Morphological, physiological, and secondary metabolic responses of Taraxacum officinale to salt stress

Zhu, Yu; Gu, Wei; Tian, Rong; Li, Chao; Ji, Yuanyuan; Li, Tao; Wei, Chenbin; Chen, Ziyun

doi:10.1016/j.plaphy.2022.08.002

Cited by 18 publications

(9 citation statements)

References 66 publications

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“…In this study, we found that NaCl at a concentration of 50 mM increased the contents of both phenolic acids and total flavonoids ( Figure 2 c,d). Similarly, Zhu et al [ 70 ] found that in Taraxacum officinale , the contents of chlorogenic and isochlorogenic acids were higher under salt stress conditions (≤1 g kg −1 ) compared to those in the control, with the opposite effect observed at higher concentrations of NaCl. An interesting solution limiting the negative impact of NaCl is the use of MEL.…”

Section: Resultsmentioning

confidence: 87%

The Content of Phenolic Compounds in Stevia rebaudiana (Bertoni) Plants Derived from Melatonin and NaCl Treated Seeds

Simlat

Ptak

Wójtowicz

et al. 2023

Plants

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Stevia is a plant with many beneficial properties. It contains not only steviol glycosides, which are used as non-caloric natural sweeteners, but also a number of metabolites with antioxidant properties. This study examined the content of both phenolic acids and flavonoids in stevia leaves as an effect of treating seeds with melatonin and conducting germination in NaCl conditions. The results of our research indicated higher amounts of phenolic acids compared to flavonoids in stevia leaves. Among these acids, isochlorogenic, rosmarinic, and chlorogenic acids were accumulated in the largest amounts, regardless of the germination conditions. For 5 and 100 µM of melatonin treatments, the content of both phenolic acids and flavonoids increased. However, in salinity conditions (50 mM NaCl), 500 µM of melatonin had the most favorable effect on the synthesis of phenolic acids. The phenolic acids in that case reached a level three-times higher than that in the samples with the same melatonin concentration but without NaCl. We also found that the content of phenolic compounds varied depending on the age of the leaves. To the best of our knowledge, this is the first study to describe the effect of melatonin and NaCl on the synthesis on phenolic acids and flavonoids in stevia.

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Section: Resultsmentioning

confidence: 87%

The Content of Phenolic Compounds in Stevia rebaudiana (Bertoni) Plants Derived from Melatonin and NaCl Treated Seeds

Simlat

Ptak

Wójtowicz

et al. 2023

Plants

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“…Water potential is a numerical value of the potential energy of water with respect to the content of the solute. The lower value of the water potential indicates a higher concentration of the solute compared with the solvent ( Zhu et al., 2022 ). The amount of solutes accumulated in the leaves of L. tetragonum increased in the NaCl treatment in comparison with the 0-mM NaCl.…”

Section: Resultsmentioning

confidence: 99%

“…Abnormal weather conditions, water scarcity, and reduced available land area due to salinity accumulation negatively impact the production of staple crops such as wheat ( Deng et al., 2016 ). In saline soil, the concentration of ions such as Na + and Cl − , which interfere with water absorption of the roots, is high and, thus, has adverse effects on plants such as damage to the chloroplast structure and reduction in plant yield ( Soni et al., 2021 ; Zhu et al., 2022 ). Halophytes can complete their life cycle at NaCl concentrations above 200 mM ( Flowers and Colmer, 2008 ).…”

Section: Introductionmentioning

confidence: 99%

Physiological and biochemical responses of Limonium tetragonum to NaCl concentrations in hydroponic solution

et al. 2023

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IntroductionLimonium (L.) tetragonum (Thunb.) A. A. Bullock, a halophyte that grows all over the southwest coast of Korea, is a medicinal plant with various pharmacological effects. The salt defense mechanism stimulates the biosynthesis of various secondary metabolites and improves functional substances. In this study, we investigated the optimal NaCl concentration for the growth and enhancement of secondary metabolites in hydroponically grown L. tetragonum.MethodsThe seedlings grown for 3 weeks in a hydroponic cultivation system were treated with 0-, 25-, 50-, 75-, and 100-mM NaCl in Hoagland’s nutrient solution for 8 weeks. No significant effect on the growth and chlorophyll fluorescence was observed for the NaCl concentrations below 100-mM.Results and discussionsThe increase in the NaCl concentration resulted in the decrease in the water potential of the L. tetragonum leaves. The Na+ content accumulated in the aerial part increased rapidly and the content of K+, which acts as an antagonist, decreased with the increase in NaCl concentrations in hydroponics. The total amino acid content of L. tetragonum decreased compared to the 0-mM NaCl, and most of the amino acid content decreased as the NaCl concentration increased. In contrast, the content of urea, proline (Pro), β-alanine, ornithine, and arginine was increased with an increase in NaCl concentration. The Pro content at 100-mM NaCl accounted for 60% of the total amino acids and was found to be a major osmoregulator as an important component of the salt defense mechanisms. The top five compounds identified in the L. tetragonum were classified as flavonoids while the flavanone compound was detected only in the NaCl treatments. A total of four myricetin glycosides were increased in comparison to the 0-mM NaCl. Among the differentially expressed genes, a significantly large change in Gene ontology was seen in the circadian rhythm. NaCl treatment enhanced the flavonoid-based substances of L. tetragonum. The optimum NaCl concentration for the enhancement of secondary metabolites of the L. tetragonum in the vertical farm-hydroponic cultivation system was 75-mM NaCl.

