ROS-mediated vascular homeostatic control of root-to-shoot soil Na delivery in<i>Arabidopsis</i>

Jiang, Caifu; Belfield, Eric J.; Mithani, Aziz; Visscher, Anne M.; Ragoussis, Jiannis; Mott, Richard; Smith, J. Andrew C.; Harberd, Nicholas P.

doi:10.1038/emboj.2012.273

Cited by 168 publications

(77 citation statements)

References 59 publications

(117 reference statements)

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“…The transcription factors that control enhanced AtHKT1;1 expression have yet to be determined. A genetic screen for soil salinity-sensitive ( sss ) mutants led to the isolation of the sss1-1 mutant, which showed strong Na + hypersensitivity in shoots [93]. The SSS1 locus encodes the AtrbohF protein, an NADPH oxidase catalyzing ROS production [93].…”

Section: Hkt As Major Player In Plant Salt Tolerance and Root-to-shoomentioning

confidence: 99%

“…A genetic screen for soil salinity-sensitive ( sss ) mutants led to the isolation of the sss1-1 mutant, which showed strong Na + hypersensitivity in shoots [93]. The SSS1 locus encodes the AtrbohF protein, an NADPH oxidase catalyzing ROS production [93]. Interestingly, the lack of AtrbohF in root pericycle and vascular parenchyma cells abolished salinity-induced ROS accumulation in the vasculature and caused Na + over-accumulation in shoots with increased Na + levels in xylem sap [93].…”

Section: Hkt As Major Player In Plant Salt Tolerance and Root-to-shoomentioning

confidence: 99%

“…The SSS1 locus encodes the AtrbohF protein, an NADPH oxidase catalyzing ROS production [93]. Interestingly, the lack of AtrbohF in root pericycle and vascular parenchyma cells abolished salinity-induced ROS accumulation in the vasculature and caused Na + over-accumulation in shoots with increased Na + levels in xylem sap [93]. AtrbohF-mediated ROS production might enhance AtHKT1;1- mediated Na + unloading from the xylem sap and, thus, protect leaves from salinity stress; however, more research is required to test this model or other possible mechanisms.…”

Section: Hkt As Major Player In Plant Salt Tolerance and Root-to-shoomentioning

confidence: 99%

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Plant salt-tolerance mechanisms

Deinlein

Stephan

Horie

et al. 2014

Trends in Plant Science

1,442

958

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Crop performance is severely affected by high salt concentrations in soils. To engineer more salt-tolerant plants it is crucial to unravel the key components of the plant salt tolerance network. Here we review our understanding of the core salt-tolerance mechanisms in plants. Recent studies have shown that stress sensing and signaling components may play important roles in regulating the plant salinity stress response. We also review key Na+ transport and detoxification pathways and the impact of epigenetic chromatin modifications on salinity tolerance. In addition, we discuss the progress that has been made toward engineering salt tolerance in crops, including marker assisted selection and gene stacking techniques. We also identify key open questions that remain to be addressed in the future.

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Section: Hkt As Major Player In Plant Salt Tolerance and Root-to-shoomentioning

confidence: 99%

Section: Hkt As Major Player In Plant Salt Tolerance and Root-to-shoomentioning

confidence: 99%

Section: Hkt As Major Player In Plant Salt Tolerance and Root-to-shoomentioning

confidence: 99%

See 1 more Smart Citation

Plant salt-tolerance mechanisms

Deinlein

Stephan

Horie

et al. 2014

Trends in Plant Science

1,442

958

View full text Add to dashboard Cite

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“…Due to its charge, this short-lived ROS is unable to passively cross the lipid bilayer and remains in the apoplast, where it is rapidly converted into another species, H 2 O 2 , either spontaneously or in a reaction catalyzed by the superoxide dismutase (SOD; Browning et al, 2012). The functions of plant NADPH oxidases stretch beyond stress responses and include roles in development (Sagi and Fluhr, 2006; Takeda et al, 2008), in sodium transport in the xylem sap (Jiang et al, 2012), and intriguingly also in long-distance (“systemic”) ROS signaling (Miller et al, 2009). In Arabidopsis wounding, heat stress, high light, and increased salinity result in RbohD-dependent systemic spread of the oxidative burst along the rosette leaves.…”

Section: Ros In the Apoplastmentioning

confidence: 99%

ROS-talk – how the apoplast, the chloroplast, and the nucleus get the message through

et al. 2012

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The production of reactive oxygen species (ROS) in different plant subcellular compartments is the hallmark of the response to many stress stimuli and developmental cues. The past two decades have seen a transition from regarding ROS as exclusively cytotoxic agents to being considered as reactive compounds which participate in elaborate signaling networks connecting various aspects of plant life. We have now arrived at a stage where it has become increasingly difficult to disregard the communication between different types and pools of ROS. Production of ROS in the extracellular space, the apoplast, can influence their generation in the chloroplast and both can regulate nuclear gene expression. In spite of existing information on these signaling events, we can still barely grasp the mechanisms of ROS signaling and communication between the organelles. In this review, we summarize evidence that supports the mutual influence of extracellular and chloroplastic ROS production on nuclear gene regulation and how this interaction might occur. We also reflect on how, and via which routes signals might reach the nucleus where they are ultimately integrated for transcriptional reprogramming. New ideas and approaches will be needed in the future to address the pressing questions of how ROS as signaling molecules can participate in the coordination of stress adaptation and development and how they are involved in the chatter of the organelles.

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“…A study with the Arabidopsis mutant atrbohF ( Arabidopsis thaliana respiratory burst oxidase protein F), showed that AtRbohF increases root vascular ROS levels in response to salinity, thereby reducing the amount of Na + in the xylem and, consequently, the amount of Na + exported to the shoots [78]. One hypothesis to explain the effect of AtRbohF on xylem Na + levels is that ROS stimulates AtHKT1;1 expression or activity, because AtHKT1;1 is involved in Na + unloading from the xylem (Figure 1) [6,12,19,21,49].…”

Section: Hkt Regulationmentioning

confidence: 99%

HKT Transporters—State of the Art

Almeida

Katschnig

Boer

2013

IJMS

111

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The increase in soil salinity poses a serious threat to agricultural yields. Under salinity stress, several Na+ transporters play an essential role in Na+ tolerance in plants. Amongst all Na+ transporters, HKT has been shown to have a crucial role in both mono and dicotyledonous plants in the tolerance to salinity stress. Here we present an overview of the physiological role of HKT transporters in plant Na+ homeostasis. HKT regulation and amino acids important to the correct function of HKT transporters are reviewed. The functions of the most recently characterized HKT members from both HKT1 and HKT2 subfamilies are also discussed. Topics that still need to be studied in future research (e.g., HKT regulation) as well as research suggestions (e.g., generation of HKT mutants) are addressed.

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ROS-mediated vascular homeostatic control of root-to-shoot soil Na delivery inArabidopsis

Cited by 168 publications

References 59 publications

Plant salt-tolerance mechanisms

Plant salt-tolerance mechanisms

ROS-talk – how the apoplast, the chloroplast, and the nucleus get the message through

HKT Transporters—State of the Art

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