AtCRY2 Negatively Regulates the Functions of AtANN2 and AtANN3 in Drought Tolerance by Affecting Their Subcellular Localization and Transmembrane Ca2+ Flow

Liu, Ting; Du, Leyan; Li, Qiushi; Kang, Jingda; Guo, Qi; Wang, Shilin

doi:10.3389/fpls.2021.754567

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…Importantly, AtANN1 which acts as a ROS-stimulated Ca 2+ channel was shown to play a major role in the eATP-induced increase in [Ca 2+ ] cyt in Arabidopsis roots [ 51 , 54 , 55 , 56 ]. AtAnn2/AtANN3-mediated Ca 2+ signaling is involved in photoperiod regulated drought stress responses [ 57 ]. Certain annexin members with peroxidase activity are shown to be involved in cellular redox reactions, e.g., when plants are exposed to stresses, annexins may suppress ROS accumulation, reduce lipid peroxidation, and regulate activities of the cell [ 58 , 59 ].…”

Section: Introductionmentioning

confidence: 99%

ATANN3 Is Involved in Extracellular ATP-Regulated Auxin Distribution in Arabidopsis thaliana Seedlings

Han

Xia

et al. 2023

Plants

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Extracellular ATP (eATP) plays multiple roles in plant growth and development, and stress responses. It has been revealed that eATP suppresses growth and alters the growth orientation of the root and hypocotyl of Arabidopsis thaliana by affecting auxin transport and localization in these organs. However, the mechanism of the eATP-stimulated auxin distribution remains elusive. Annexins are involved in multiple aspects of plant cellular metabolism, while their role in response to apoplastic signals remains unclear. Here, by using the loss-of-function mutations, we investigated the role of AtANN3 in the eATP-regulated root and hypocotyl growth. Firstly, the inhibitory effects of eATP on root and hypocotyl elongation were weakened or impaired in the AtANN3 null mutants (atann3–1 and atann3–2). Meanwhile, the distribution of DR5-GUS and DR5-GFP indicated that the eATP-induced asymmetric distribution of auxin in the root tips or hypocotyl cells occurred in wild-type control plants, while in atann3–1 mutant seedlings, it was not observed. Further, the eATP-induced asymmetric distribution of PIN2-GFP in root-tip cells or that of PIN3-GFP in hypocotyl cells was reduced in atann3–1 seedlings. Finally, the eATP-induced asymmetric distribution of cytoplasmic vesicles in root-tip cells was impaired in atann3–1 seedlings. Based on these results, we suggest that AtANN3 may be involved in eATP-regulated seedling growth by regulating the distribution of auxin and auxin transporters in vegetative organs.

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Section: Introductionmentioning

confidence: 99%

ATANN3 Is Involved in Extracellular ATP-Regulated Auxin Distribution in Arabidopsis thaliana Seedlings

Han

Xia

et al. 2023

Plants

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“…In A . thaliana , cryptochrome 2 represses the functions of AtAnn2 and AtAnn3 by affecting their subcellular localization and transmembrane Ca 2+ flow in drought stress [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

“…Also, cold-activated OST1/SnRK2.6 phosphorylates AtAnn1 and enhances its Ca 2+ transport activity which generates a Ca 2+ signal that mediates freezing tolerance [22]. In A. thaliana, cryptochrome 2 represses the functions of AtAnn2 and AtAnn3 by affecting their subcellular localization and transmembrane Ca 2+ flow in drought stress [23].…”

Section: Introductionmentioning

confidence: 99%

Genome-wide analysis of annexin gene family in Schrenkiella parvula and Eutrema salsugineum suggests their roles in salt stress response

et al. 2023

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Annexins (Anns) play an important role in plant development, growth and responses to various stresses. Although Ann genes have been characterized in some plants, their role in adaptation mechanisms and tolerance to environmental stresses have not been studied in extremophile plants. In this study, Ann genes in Schrenkiella parvula and Eutrema salsugineum were identified using a genome-wide method and phylogenetic relationships, subcellular distribution, gene structures, conserved residues and motifs and also promoter prediction have been studied through bioinformatics analysis. We identified ten and eight encoding putative Ann genes in S. parvula and E. salsugineum genome respectively, which were divided into six subfamilies according to phylogenetic relationships. By observing conservation in gene structures and protein motifs we found that the majority of Ann members in two extremophile plants are similar. Furthermore, promoter analysis revealed a greater number of GATA, Dof, bHLH and NAC transcription factor binding sites, as well as ABRE, ABRE3a, ABRE4, MYB and Myc cis-acting elements in compare to Arabidopsis thaliana. To gain additional insight into the putative roles of candidate Ann genes, the expression of SpAnn1, SpAnn2 and SpAnn6 in S. parvula was studied in response to salt stress, which indicated that their expression level in shoot increased. Similarly, salt stress induced expression of EsAnn1, 5 and 7, in roots and EsAnn1, 2 and 5 in leaves of E. salsugineum. Our comparative analysis implies that both halophytes have different regulatory mechanisms compared to A. thaliana and suggest SpAnn2 gene play important roles in mediating salt stress.

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The dual‐action mechanism of Arabidopsis cryptochromes

Qu,

Jiang,

Lin

2024

JIPB

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Photoreceptor cryptochromes (CRYs) mediate blue‐light regulation of plant growth and development. It has been reported that Arabidopsis CRY1 and CRY2 function by physically interacting with at least 84 proteins, including transcription factors or co‐factors, chromatin regulators, splicing factors, mRNA methyltransferases, DNA repair proteins, E3 ubiquitin ligases, protein kinases and so on. Of these 84 proteins, 47 have been reported to exhibit altered binding affinity to CRYs in response to blue light, and 41 have been shown to exhibit condensation to CRY photobodies. The blue light‐regulated composition or condensation of CRY complexes results in changes of gene expression and developmental programs. In this mini‐review, we analyzed recent studies of the photo‐regulatory mechanisms of Arabidopsis CRY complexes and proposed the dual mechanisms of action, including the “Lock‐and‐Key” and the “Liquid‐Liquid Phase Separation (LLPS)” mechanisms. The dual CRY action mechanisms explain, at least partially, the structural diversity of CRY‐interacting proteins and the functional diversity of the CRY photoreceptors.This article is protected by copyright. All rights reserved.

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AtCRY2 Negatively Regulates the Functions of AtANN2 and AtANN3 in Drought Tolerance by Affecting Their Subcellular Localization and Transmembrane Ca2+ Flow

Cited by 8 publications

References 44 publications

ATANN3 Is Involved in Extracellular ATP-Regulated Auxin Distribution in Arabidopsis thaliana Seedlings

ATANN3 Is Involved in Extracellular ATP-Regulated Auxin Distribution in Arabidopsis thaliana Seedlings

Genome-wide analysis of annexin gene family in Schrenkiella parvula and Eutrema salsugineum suggests their roles in salt stress response

The dual‐action mechanism of Arabidopsis cryptochromes

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