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Physiological and gene expression responses of sunflower (Helianthus annuus L.) plants differ according to irrigation placement

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Physiological and gene expression responses of sunflower (Helianthus annuus L.) plants differ according to irrigation placement. / Aguado, Ana; Capote, Nieves; Romero, Fernando; Dodd, Ian C.; Colmenero-Flores, Jose M.

In: Plant Science, Vol. 227, 10.2014, p. 37-44.

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Aguado, Ana ; Capote, Nieves ; Romero, Fernando ; Dodd, Ian C. ; Colmenero-Flores, Jose M. / Physiological and gene expression responses of sunflower (Helianthus annuus L.) plants differ according to irrigation placement. In: Plant Science. 2014 ; Vol. 227. pp. 37-44.

Bibtex

@article{8d36f6afc7734c6cb6a6feeb8ff24ac0,
title = "Physiological and gene expression responses of sunflower (Helianthus annuus L.) plants differ according to irrigation placement",
abstract = "To investigate effects of soil moisture heterogeneity on plant physiology and gene expression in roots and leaves, three treatments were implemented in sunflower plants growing with roots split between two compartments: a control (C) treatment supplying 100% of plant evapotranspiration, and two treatments receiving 50% of plant evapotranspiration, either evenly distributed to both compartments (deficit irrigation - DI) or unevenly distributed to ensure distinct wet and dry compartments (partial rootzone drying - PRD). Plants receiving the same amount of water responded differently under the two irrigation systems. After 3 days, evapotranspiration was similar in C and DI, but 20% less in PRD, concomitant with decreased leaf water potential (Psi(leaf)) and increased leaf xylem ABA concentration. Six water-stress responsive genes were highly induced in roots growing in the drying soil compartment of PRD plants, and their expression was best correlated with local soil water content. On the other hand, foliar gene expression differed significantly from that of the root and correlated better with xylem ABA concentration and Psi(leaf). While the PRD irrigation strategy triggered stronger physiological and molecular responses, suggesting a more intense and systemic stress reaction due to local dehydration of the dry compartment of PRD plants, the DI strategy resulted in similar water savings without strongly inducing these responses. Correlating physiological and molecular responses in PRD/DI plants may provide insights into the severity and location of water deficits and may enable a better understanding of long-distance signalling mechanisms. (C) 2014 Elsevier Ireland Ltd. All rights reserved.",
keywords = "Deficit irrigation, Partial rootzone drying, Evapotranspiration, Leaf water potential, ABA, Gene expression, SOLANUM-LYCOPERSICON L., ABSCISIC-ACID, DEFICIT IRRIGATION, ROOT-ZONE, WATER-DEFICIT, SOIL-MOISTURE, ENCODING AQUAPORINS, DROUGHT-TOLERANT, OSMOTIC-STRESS, SAP FLOW",
author = "Ana Aguado and Nieves Capote and Fernando Romero and Dodd, {Ian C.} and Colmenero-Flores, {Jose M.}",
year = "2014",
month = oct,
doi = "10.1016/j.plantsci.2014.06.009",
language = "English",
volume = "227",
pages = "37--44",
journal = "Plant Science",
issn = "0168-9452",
publisher = "Elsevier Ireland Ltd",

}

RIS

TY - JOUR

T1 - Physiological and gene expression responses of sunflower (Helianthus annuus L.) plants differ according to irrigation placement

AU - Aguado, Ana

AU - Capote, Nieves

AU - Romero, Fernando

AU - Dodd, Ian C.

AU - Colmenero-Flores, Jose M.

PY - 2014/10

Y1 - 2014/10

N2 - To investigate effects of soil moisture heterogeneity on plant physiology and gene expression in roots and leaves, three treatments were implemented in sunflower plants growing with roots split between two compartments: a control (C) treatment supplying 100% of plant evapotranspiration, and two treatments receiving 50% of plant evapotranspiration, either evenly distributed to both compartments (deficit irrigation - DI) or unevenly distributed to ensure distinct wet and dry compartments (partial rootzone drying - PRD). Plants receiving the same amount of water responded differently under the two irrigation systems. After 3 days, evapotranspiration was similar in C and DI, but 20% less in PRD, concomitant with decreased leaf water potential (Psi(leaf)) and increased leaf xylem ABA concentration. Six water-stress responsive genes were highly induced in roots growing in the drying soil compartment of PRD plants, and their expression was best correlated with local soil water content. On the other hand, foliar gene expression differed significantly from that of the root and correlated better with xylem ABA concentration and Psi(leaf). While the PRD irrigation strategy triggered stronger physiological and molecular responses, suggesting a more intense and systemic stress reaction due to local dehydration of the dry compartment of PRD plants, the DI strategy resulted in similar water savings without strongly inducing these responses. Correlating physiological and molecular responses in PRD/DI plants may provide insights into the severity and location of water deficits and may enable a better understanding of long-distance signalling mechanisms. (C) 2014 Elsevier Ireland Ltd. All rights reserved.

AB - To investigate effects of soil moisture heterogeneity on plant physiology and gene expression in roots and leaves, three treatments were implemented in sunflower plants growing with roots split between two compartments: a control (C) treatment supplying 100% of plant evapotranspiration, and two treatments receiving 50% of plant evapotranspiration, either evenly distributed to both compartments (deficit irrigation - DI) or unevenly distributed to ensure distinct wet and dry compartments (partial rootzone drying - PRD). Plants receiving the same amount of water responded differently under the two irrigation systems. After 3 days, evapotranspiration was similar in C and DI, but 20% less in PRD, concomitant with decreased leaf water potential (Psi(leaf)) and increased leaf xylem ABA concentration. Six water-stress responsive genes were highly induced in roots growing in the drying soil compartment of PRD plants, and their expression was best correlated with local soil water content. On the other hand, foliar gene expression differed significantly from that of the root and correlated better with xylem ABA concentration and Psi(leaf). While the PRD irrigation strategy triggered stronger physiological and molecular responses, suggesting a more intense and systemic stress reaction due to local dehydration of the dry compartment of PRD plants, the DI strategy resulted in similar water savings without strongly inducing these responses. Correlating physiological and molecular responses in PRD/DI plants may provide insights into the severity and location of water deficits and may enable a better understanding of long-distance signalling mechanisms. (C) 2014 Elsevier Ireland Ltd. All rights reserved.

KW - Deficit irrigation

KW - Partial rootzone drying

KW - Evapotranspiration

KW - Leaf water potential

KW - ABA

KW - Gene expression

KW - SOLANUM-LYCOPERSICON L.

KW - ABSCISIC-ACID

KW - DEFICIT IRRIGATION

KW - ROOT-ZONE

KW - WATER-DEFICIT

KW - SOIL-MOISTURE

KW - ENCODING AQUAPORINS

KW - DROUGHT-TOLERANT

KW - OSMOTIC-STRESS

KW - SAP FLOW

U2 - 10.1016/j.plantsci.2014.06.009

DO - 10.1016/j.plantsci.2014.06.009

M3 - Journal article

VL - 227

SP - 37

EP - 44

JO - Plant Science

JF - Plant Science

SN - 0168-9452

ER -