Halotropism: Phytohormonal Aspects and Potential Applications

Szepesi, Ágnes

doi:10.3389/fpls.2020.571025

Cited by 13 publications

(9 citation statements)

References 116 publications

(148 reference statements)

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“…Crosstalk interaction with other phytohormones, as well as signaling network are very complex. On the other hand, CKs and auxins can have antagonistic effect at low to medium concentration, and only at higher concentration they have adjunctive effect [ 24 , 50 ]. With respect to gibberellins, little effect has in this halophyte, so the effect of each treatment may be genotype-dependent [ 48 ].…”

Section: Discussionmentioning

confidence: 99%

“…They also are related to abiotic stress tolerance, and regulate the root: shoot ratio, control stomatal resistance, regulate antioxidant enzymes, delay leaf senescence and act as signal molecules [ 21 ]. Auxins regulate cell elongation, vascular tissue development and apical dominance [ 24 ]. Cytokinins control cell division, chloroplast biogenesis, leaf senescence, shoot differentiation, anthocyanin production and photomorphogenic development [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Plant Growth Regulators Application Enhance Tolerance to Salinity and Benefit the Halophyte Plantago coronopus in Saline Agriculture

Bueno

Cordovilla

2021

Plants

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Climate change, soil salinisation and desertification, intensive agriculture and the poor quality of irrigation water all create serious problems for the agriculture that supplies the world with food. Halophyte cultivation could constitute an alternative to glycophytic cultures and help resolve these issues. Plantago coronopus can be used in biosaline agriculture as it tolerates salt concentrations of 100 mM NaCl. To increase the salt tolerance of this plant, plant growth regulators such as polyamine spermidine, salicylic acid, gibberellins, cytokinins, and auxins were added in a hydroponic culture before the irrigation of NaCl (200 mM). In 45-day-old plants, dry weight, water content, osmolyte (sorbitol), antioxidants (phenols, flavonoids), polyamines (putrescine, spermidine, spermine (free, bound, and conjugated forms)) and ethylene were determined. In non-saline conditions, all plant regulators improved growth while in plants treated with salt, spermidine application was the most effective in improving growth, osmolyte accumulation (43%) and an increase of antioxidants (24%) in P. coronopus. The pretreatments that increase the sorbitol content, endogenous amines (bound spermine fraction), phenols and flavonoids may be the most effective in protecting to P. coronopus against stress and, therefore, could contribute to improving the tolerance to salinity and increase nutritional quality of P. coronopus.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plant Growth Regulators Application Enhance Tolerance to Salinity and Benefit the Halophyte Plantago coronopus in Saline Agriculture

Bueno

Cordovilla

2021

Plants

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“…A Genome-Wide Association Study (GWAS) into natural variation of halotropism within Arabidopsis identified AtDOB1 and AtCHX13 as additional players in the response ( Deolu-Ajayi et al, 2019 ). Both genes are upregulated under salt stress, and both appear to be involved in Na + /K + homeostasis, suggesting that internal ion homeostasis is likely a key factor underlying the halotropism response ( Galvan-Ampudia et al, 2013 ; Pierik and Testerink, 2014 ; Szepesi, 2020 ). Interestingly, several salt-tolerant, halophyte species such as Brassica indica and Limonium bicolor , show positive halotropism in heterogenous mild saline soils ( Shelef et al, 2010 ; Leng et al, 2019 ).…”

Section: Tropisms and Root Branchingmentioning

confidence: 99%

Root plasticity under abiotic stress

et al. 2021

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Abiotic stresses increasingly threaten existing ecological and agricultural systems across the globe. Plant roots perceive these stresses in the soil and adapt their architecture accordingly. This review provides insights into recent discoveries showing the importance of root system architecture and plasticity for the survival and development of plants under heat, cold, drought, salt, and flooding stress. In addition, we review the molecular regulation and hormonal pathways involved in controlling root system architecture plasticity, main root growth, branching and lateral root growth, root hair development and formation of adventitious roots. Several stresses affect root anatomy by causing aerenchyma formation, lignin and suberin deposition, and Casparian strip modulation. Roots can also actively grow towards favourable soil conditions and avoid environments detrimental to their development. Recent advances in understanding the cellular mechanisms behind these different root tropisms are discussed. Understanding root plasticity will be instrumental for the development of crops that are resilient in the face of abiotic stress.

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“…Halotropism is a newly discovered salt avoidance tropism, which allows plant to runaway from salinity by bending. Halotropism can assist plant to remodel root system architecture (RSA) to survive under salt condition (Szepesi, 2020).…”

Section: Lncrna2-fl As a Regulator Of Salt Tolerance In Fl478mentioning

confidence: 99%

Long non-coding RNAs as the regulatory hubs in rice response to salt stress

Mansuri

Azizi

Shobbar

2022

Preprint

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Background: Salinity seriously constrains growth and fertility of rice worldwide. Long non-coding RNAs (lncRNAs) play crucial roles in plant abiotic stress response. However, salt responsive lncRNAs are poorly understood in rice. Results: Herein, differentially expressed lncRNAs (DE-lncRNAs) were identified in FL478 (salt tolerant) compared to its susceptible parent (IR29) using RNA-seq. In FL478 and IR29, 8724 and 9235 transcripts with length of >200 bp were nominated as potential lncRNAs, respectively. Rigorous filtering left four (in FL478) and nine (in IR29) DE-lncRNAs with only 2 DE-lncRNAs in common. ATAC-seq data showed that the genomic regions of all four lncRNAs in FL478 and 6/9 in IR29 are significantly accessible for transcription. Weighted correlation network analysis (WGCNA) revealed that lncRNA.2-FL was highly correlated with 173 mRNAs as trans-targets and a gene encoding pentatricopeptide repeat (PPR) protein was predicted as cis-target of lncRNA.2-FL. In silico mutagenesis analysis proposed the same transcription factor binding sites (TFBSs) in vicinity of the trans- and cis-regulatory target genes of lncRNA.2-FL, which significantly affect their transcription start site (TSS). Conclusions: This study provides new insights into involvement of the DE-lncRNAs in rice response to salt stress. Among them, lncRNA.2-FL may play a significant regulatory role in the salt stress tolerance of FL478.

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Halotropism: Phytohormonal Aspects and Potential Applications

Cited by 13 publications

References 116 publications

Plant Growth Regulators Application Enhance Tolerance to Salinity and Benefit the Halophyte Plantago coronopus in Saline Agriculture

Plant Growth Regulators Application Enhance Tolerance to Salinity and Benefit the Halophyte Plantago coronopus in Saline Agriculture

Root plasticity under abiotic stress

Long non-coding RNAs as the regulatory hubs in rice response to salt stress

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