Overexpression of Banana ATG8f Modulates Drought Stress Resistance in Arabidopsis

Li, Bing; Liu, Guoyin; Wang, Yuqi; Wei, Yunxie; Hong, Shi

doi:10.3390/biom9120814

“…MdATG3a, MdATG3b, MdATG7b, and MdATG18a of apple were shown to confer tolerance to nitrogen/carbon starvation, drought, salt, or osmotic stresses by ectopic-expressing in Arabidopsis and apple [18][19][20][21]. Li et al reported that a banana MaATG8f improved drought stress tolerance in transgenic Arabidopsis through modulating reactive oxygen species (ROS) metabolism, abscisic acid biosynthesis, and autophagy activity [22]. Chen et al overexpressed an ATG8 in Arabidopsis that increased autophagic activity and improved nitrogen remobilization efficiency [23].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Analysis of Autophagy-Related Genes in Sweet Orange (Citrus sinensis) Highlights Their Roles in Response to Abiotic Stresses

Fu

¹

,

Zhou

²

,

Xu

³

et al. 2020

IJMS

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Autophagy is a highly conserved intracellular degradation pathway that breaks down damaged macromolecules and/or organelles. It is involved in plant development and senescence, as well as in biotic and abiotic stresses. However, the autophagy process and related genes are largely unknown in citrus. In this study, we identified 35 autophagy-related genes (CsATGs—autophagy-related genes (ATGs) of Citrus sinensis, Cs) in a genome-wide manner from sweet orange (Citrus sinensis). Bioinformatic analysis showed that these CsATGs were highly similar to Arabidopsis ATGs in both sequence and phylogeny. All the CsATGs were randomly distributed on nine known (28 genes) and one unknown (7 genes) chromosomes. Ten CsATGs were predicted to be segmental duplications. Expression patterns suggested that most of the CsATG were significantly up- or down-regulated in response to drought; cold; heat; salt; mannitol; and excess manganese, copper, and cadmium stresses. In addition, two ATG18 members, CsATG18a and CsATG18b, were cloned from sweet orange and ectopically expressed in Arabidopsis. The CsATG18a and CsATG18b transgenic plants showed enhanced tolerance to osmotic stress, salt, as well as drought (CsATG18a) or cold (CsATG18b), compared to wild-type plants. These results highlight the essential roles of CsATG genes in abiotic stresses.

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“…However, some data suggest that elevated autophagy might induce ABA responses. For example, the overexpression of banana ATG8f modulated drought stress resistance in Arabidopsis [ 144 ], and the overexpression of NBR1 in Arabidopsis resulted in increased ABA signaling [ 145 ].…”

Section: Role Of Tor Kinase Autophagy and Intracellular Trafficking In The Control Of Aba Signalingmentioning

confidence: 99%

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

Sirko

¹

,

Wawrzyńska

²

,

Brzywczy

³

et al. 2021

IJMS

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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.

show abstract

“…However, some data suggest that elevated autophagy might induce ABA responses. For example, the overexpression of banana ATG8f modulated drought stress resistance in Arabidopsis [144], and overexpression of NBR1 in Arabidopsis resulted in increased ABA signaling [145].…”

Section: Role Of Tor Kinase Autophagy and Intracellular Trafficking In The Control Of Aba Signalingmentioning

confidence: 99%

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

Sirko¹,

Wawrzyńska²,

Brzywczy³

et al. 2021

Preprint

11

0

View full text Add to dashboard Cite

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.

show abstract

Overexpression of Banana ATG8f Modulates Drought Stress Resistance in Arabidopsis

Cited by 29 publications

References 77 publications

Comprehensive Analysis of Autophagy-Related Genes in Sweet Orange (Citrus sinensis) Highlights Their Roles in Response to Abiotic Stresses

Comprehensive Analysis of Autophagy-Related Genes in Sweet Orange (Citrus sinensis) Highlights Their Roles in Response to Abiotic Stresses

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

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

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