Basic Protein Modules Combining Abscisic Acid and Light Signaling in Arabidopsis

Bulgakov, Victor P.; Koren, Olga G.

doi:10.3389/fpls.2021.808960

Cited by 15 publications

(5 citation statements)

References 94 publications

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“…It is clear that the influence of the HOS1 gene on ROS can be associated with various regulatory mechanisms, including both ABA signaling and cues from the light signaling system. The most promising for further study are the regulatory modules HOS1—‖ICE1—‖ABI5→ RbohD / F and HOS1—‖PIF4→ ABI5 → RbohD / F , which may have an overlap in ROS regulation via ABI5 function [ 48 ]. Similarly, the HOS1-RBOHD/F-ROS-ENO2-CBF signaling chain may explain how HOS1 activates plant cold response through ENOLASE2 (ENO2), given the recently discovered role of ENO2 in cold adaptation [ 49 ].…”

Section: Discussionmentioning

confidence: 99%

Suppression of the HOS1 Gene Affects the Level of ROS Depending on Light and Cold

Gorpenchenko

Veremeichik

Shkryl

et al. 2023

Life

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The E3 ubiquitin-protein ligase HOS1 is an important integrator of temperature information and developmental processes. HOS1 is a negative regulator of plant cold tolerance, and silencing HOS1 leads to increased cold tolerance. In the present work, we studied ROS levels in hos1Cas9 Arabidopsis thaliana plants, in which the HOS1 gene was silenced by disruption of the open reading frame via CRISPR/Cas9 technology. Confocal imaging of intracellular reactive oxygen species (ROS) showed that the hos1 mutation moderately increased levels of ROS under both low and high light (HL) conditions, but wild-type (WT) and hos1Cas9 plants exhibited similar ROS levels in the dark. Visualization of single cells did not reveal differences in the intracellular distribution of ROS between WT and hos1Cas9 plants. The hos1Cas9 plants contained a high basal level of ascorbic acid, maintained a normal balance between reduced and oxidized glutathione (GSH and GSSG), and generated a strong antioxidant defense response against paraquat under HL conditions. Under cold exposure, the hos1 mutation decreased the ROS level and substantially increased the expression of the ascorbate peroxidase genes Apx1 and Apx2. When plants were pre-exposed to cold and further exposed to HL, the expression of the NADPH oxidase genes RbohD and RbohF was increased in the hos1Cas9 plants but not in WT plants. hos1-mediated changes in the level of ROS are cold-dependent and cold-independent, which implies different levels of regulation. Our data indicate that HOS1 is required to maintain ROS homeostasis not only under cold conditions, but also under conditions of both low and high light intensity. It is likely that HOS1 prevents the overinduction of defense mechanisms to balance growth.

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Section: Discussionmentioning

confidence: 99%

Suppression of the HOS1 Gene Affects the Level of ROS Depending on Light and Cold

Gorpenchenko

Veremeichik

Shkryl

et al. 2023

Life

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“…Thus, the RY motif-binding protein remains to be identified. In angiosperms, the VP1/ABI3 proteins reportedly interact with other proteins to control the expression of specific genes 43 . For example, AtABI3 directly interacts with other proteins, such as the basic leucine zipper transcription factor abscisic acid insensitive 5 44 and basic helix-loop-helix transcription factor phytochrome-interacting factor 1/phytochrome-interacting factor 3-like 5 45 , and coordinates with those proteins to modify gene expression.…”

Section: Discussionmentioning

confidence: 99%

Cis-regulatory elements and transcription factors related to auxin signaling in the streptophyte algae Klebsormidium nitens

Tounosu,

Sesoko,

Hori

et al. 2023

Sci Rep

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The phytohormone auxin affects numerous processes in land plants. The central auxin signaling machinery, called the nuclear auxin pathway, is mediated by its pivotal receptor named TRANSPORT INHIBITOR RESPONSE 1/AUXIN SIGNALING F-BOX (TIR1/AFB). The nuclear auxin pathway is widely conserved in land plants, but auxin also accumulates in various algae. Although auxin affects the growth of several algae, the components that mediate auxin signaling have not been identified. We previously reported that exogenous auxin suppresses cell proliferation in the Klebsormidium nitens that is a member of streptophyte algae, a paraphyletic group sharing the common ancestor with land plants. Although K. nitens lacks TIR1/AFB, auxin affects the expression of numerous genes. Thus, elucidation of the mechanism of auxin-inducible gene expression in K. nitens would provide important insights into the evolution of auxin signaling. Here, we show that some motifs are enriched in the promoter sequences of auxin-inducible genes in K. nitens. We also found that the transcription factor KnRAV activates several auxin-inducible genes and directly binds the promoter of KnLBD1, a representative auxin-inducible gene. We propose that KnRAV has the potential to regulate auxin-responsive gene expression in K. nitens.

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“…BRs play a key role in the balance of nutrient homeostasis and root growth as demonstrated by the exogenous application of BR biosynthesis inhibitors, which decreased P, K, Mg, Fe, and Mg concentrations [ 69 ]. The role of ABA–light interactions is evident in several physiological processes, such as seedling growth, shade avoidance, stem elongation, and leaf development [ 74 ]. ABA mediates light-regulated mineral uptake by modulating transporter proteins in root tissues.…”

Section: Light Signaling Network Of Nutrient Uptake and Utilizationmentioning

confidence: 99%

The Role of Blue and Red Light in the Orchestration of Secondary Metabolites, Nutrient Transport and Plant Quality

Trivellini

Toscano

Romano

et al. 2023

Plants

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Light is a fundamental environmental parameter for plant growth and development because it provides an energy source for carbon fixation during photosynthesis and regulates many other physiological processes through its signaling. In indoor horticultural cultivation systems, sole-source light-emitting diodes (LEDs) have shown great potential for optimizing growth and producing high-quality products. Light is also a regulator of flowering, acting on phytochromes and inducing or inhibiting photoperiodic plants. Plants respond to light quality through several light receptors that can absorb light at different wavelengths. This review summarizes recent progress in our understanding of the role of blue and red light in the modulation of important plant quality traits, nutrient absorption and assimilation, as well as secondary metabolites, and includes the dynamic signaling networks that are orchestrated by blue and red wavelengths with a focus on transcriptional and metabolic reprogramming, plant productivity, and the nutritional quality of products. Moreover, it highlights future lines of research that should increase our knowledge to develop tailored light recipes to shape the plant characteristics and the nutritional and nutraceutical value of horticultural products.

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Basic Protein Modules Combining Abscisic Acid and Light Signaling in Arabidopsis

Cited by 15 publications

References 94 publications

Suppression of the HOS1 Gene Affects the Level of ROS Depending on Light and Cold

Suppression of the HOS1 Gene Affects the Level of ROS Depending on Light and Cold

Cis-regulatory elements and transcription factors related to auxin signaling in the streptophyte algae Klebsormidium nitens

The Role of Blue and Red Light in the Orchestration of Secondary Metabolites, Nutrient Transport and Plant Quality

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