49 lemon trees (Citrus limon (L.) Burm. fil. grafted on Citrus macrophylla Wester) were exposed to three irrigation treatments: control (irrigated with 100% of crop potential evapotranspiration, ETc), deficit irrigation (DI) and partial rootzone drying (PRD) treatments, which received 75% ETc during the period of highest evaporative demand and 50% ETc otherwise. Furthermore, to assess the physiological significance of root-to-shoot ABA signalling, the seasonal dynamics of leaf xylem ABA concentration ([X-ABA](leaf)) were evaluated over two soil wetting-drying cycles during a 2-week period in summer. Although stomatal conductance (g(s)) declined with increased leaf-to-air vapour pressure deficit (LAVPD), lower leaf water potential and soil water availability, [X-ABA](leaf) was only related to stomatal closure in well irrigated trees under moderate (<2.5 kPa) atmospheric vapour pressure deficit (VPD). Differences in [X-ABA](leaf) were not detected between treatments either before or immediately after (<12 h) rewatering the dry side of PRD trees. Leaf water potential was higher in control trees, but decreased similarly in all irrigation treatments as daily LAVPD increased. In contrast, DI and PRD trees showed lower stomatal sensitivity to LAVPD than control trees. Although DI and PRD decreased stomatal conductance and photosynthesis, these treatments did not significantly decrease yield, but PRD increased crop water use efficiency (WUE) by 83% compared with control trees. Thus PRD-induced enhancement of crop WUE in a semiarid environment seems to involve physiological mechanisms other than increased [X-ABA](leaf).

AB - To determine whether irrigation strategy altered the sensitivity of Citrus leaf gas exchange to soil, plant and atmospheric variables, mature (16-year-old) Fino 49 lemon trees (Citrus limon (L.) Burm. fil. grafted on Citrus macrophylla Wester) were exposed to three irrigation treatments: control (irrigated with 100% of crop potential evapotranspiration, ETc), deficit irrigation (DI) and partial rootzone drying (PRD) treatments, which received 75% ETc during the period of highest evaporative demand and 50% ETc otherwise. Furthermore, to assess the physiological significance of root-to-shoot ABA signalling, the seasonal dynamics of leaf xylem ABA concentration ([X-ABA](leaf)) were evaluated over two soil wetting-drying cycles during a 2-week period in summer. Although stomatal conductance (g(s)) declined with increased leaf-to-air vapour pressure deficit (LAVPD), lower leaf water potential and soil water availability, [X-ABA](leaf) was only related to stomatal closure in well irrigated trees under moderate (<2.5 kPa) atmospheric vapour pressure deficit (VPD). Differences in [X-ABA](leaf) were not detected between treatments either before or immediately after (<12 h) rewatering the dry side of PRD trees. Leaf water potential was higher in control trees, but decreased similarly in all irrigation treatments as daily LAVPD increased. In contrast, DI and PRD trees showed lower stomatal sensitivity to LAVPD than control trees. Although DI and PRD decreased stomatal conductance and photosynthesis, these treatments did not significantly decrease yield, but PRD increased crop water use efficiency (WUE) by 83% compared with control trees. Thus PRD-induced enhancement of crop WUE in a semiarid environment seems to involve physiological mechanisms other than increased [X-ABA](leaf).

KW - deficit irrigation

KW - leaf-to-air vapour pressure deficit

KW - stomatal conductance

U2 - 10.1071/FP11269

DO - 10.1071/FP11269

M3 - Journal article

VL - 39

SP - 366

EP - 378

JO - Functional Plant Biology

JF - Functional Plant Biology

SN - 1445-4408

IS - 5

ER -

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