scholarly journals Abscisic acid is essential for rewiring of jasmonic acid-dependent defenses during herbivory

2019 ◽  
Author(s):  
Irene A Vos ◽  
Adriaan Verhage ◽  
Lewis G Watt ◽  
Ido Vlaardingerbroek ◽  
Robert C Schuurink ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Jasmonic Acid ◽  
Plant Hormone ◽  
Pieris Rapae ◽  
Necrotrophic Pathogen ◽  
Plant Insect Interactions ◽  
Gcc Box ◽  
Insect Interactions ◽  
And Control

AbstractJasmonic acid (JA) is an important plant hormone in the regulation of defenses against chewing herbivores and necrotrophic pathogens. In Arabidopsis thaliana, the JA response pathway consists of two antagonistic branches that are regulated by MYC- and ERF-type transcription factors, respectively. The role of abscisic acid (ABA) and ethylene (ET) in the molecular regulation of the MYC/ERF antagonism during plant-insect interactions is still unclear. Here, we show that production of ABA induced in response to leaf-chewing Pieris rapae caterpillars is required for both the activation of the MYC-branch and the suppression of the ERF-branch during herbivory. Exogenous application of ABA suppressed ectopic ERF-mediated PDF1.2 expression in 35S::ORA59 plants. Moreover, the GCC-box promoter motif, which is required for JA/ET-induced activation of the ERF-branch genes ORA59 and PDF1.2, was targeted by ABA. Application of gaseous ET counteracted activation of the MYC-branch and repression of the ERF-branch by P. rapae, but infection with the ET-inducing necrotrophic pathogen Botrytis cinerea did not. Accordingly, P. rapae performed equally well on B. cinerea-infected and control plants, whereas activation of the MYC-branch resulted in reduced caterpillar performance. Together, these data indicate that upon feeding by P. rapae, ABA is essential for activating the MYC-branch and suppressing the ERF-branch of the JA pathway, which maximizes defense against caterpillars.

Global change effects on plant–insect interactions: the role of phytochemistry

2017 ◽  
Vol 23 ◽  
pp. 70-80 ◽  
Author(s):  
Mary A Jamieson ◽  
Laura A Burkle ◽  
Jessamyn S Manson ◽  
Justin B Runyon ◽  
Amy M Trowbridge ◽  
...  
Keyword(s):  
Global Change ◽  
Plant Insect Interactions ◽  
Insect Interactions

Regulation of seed dormancy by abscisic acid and DELAY OF GERMINATION 1

2015 ◽  
Vol 25 (2) ◽  
pp. 82-98 ◽  
Author(s):  
Bas J.W. Dekkers ◽  
Leónie Bentsink
Keyword(s):  
Abscisic Acid ◽  
Seed Dormancy ◽  
Plant Hormone ◽  
Complex Trait ◽  
Hormone Interactions ◽  
Physiological Dormancy ◽  
Recent Developments ◽  
Radicle Emergence ◽  
Dormancy Induction

AbstractPhysiological dormancy has been described as a physiological inhibiting mechanism that prevents radicle emergence. It can be caused by the embryo (embryo dormancy) as well as by the structures that cover the embryo. One of its functions is to time plant growth and reproduction to the most optimal season and therefore, in nature, dormancy is an important adaptive trait that is under selective pressure. Dormancy is a complex trait that is affected by many loci, as well as by an intricate web of plant hormone interactions. Moreover, it is strongly affected by a multitude of environmental factors. Its induction, maintenance, cycling and loss come down to the central paradigm, which is the balance between two key hormonal regulators, i.e. the plant hormone abscisic acid (ABA), which is required for dormancy induction, and gibberellins (GA), which are required for germination. In this review we will summarize recent developments in dormancy research (mainly) in the model plant Arabidopsis thaliana, focusing on two key players for dormancy induction, i.e. the plant hormone ABA and the DELAY OF GERMINATION 1 (DOG1) gene. We will address the role of ABA and DOG1 in relation to various aspects of seed dormancy, i.e. induction during seed maturation, loss during dry seed afterripening, the rehydrated state (including dormancy cycling) and the switch to germination.

scholarly journals Control of ABA Signaling and Crosstalk With Other Hormones by Selective Degradation of Pathway Components

