Enhancing Arabidopsis Salt and Drought Stress Tolerance by Chemical Priming for Its Abscisic Acid Responses

Jakab, Gábor; Ton, Jurriaan; Flors, Vı́ctor; Zimmerli, Laurent; Métraux, Jean Pierre; Mauch‐Mani, Brigitte

doi:10.1104/pp.105.065698

Cited by 384 publications

(270 citation statements)

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“…The control plants revealed increased ABA accumulation 14 d after salt stress, as expected, but no such increase was observed in the N-NH 4 + plants upon salt stress. These initial ABA accumulations suggest that the resistance induced by NH 4 + treatment could be mediated by this hormone, which plays a role in defense signaling in osmotic and salt stresses (Jakab et al, 2005). The basal SA levels did not differ between the control and the NH 4 + -treated plants before salinity, but ranged between 25 ng g -1 and 38 ng g -1 FW (Fig.…”

Section: Nh 4 + Treatment Induces the Main Hormone Signaling Pathwaysmentioning

confidence: 82%

“…Some quemical inducers are 2,6-dichloro isonicotinic acid (INA), benzo-(1,2,3)-thiadiazole-7-carbotionic acid S-methyl ester (BTH), β-aminobutyric acid (BABA) (Oostendorp et al, 2001;Conrath et al, 2002) and hexanoic acid, which by root treatment protects tomato plants and Arabidopsis against Botrytis cinerea (Vicedo et al, 2009;Kravchuk et al, 2011). Regarding abitotic stress, BABA has been shown to confer plant protection against salinity and drought (Jakab et al, 2005;Macarisin et al, 2009). Moreover, stress can also boost plant stress tolerance through induction of acclimation responses.…”

Section: Introductionmentioning

confidence: 99%

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Ammonium enhances resistance to salinity stress in citrus plants

Fernández-Crespo

Camañes

García‐Agustín

2012

Journal of Plant Physiology

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In this work, we demonstrate that NH 4 + nutrition in citrange Carrizo plants acts as an inducer of resistance against salinity conditions. We investigated its mode of action and provide evidence that NH 4 + confers resistance by priming abscisic acid and polyamines, just as enhancing H 2 O 2 and proline basal content. Moreover it observed a diminished Cl -uptake as well as an enhanced PHGPx expression after salt stress. Control and N-NH 4 + plants have shown optimal growth, however it was observed that N-NH 4 + plants have displayed greater dry weight and total lateral roots than control plants, but that differences are not seen for primary roots length. Our results reveal that N-NH 4 + treatment induces a similar phenotypical response to the recent stress-induced morphogenetic response (SIMRs). The hypothesis is that N-NH 4 + treatment triggers mild chronic stress in citrange Carrizo plants, which might explain the SIMR observed. Moreover, we observed modulators of stress signaling, such as H 2 O 2 in N-NH 4 + plants, which could acts as an intermediary between stress and the development of the SIMR phenotype. This observation suggests that NH 4 + treatments induce a mild stress condition that primes the citrange Carrizo defense response by stress imprinting and confers protection against a subsequent salt stress.

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Section: Nh 4 + Treatment Induces the Main Hormone Signaling Pathwaysmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Ammonium enhances resistance to salinity stress in citrus plants

Fernández-Crespo

Camañes

García‐Agustín

2012

Journal of Plant Physiology

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“…Thus, it has been demonstrated that transgenic plants producing high levels of ABA display improved growth under drought stress than wild type (Iuchi et al, 2001;Qin and Zeevaart, 2002). Priming of ABA biosynthesis can be obtained by direct overexpression of 9-cis-epoxycarotenoid dioxygenase, a key enzyme in the biosynthetic pathway (Iuchi et al, 2001;Qin and Zeevaart, 2002), or through the use of chemicals that accelerate ABA accumulation (Jakab et al, 2005). Alternatively, mutants affected in ABA signal transduction might also show an enhanced ABA response leading to stress-tolerant phenotypes.…”

