Interactions between abscisic acid and other hormones

Hussain, Saad Abdulrahman; Gomes, Malaika Maraya; Yano, Kentarô; Nambara, Eiji

doi:10.1016/bs.abr.2019.09.001

Cited by 15 publications

(16 citation statements)

References 141 publications

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“…The SA content was also lowered but primarily in the drought-sensitive cultivar Chardonnay. Although most studies showed that JA and SA are involved in drought stress responses in addition to ABA [30], the negative interaction of ABA with JA and SA has also been reported previously [31,32]. Multiple nodes allow interference of ABA with the JAethylene pathway [33], but whether their interaction is antagonistic [33] or synergistic [34] strongly depends on the conditions.…”

Section: Phytohormonesmentioning

confidence: 90%

Responses to drought stress modulate the susceptibility to Plasmopara viticola in grapevine

Heyman

Chrysargyris

Demeestere

et al. 2020

Preprint

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BackgroundClimate change will increase the occurrence of plants being simultaneously subjected to drought and pathogen stress. Although it is well known that drought can alter the way in which plants respond to pathogens, knowledge about the effect of concurrent drought and biotic stress on grapevine is scarce. This is especially true for Plasmopara viticola, the causal agent of grapevine downy mildew. This research addresses how vines with different drought tolerances respond to challenge with P. viticola, drought stress or their combination and how one stress affects the other.ResultsArtificial inoculation was performed on two cultivars exposed to full or deficit irrigation in the Mediterranean climate of Cyprus. In parallel, leaf discs from these plants were inoculated under controlled conditions. Leaves were sampled at an early infection stage to determine the influence of the single and combined stresses on oxidative parameters, chlorophyll, and phytohormones. Under irrigation, the local Cypriot cultivar Xynisteri was more susceptible to P. viticola than the drought-sensitive cultivar Chardonnay. Successful infection by P. viticola at 1.5 days post inoculation was associated with high levels of indole-3-acetic acid (IAA), salicylic acid (SA), jasmonic acid (JA), and proline and strong decreases in antioxidant enzyme activity. Drought, on the other hand, triggered the accumulation of IAA and abscisic acid (ABA), which antagonized JA and SA. Exposure to drought stress increased the susceptibility to P. viticola of the leaves inoculated under controlled conditions. Conversely, both cultivars showed resistance against P. viticola when inoculated in planta under continued deficit irrigation. Despite their resistance, the pathogen-associated responses of IAA, antioxidant enzyme activity, and proline still occurred in these drought-stressed plants. Surprisingly, ABA, rather than the generally implicated JA and SA, seemed to play a prominent role in this resistance.ConclusionsDrought exposure increased the susceptibility of leaves inoculated in vitro. Conversely, deficit irrigation induced resistance to P. viticola in both Chardonnay and Xynisteri plants inoculated in planta. ABA, rather than JA and SA, was implicated in this resistance. The irrigation-dependent susceptibility indicates that the changing climate and the practices used to mitigate its effects may have a profound impact on plant pathogens.

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Section: Phytohormonesmentioning

confidence: 90%

Responses to drought stress modulate the susceptibility to Plasmopara viticola in grapevine

Heyman

Chrysargyris

Demeestere

et al. 2020

Preprint

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“…This ABA-ethylene interaction also plays a major role in regulating local growth responses. In terms of molecular mechanisms, ABA regulates ethylene biosynthesis via multiple different pathways, including transcriptional and post-translational regulations [ 163 ]. For example, ABA can inhibit ethylene biosynthesis through ABI4.…”

Section: Discussionmentioning

confidence: 99%

Role of Basal ABA in Plant Growth and Development

Brookbank

Patel

Gazzarrini

et al. 2021

Genes

Self Cite

112

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Abscisic acid (ABA) regulates various aspects of plant physiology, including promoting seed dormancy and adaptive responses to abiotic and biotic stresses. In addition, ABA plays an im-portant role in growth and development under non-stressed conditions. This review summarizes phenotypes of ABA biosynthesis and signaling mutants to clarify the roles of basal ABA in growth and development. The promotive and inhibitive actions of ABA in growth are characterized by stunted and enhanced growth of ABA-deficient and insensitive mutants, respectively. Growth regulation by ABA is both promotive and inhibitive, depending on the context, such as concentrations, tissues, and environmental conditions. Basal ABA regulates local growth including hyponastic growth, skotomorphogenesis and lateral root growth. At the cellular level, basal ABA is essential for proper chloroplast biogenesis, central metabolism, and expression of cell-cycle genes. Basal ABA also regulates epidermis development in the shoot, by inhibiting stomatal development, and deposition of hydrophobic polymers like a cuticular wax layer covering the leaf surface. In the root, basal ABA is involved in xylem differentiation and suberization of the endodermis. Hormone crosstalk plays key roles in growth and developmental processes regulated by ABA. Phenotypes of ABA-deficient and insensitive mutants indicate prominent functions of basal ABA in plant growth and development.

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“…The SA content was only significantly affected in the drought-sensitive cultivar Chardonnay during prolonged drought stress. Although many studies have shown that JA and SA are involved in drought stress responses in addition to ABA [ 36 ], negative interactions of ABA with JA and SA have also been reported [ 37 , 38 ]. ABA can interfere with the JA-ethylene pathway in multiple ways [ 39 ], but whether the interaction is antagonistic [ 39 ] or synergistic [ 40 ] strongly depends on the conditions.…”

Section: Discussionmentioning

confidence: 99%

Responses to Drought Stress Modulate the Susceptibility to Plasmopara viticola in Vitis vinifera Self-Rooted Cuttings

Heyman

Chrysargyris

Demeestere

et al. 2021

Plants

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Climate change will increase the occurrence of plants being simultaneously subjected to drought and pathogen stress. Drought can alter the way in which plants respond to pathogens. This research addresses how grapevine responds to the concurrent challenge of drought stress and Plasmopara viticola, the causal agent of downy mildew, and how one stress affects the other. Self-rooted cuttings of the drought-tolerant grapevine cultivar Xynisteri and the drought-sensitive cultivar Chardonnay were exposed to full or deficit irrigation (40% of full irrigation) and artificially inoculated with P. viticola in vitro or in planta. Leaves were sampled at an early infection stage to determine the influence of the single and combined stresses on oxidative parameters, chlorophyll, and phytohormones. Under full irrigation, Xynisteri was more susceptible to P. viticola than the drought-sensitive cultivar Chardonnay. Drought stress increased the susceptibility of grapevine leaves inoculated in vitro, but both cultivars showed resistance against P. viticola when inoculated in planta. Abscisic acid, rather than jasmonic acid and salicylic acid, seemed to play a prominent role in this resistance. The irrigation-dependent susceptibility observed in this study indicates that the practices used to mitigate the effects of climate change may have a profound impact on plant pathogens.

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Interactions between abscisic acid and other hormones

Cited by 15 publications

References 141 publications

Responses to drought stress modulate the susceptibility to Plasmopara viticola in grapevine

Responses to drought stress modulate the susceptibility to Plasmopara viticola in grapevine

Role of Basal ABA in Plant Growth and Development

Responses to Drought Stress Modulate the Susceptibility to Plasmopara viticola in Vitis vinifera Self-Rooted Cuttings

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