K+ starvation inhibits water-stress-induced stomatal closure via ethylene synthesis in sunflower plants

Benlloch-González, María; Romera, Francisco J.; Cristescu, Simona M.; Harren, F.J.M.; Fournier, José M.; Benlloch, M.

doi:10.1093/jxb/erp379

Cited by 87 publications

(49 citation statements)

References 43 publications

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“…Studies in greenhouses and with potted plants have demonstrated the importance of K supply in the resistance of plants to drought. K plays many fundamental physiological and metabolic roles in terrestrial plants in relation to water economy and osmotic homeostasis, such as maintenance of cellular turgor and osmotic pressure (Ashraf et al, 2002;Levi et al, 2011), control of water conductance and transpiration (Harvey & van den Driessche, 1999;Arquero et al, 2006;Benlloch-González et al, 2010), improvement of root hydraulic conductivity (El-Mesbahi et al, 2012), regulation of sap flow (Oddo et al, 2011), regulation of membrane potentials (Schroeder & Fang, 1991), stomatal control (Talbott & Zeiger, 1996;Benlloch-González et al, 2010) and maintenance of ionic homeostasis or transmembrane potential (Su et al, 2001;Waraich et al, 2011). Moreover, field studies have observed that K, apart from its role in stomatal control and water conductance, can further affect water economy as an osmolyte (Babita et al, 2010;Levi et al, 2011) directly linked to improving the capacity to retain water (Nandwal et al, 1998;Rao et al, 2012).…”

Section: Box 1 Main Ecophysiological Roles Of Kmentioning

confidence: 99%

Potassium: a neglected nutrient in global change

Sardans

Peñuelas

2015

Global Ecology and Biogeography

441

283

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Aim Potassium (K) is the second most abundant nutrient in plant photosynthetic tissues after nitrogen (N). Thousands of physiological and metabolic studies in recent decades have established the fundamental role of K in plant function, especially in water-use efficiency and economy, and yet macroecological studies have mostly overlooked this nutrient. MethodsWe have reviewed available studies on the content, stoichiometry and roles of K in the soil-plant system and in terrestrial ecosystems. We have also reviewed the impacts of global change drivers on K content, stoichiometry and roles. ConclusionsThe current literature indicates that K, at a global level, is as limiting as N and phosphorus (P) for plant productivity in terrestrial ecosystems. Some degree of K limitation has been seen in up to 70% of all studied terrestrial ecosystems. However, in some areas atmospheric K deposition from human activities is greater than that from natural sources. We are far from understanding the K fluxes between the atmosphere and land, and the role of anthropogenic activities in these fluxes. The increasing aridity expected in wide areas of the world makes K more critical through its role in water-use efficiency. N deposition exerts a strong impact on the ecosystem K cycle, decreasing K availability and increasing K limitation. Plant invasive success is enhanced by higher soil K availability, especially in environments without strong abiotic stresses. The impacts of other drivers of global change, such as increasing atmospheric CO2 or changes in land use, remain to be elucidated. Current models of the responses of ecosystems and carbon storage to projected global climatic and atmospheric changes are now starting to consider N and P, but they should also consider K, mostly in arid and semi-arid ecosystems.

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Section: Box 1 Main Ecophysiological Roles Of Kmentioning

confidence: 99%

Potassium: a neglected nutrient in global change

Sardans

Peñuelas

2015

Global Ecology and Biogeography

441

283

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“…Ethylene is known to regulate stomatal movement, but its effect on stomatal movement is contradictory (Acharya and Assmann, 2009;Wilkinson and Davies, 2010). Some studies reveal that ethylene induces stomatal opening and prevents abscisic acid (ABA) -or some stresses -triggered stomatal closure (Levitt et al, 1987;Tanaka et al, 2005Tanaka et al, , 2006Wilkinson and Davies, 2009;Benlloch-Gonz alez et al, 2010), whereas other studies show that it triggers closure (Tissera and Ayres, 1986;Young et al, 2004). Although the stomatal responses to ethylene are well studied, the underlying signal transduction pathways are not well known.…”

Section: Introductionmentioning

confidence: 99%

Heterotrimeric G protein mediates ethylene‐induced stomatal closure via hydrogen peroxide synthesis in Arabidopsis

