Long-distance ABA Signaling and Its Relation to Other Signaling Pathways in the Detection of Soil Drying and the Mediation of the Plant’s Response to Drought

By W. Davies, G. Kudoyarova, W. Hartung. Journal of Plant Growth Regulation, 2005

387 citations recorded by the source corpus.

In this article we review evidence for a variety of long-distance signaling pathways involving hormones and nutrient ions moving in the xylem sap. We argue that ABA has a central role to play, at least in root-to-shoot drought stress signaling and the regulation of functioning, growth, and development of plants in drying soil. We also stress the importance of changes in the pH of the leaf cell apoplast as influenced both by edaphic and climatic variation, as a regulator of shoot growth and functioning, and we show how changes in xylem and apoplastic pH can affect the way in which ABA regulates stomatal behavior and growth. The sensitivity to drought of the pH/ABA sensing and signaling mechanism is emphasized. This allows regulation of plant growth, development and functioning, and particularly shoot water status, as distinct from stress lesions in growth and other processes as a reaction to perturbations such as soil drying.

Subfields: Molecular Biology, Plant Science

View Paper: https://www.semanticscholar.org/paper/438d1d8a335f20c0c4afe681ddd32b516750ca67

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Citations in the corpus

Phenotyping approaches for physiological breeding and gene discovery in wheat (2009, neutral): “The fact that plants are continually sensing their environment and modifying their growth response through signalling (Davies et al., 2005; Brenner et al., 2006) reinforces the observation that populations with a large range of anthesis date are confounded by the range of ‘pheno-environments’.”
Cytokinin signaling networks. (2012, background): “Cytokinin deprivation in shoots under the stressed conditions may be due to IPT1,3,5 repression and/or CKX1,3,6 activation in Arabidopsis (95) (Figure 4) and decreased transport of root-borne cytokinins in the xylem (24).”
Cytokinin producing bacteria enhance plant growth in drying soil (2007, background): “Since applied cytokinins have been shown to promote stomatal opening, a decline in their content should restrict potentially damaging foliar water loss by favouring stomatal closure, probably by acting in concert with accumulated abscisic acid (ABA) ( Davies et al. 2005 ).”
Mechanisms of salinity tolerance. (2008, background): “drying soil (26), as evidenced by stomatal clo-”
Grapevine under deficit irrigation: hints from physiological and molecular data. (2010, background): “Moreover, a great deal of evidence highlights the importance of ABA as a root-sourced signal transported via the xylem and involved in stomatal regulation of droughted plants (reviewed by Dodd et al., 1996, 2006; Wilkinson and Davies, 2002; Davies et al., 2005).”
Deficit irrigation in grapevine improves water‐use efficiency while controlling vigour and production quality (2007, background): “, 2000) as well as a reduction of cytokinins (Stoll et al., 2000; Davies et al., 2005).”
Interplay between reactive oxygen species and hormones in the control of plant development and stress tolerance. (2015, background): “Currently, hormones such as ABA and ET are widely considered to be mediators of long-distance signalling in response to drought, nutrient deprivation, and submergence stress (Forde, 2002; Davies et al., 2005; Jackson, 2008).”
Chemical root to shoot signaling under drought. (2008, background): “Strong conclusions about cytokinin content are premature because the complexity of the cytokinin profiles has notbeenfullyexplored[ 64 ].Inarecentstudyonmaize[65], we found a decrease in Z and ZR concentrations in xylem sap coming from roots of drought stressed plants as compared to well watered con”
Phytohormones Regulate Accumulation of Osmolytes Under Abiotic Stress (2019, background): “For instance, concentration and transport of trans-zeatin riboside decreased the ABA concentration, which drastically increased in drought stress [242,243].”
Plant Responses to Salt Stress: Adaptive Mechanisms (2017, background): “Other authors have reported that stomatal responses to different abiotic stress are probably regulated by root signals, as occurs in drying and re-wetting soils [143,144].”
Review: the interaction between rootstocks and cultivars (Vitis vinifera L.) to enhance drought tolerance in grapevine (2014, background): “Many mechanisms for stomatal regulation have been postulated, such as changes in hydraulic conductivity (Schultz 2003, Christmann et al. 2007), abscisic acid synthesis (Davies et al. 2005, Dodd 2005, Jiang and Hartung 2008) and alkalinisation of the xylem pH (Davies et al. 2002, 2005).”
Review Article:Root development in horticultural plants grown under abiotic stress conditions – a review (2011, background): “Several authors (Davies et al., 2005; Hund et al., 2009; Sangakkara et al., 2010) have shown that this root signal is due to the development of higher ABA concentrations in the xylem.”