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“…Dandelion belongs to the Asteraceae family. It is rich in phenolic acids; has antibacterial, anti-inflammatory, and tumor-inhibiting effects; and is usually used in medicine and health care in China [1,6,7]. Dandelion can tolerate strong salt stress and is easily found in salinealkali land [1].…”

Section: Introductionmentioning

confidence: 99%

“…However, their biosynthetic pathways in different plants or when under abiotic stress are different, mainly including two pathways: one is the synthesis of rosmarinic acid and salicylic acid using 4-coumaric acid and 4-hydroxyphenyllactic acid as precursors, which mainly exist in plants of the family Labiatae, represented by Salvia divinorum; and the other is the synthesis of chlorogenic acid compounds using quinic acid, caffeic acid, and ferulic acid as precursors, which are mainly found in the family Lonicera, represented by Lonicera japonica Thunb. During the biosynthetic pathway, enzymes such as phenylalanine ammonia lyase (PAL), quinate O-hydroxycinnamoyl transferase (HQT), caffeic acid O-methyltransferase (COMT), etc., regulate the synthesis of phenolic acids [6,9,10]. Meanwhile, researching the function of these enzyme-related genes has also become a focus.…”

Section: Introductionmentioning

confidence: 99%

Study of Dandelion (Taraxacum mongolicum Hand.-Mazz.) Salt Response and Caffeic Acid Metabolism under Saline Stress by Transcriptome Analysis

Wu,

Meng,

Feng

et al. 2024

Genes

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Utilizing salt-tolerant plants is a cost-effective strategy for agricultural production on salinized land. However, little is known about the mechanism of dandelion (Taraxacum mongolicum Hand.-Mazz.) in response to saline stress and caffeic acid biosynthesis. We investigated the morphological and physiological variations of two dandelions, namely, “BINPU2” (dandelion A) and “TANGHAI” (dandelion B) under gradient NaCl concentrations (0, 0.3%, 0.5%, 0.7%, and 0.9%), and analyzed potential mechanisms through a comparison analysis of transcriptomes in the two dandelions. Dandelion A had a high leaf weight; high ρ-coumaric acid, caffeic acid, ferulic acid, and caffeoyl shikimic acid contents; and high activities of POD and Pro. The maximum content of four kinds of phenolic acids mostly occurred in the 0.7% NaCl treatment. In this saline treatment, 2468 and 3238 differentially expressed genes (DEGs) in dandelion A and B were found, of which 1456 and 1369 DEGs in the two dandelions, respectively, showed up-regulation, indicating that more up-regulated DEGs in dandelion A may cause its high salt tolerance. Further, Gene Ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that dandelion salt response and caffeic acid metabolism were mainly enriched in the phenylpropanoid biosynthesis pathway (ko00940) and response to ethylene (GO: 0009723). The caffeic acid biosynthesis pathway was reconstructed based on DEGs which were annotated to PAL, C4H, 4CL, HCT, C3′H, and CSE. Most of these genes showed a down-regulated mode, except for parts of DEGs of 4CL (TbA05G077650 and TbA07G073600), HCT (TbA03G009110, TbA03G009080, and novel.16880), and COMT (novel.13839). In addition, more up-regulated transcription factors (TFs) of ethylene TFs in dandelion A were found, but the TFs of ERF104, CEJ1, and ERF3 in the two dandelions under saline stress showed an opposite expression pattern. These up-regulated genes could enhance dandelion salt tolerance, and down-regulated DEGs in the caffeic acid biosynthesis pathway, especially CSE (TbA08G014310) and COMT (TbA04G07330), could be important candidate genes in the synthesis of caffeic acid under saline stress. The above findings revealed the potential mechanisms of salt response and caffeic acid metabolism in dandelion under saline stress, and provide references for salt-tolerant plant breeding and cultivation on saline–alkali land in the future.

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Morphological, physiological, and secondary metabolic responses of Taraxacum officinale to salt stress

Cited by 18 publications

References 66 publications

The Content of Phenolic Compounds in Stevia rebaudiana (Bertoni) Plants Derived from Melatonin and NaCl Treated Seeds

The Content of Phenolic Compounds in Stevia rebaudiana (Bertoni) Plants Derived from Melatonin and NaCl Treated Seeds

Physiological and biochemical responses of Limonium tetragonum to NaCl concentrations in hydroponic solution

Study of Dandelion (Taraxacum mongolicum Hand.-Mazz.) Salt Response and Caffeic Acid Metabolism under Saline Stress by Transcriptome Analysis

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