2021 ◽  
Author(s):  
Agnieszka Sirko ◽  
Anna Wawrzyńska ◽  
Jerzy Brzywczy ◽  
Marzena Sieńko
Keyword(s):  
Abscisic Acid ◽  
Signaling Pathway ◽  
Plant Hormone ◽  
Aba Signaling ◽  
Degradation Mechanisms ◽  
E3 Ligases ◽  
Selective Autophagy ◽  
Selective Degradation ◽  
Different Parts

A rapid and appropriate genetic and metabolic acclimation, which is crucial for plants’ survival in a changing environment, is maintained due to the coordinated action of plant hormones and cellular degradation mechanisms influencing proteostasis. The plant hormone abscisic acid (ABA) rapidly accumulates in plants in response to environmental stress and plays a pivotal role in the reaction to various stimuli. Increasing evidence demonstrates a significant role of autophagy in controlling ABA signaling. This field has been extensively investigated and new discoveries are constantly being provided. We present updated information on the components of the ABA signaling pathway, particularly on transcription factors modified by different E3 ligases. Then, we focus on the role of selective autophagy in ABA pathway control and review novel evidence on the involvement of autophagy in different parts of the ABA signaling pathway that are important for crosstalk with other hormones, particularly cytokinins and brassinosteroids.

scholarly journals Control of ABA Signaling and Crosstalk with Other Hormones by the Selective Degradation of Pathway Components

2021 ◽  
Vol 22 (9) ◽  
pp. 4638
Author(s):  
Agnieszka Sirko ◽  
Anna Wawrzyńska ◽  
Jerzy Brzywczy ◽  
Marzena Sieńko
Keyword(s):  
Abscisic Acid ◽  
Signaling Pathway ◽  
Plant Hormone ◽  
Aba Signaling ◽  
Degradation Mechanisms ◽  
E3 Ligases ◽  
Selective Autophagy ◽  
Selective Degradation ◽  
Different Parts

A rapid and appropriate genetic and metabolic acclimation, which is crucial for plants’ survival in a changing environment, is maintained due to the coordinated action of plant hormones and cellular degradation mechanisms influencing proteostasis. The plant hormone abscisic acid (ABA) rapidly accumulates in plants in response to environmental stress and plays a pivotal role in the reaction to various stimuli. Increasing evidence demonstrates a significant role of autophagy in controlling ABA signaling. This field has been extensively investigated and new discoveries are constantly being provided. We present updated information on the components of the ABA signaling pathway, particularly on transcription factors modified by different E3 ligases. Then, we focus on the role of selective autophagy in ABA pathway control and review novel evidence on the involvement of autophagy in different parts of the ABA signaling pathway that are important for crosstalk with other hormones, particularly cytokinins and brassinosteroids.

scholarly journals Abscisic Acid as an Emerging Modulator of the Responses of Plants to Low Oxygen Conditions

2021 ◽  
Vol 12 ◽  
Author(s):  
Miguel González-Guzmán ◽  
Aurelio Gómez-Cadenas ◽  
Vicent Arbona
Keyword(s):  
Abscisic Acid ◽  
Plant Hormone ◽  
Negative Regulator ◽  
Plant Responses ◽  
Low Oxygen ◽  
Positive Role ◽  
Morphological Adaptations ◽  
Oxygen Conditions ◽  
Hyponastic Growth

Different environmental and developmental cues involve low oxygen conditions, particularly those associated to abiotic stress conditions. It is widely accepted that plant responses to low oxygen conditions are mainly regulated by ethylene (ET). However, interaction with other hormonal signaling pathways as gibberellins (GAs), auxin (IAA), or nitric oxide (NO) has been well-documented. In this network of interactions, abscisic acid (ABA) has always been present and regarded to as a negative regulator of the development of morphological adaptations to soil flooding: hyponastic growth, adventitious root emergence, or formation of secondary aerenchyma in different plant species. However, recent evidence points toward a positive role of this plant hormone on the modulation of plant responses to hypoxia and, more importantly, on the ability to recover during the post-hypoxic period. In this work, the involvement of ABA as an emerging regulator of plant responses to low oxygen conditions alone or in interaction with other hormones is reviewed and discussed.

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