Section: Discussionmentioning

confidence: 99%

Enhancement of Abscisic Acid Sensitivity and Reduction of Water Consumption in Arabidopsis by Combined Inactivation of the Protein Phosphatases Type 2C ABI1 and HAB1

et al. 2006

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Abscisic acid (ABA) plays a key role in plant responses to abiotic stress, particularly drought stress. A wide number of ABAhypersensitive mutants is known, however, only a few of them resist/avoid drought stress. In this work we have generated ABA-hypersensitive drought-avoidant mutants by simultaneous inactivation of two negative regulators of ABA signaling, i.e. the protein phosphatases type 2C (PP2Cs) ABA-INSENSITIVE1 (ABI1) and HYPERSENSITIVE TO ABA1 (HAB1). Two new recessive loss-of-function alleles of ABI1, abi1-2 and abi1-3, were identified in an Arabidopsis (Arabidopsis thaliana) T-DNA collection. These mutants showed enhanced responses to ABA both in seed and vegetative tissues, but only a limited effect on plant drought avoidance. In contrast, generation of double hab1-1 abi1-2 and hab1-1 abi1-3 mutants strongly increased plant responsiveness to ABA. Thus, both hab1-1 abi1-2 and hab1-1 abi1-3 were particularly sensitive to ABA-mediated inhibition of seed germination. Additionally, vegetative responses to ABA were reinforced in the double mutants, which showed a strong hypersensitivity to ABA in growth assays, stomatal closure, and induction of ABA-responsive genes. Transpirational water loss under drought conditions was noticeably reduced in the double mutants as compared to single parental mutants, which resulted in reduced water consumption of whole plants. Taken together, these results reveal cooperative negative regulation of ABA signaling by ABI1 and HAB1 and suggest that fine tuning of ABA signaling can be attained through combined action of PP2Cs. Finally, these results suggest that combined inactivation of specific PP2Cs involved in ABA signaling could provide an approach for improving crop performance under drought stress conditions.

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“…Although BABA-IR against Pseudomonas syringae depends solely on SA and NPR1 (15), against pathogenic fungi and oomycetes it is controlled by a pathway that involves abscisic acid-and phosphoinositidedependent signaling (16,17). BABA-IR is effective against biotrophic and necrotrophic pathogens, as well as certain types of abiotic stress (14)(15)(16)(17)(18)(19)(20).…”

mentioning

confidence: 99%

Costs and benefits of priming for defense in Arabidopsis

Hulten

Pelser

Loon

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

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722

584

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Induced resistance protects plants against a wide spectrum of diseases; however, it can also entail costs due to the allocation of resources or toxicity of defensive products. The cellular defense responses involved in induced resistance are either activated directly or primed for augmented expression upon pathogen attack. Priming for defense may combine the advantages of enhanced disease protection and low costs. In this study, we have compared the costs and benefits of priming to those of induced direct defense in Arabidopsis. In the absence of pathogen infection, chemical priming by low doses of ␤-aminobutyric acid caused minor reductions in relative growth rate and had no effect on seed production, whereas induction of direct defense by high doses of ␤-aminobutyric acid or benzothiadiazole strongly affected both fitness parameters. These costs were defense-related, because the salicylic acid-insensitive defense mutant npr1-1 remained unaffected by these treatments. Furthermore, the constitutive priming mutant edr1-1 displayed only slightly lower levels of fitness than wild-type plants and performed considerably better than the constitutively activated defense mutant cpr1-1. Hence, priming involves less fitness costs than induced direct defense. Upon infection by Pseudomonas syringae or Hyaloperonospora parasitica, priming conferred levels of disease protection that almost equaled the protection in benzothiadiazole-treated wild-type plants and cpr1 plants. Under these conditions, primed plants displayed significantly higher levels of fitness than noninduced plants and plants expressing chemically or cpr1-induced direct defense. Collectively, our results indicate that the benefits of priming-mediated resistance outweigh the costs in environments in which disease occurs.induced resistance ͉ innate immunity ͉ plant defense

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Enhancing Arabidopsis Salt and Drought Stress Tolerance by Chemical Priming for Its Abscisic Acid Responses

Cited by 384 publications

References 58 publications

Ammonium enhances resistance to salinity stress in citrus plants

Ammonium enhances resistance to salinity stress in citrus plants

Enhancement of Abscisic Acid Sensitivity and Reduction of Water Consumption in Arabidopsis by Combined Inactivation of the Protein Phosphatases Type 2C ABI1 and HAB1

Costs and benefits of priming for defense in Arabidopsis

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