Cai

Lei

et al. 2015

The Plant Journal

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These authors contributed equally to this work. SUMMARYHeterotrimeric G proteins function as key players in hydrogen peroxide (H 2 O 2 ) production in plant cells, but whether G proteins mediate ethylene-induced H 2 O 2 production and stomatal closure are not clear. Here, evidences are provided to show the Ga subunit GPA1 as a missing link between ethylene and H 2 O 2 in guard cell ethylene signalling. In wild-type leaves, ethylene-triggered H 2 O 2 synthesis and stomatal closure were dependent on activation of Ga. GPA1 mutants showed the defect of ethylene-induced H 2 O 2 production and stomatal closure, whereas wGa and cGa overexpression lines showed faster stomatal closure and H 2 O 2 production in response to ethylene. Ethylene-triggered H 2 O 2 generation and stomatal closure were impaired in RAN1, ETR1, ERS1 and EIN4 mutants but not impaired in ETR2 and ERS2 mutants. Ga activator and H 2 O 2 rescued the defect of RAN1 and EIN4 mutants or etr1-3 in ethylene-induced H 2 O 2 production and stomatal closure, but only rescued the defect of ERS1 mutants or etr1-1 and etr1-9 in ethylene-induced H 2 O 2 production. Stomata of CTR1 mutants showed constitutive H 2 O 2 production and stomatal closure, but which could be abolished by Ga inhibitor. Stomata of EIN2, EIN3 and ARR2 mutants did not close in responses to ethylene, Ga activator or H 2 O 2 , but do generate H 2 O 2 following challenge of ethylene or Ga activator. The data indicate that Ga mediates ethylene-induced stomatal closure via H 2 O 2 production, and acts downstream of RAN1, ETR1, ERS1, EIN4 and CTR1 and upstream of EIN2, EIN3 and ARR2. The data also show that ETR1 and ERS1 mediate both ethylene and H 2 O 2 signalling in guard cells.

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“…Although the role of ethylene in stomatal behaviour has been suggested, its effect in this process seems rather contradictory (Acharya & Assmann 2009;Wilkinson & Davies 2010). In some species, ethylene induces stomatal opening and/or inhibits ABA-induced stomatal closure, or induces stomatal sensitivity to stresses/cues in which ABA is the normal signal for the given stomatal response (Madhavan et al 1983;Levitt et al 1987;Merritt et al 2001;Mills et al 2009;Benlloch-Gonza´lez et al 2010), whereas in other species it induces closure (Pallas & Kays 1982;Giulivo 1986;Tissera & Ayres 1986;Gunderson & Taylor 1991;Young et al 2004;Desikan et al 2006;He et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Ethylene inhibits abscisic acid-induced stomatal closure inVicia fabavia reducing nitric oxide levels in guard cells

She

Song

2012

New Zealand Journal of Botany

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The relationship between nitric oxide (NO) reduction and the inhibition of abscisic acid (ABA)-induced stomatal closure by ethylene was analysed. ABA treatment induced NO production and stomatal closure, but ethylene inhibited the effects of ABA on these two parameters. Like 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO), a specific scavenger of NO, haemoglobin (Hb), the potent scavenger of NO/carbon monoxide (CO) and N G -nitro-LArg-methyl ester (L-NAME), an inhibitor of animal nitric oxide synthases (NOS; EC 1.14.13.39), both the ethylene-releasing compound 2-chloroethylene phosphonic acid (ethephon, ETH) and 1-aminocyclopropane-1-carboxylic acid (ACC), the immediate precursor of ethylene, were found to inhibit stomatal closure by ABA and to reduce NO levels by ABA in guard cells, indicating that the ethylene-caused inhibition of ABA-induced stomatal closure involves a decrease in NO levels in guard cells. In addition, and similar to cPTIO and Hb, ACC/ETH suppressed sodium nitroprusside (SNP)-induced stomatal closure and NO levels in guard cells treated with SNP in the light. ACC/ETH also reopened stomata that had been closed by ABA and reduced NO levels that had been generated by ABA, showing that ethylene causes NO removal in guard cells. However, the above-mentioned effect of ACC/ETH was dissimilar to that of L-NAME, which was incapable of reducing NO levels by SNP or abolishing NO that had been generated by ABA. We suggest that ethylene probably induces NO removal, thereby reducing NO levels in Vicia faba guard cells, and finally inhibits stomatal closure induced by ABA. Furthermore, the pattern of NO reduction caused by ethylene is also discussed.

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K+ starvation inhibits water-stress-induced stomatal closure via ethylene synthesis in sunflower plants

Cited by 87 publications

References 43 publications

Potassium: a neglected nutrient in global change

Potassium: a neglected nutrient in global change

Heterotrimeric G protein mediates ethylene‐induced stomatal closure via hydrogen peroxide synthesis in Arabidopsis

Ethylene inhibits abscisic acid-induced stomatal closure inVicia fabavia reducing nitric oxide levels in guard cells

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