The moss flavone synthase I positively regulates the tolerance of plants to drought stress and UV-B radiation

Wang, Huijuan; Liu, Shenghao; Wang, Tailin; Liu, Hongwei; Xu, Xiangdong; Chen, Kaoshan; Zhang, Pengying

doi:10.1016/j.plantsci.2020.110591

Cited by 43 publications

(32 citation statements)

References 42 publications

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“…In the Antarctic moss Pohlia nutans , which grows in a natural habitat exposed to high UV‐B irradiation, 13 different flavones were identified (Wang et al 2020). Arabidopsis transgenic plants overexpressing a moss FNS enzyme accumulated high flavone levels and showed high tolerance to UV‐B radiation (Wang et al 2020). A similar protective role played by apigenin against UV‐B radiation was recently reported in mulberry.…”

Section: Flavonoids As Protective Compounds Against Light Exposurementioning

confidence: 99%

Recent advances on the roles of flavonoids as plant protective molecules after UV and high light exposure

Ferreyra

Serra

Casati

2021

Physiologia Plantarum

135

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Flavonoids are plant specialized metabolites that consist of one oxygenated and two aromatic rings. Different flavonoids are grouped according to the oxidation degree of the carbon rings; they can later be modified by glycosylations, hydroxylations, acylations, methylations, or prenylations. These modifications generate a wide collection of different molecules which have various functions in plants. All flavonoids absorb in the UV wavelengths, they mostly accumulate in the epidermis of plant cells and their biosynthesis is generally activated after UV exposure. Therefore, they have been assumed to protect plants against exposure to radiation in this range. Some flavonoids also absorb in other wavelengths, for example anthocyanins, which absorb light in the visible part of the solar spectrum. Besides, some flavonoids show antioxidant properties, that is, they act as scavengers of reactive oxygen species that could be produced after high fluence UV exposure. However, to date most reports were based on in vitro studies, and there is very little in vivo evidence of how their roles are carried out. In this review we first summarize the biosynthetic pathway of flavonoids and their characteristics, and we describe recent advances on the investigation of the role of three of the most abundant flavonoids: flavonols, flavones, and anthocyanins, protecting plants against UV exposure and high light exposure. We also present examples of how using UV-B supplementation to increase flavonoid content, is possible to improve plant nutritional and pharmaceutical values.

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Section: Flavonoids As Protective Compounds Against Light Exposurementioning

confidence: 99%

Recent advances on the roles of flavonoids as plant protective molecules after UV and high light exposure

Ferreyra

Serra

Casati

2021

Physiologia Plantarum

135

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“…For instance, the flavonoid apigenin enhanced the tolerance of rice plants to salt stress by increasing chlorophyll content and total flavonoid levels while reducing the accumulation of Na + ions in the roots (Mekawy et al, 2018). The overexpression of PnFNSI in Arabidopsis thaliana promoted the transformation of naringenin into apigenin and alleviated the growth restriction caused by naringenin accumulation (Wang et al, 2020). The increase in the flavonols was sufficient to improve A. thaliana tolerance to UVB (Stracke et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

The pigeon pea CcCIPK14‐CcCBL1 pair positively modulates drought tolerance by enhancing flavonoid biosynthesis

et al. 2021

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SUMMARY Calcineurin B‐like (CBL)‐interacting protein kinases (CIPKs) play a central role in Ca2+ signalling and promote drought tolerance in plants. The CIPK gene family in pigeon pea (Cajanus cajan L.), a major food crop affected by drought, has not previously been characterised. Here, we identified 28 CIPK genes in the pigeon pea genome. Five CcCIPK genes were strongly upregulated in roots upon drought treatment and were selected for further characterisation. Overexpression of CcCIPK13 and CcCIPK14 increased survival rates by two‐ to three‐fold relative to controls after 14 days of drought. Furthermore, the three major flavonoids, genistin, genistein and apigenin, were significantly upregulated in the same transgenic plants. Using CcCIPK14 as bait, we performed a yeast two‐hybrid screen and identified six interactors, including CcCBL1. CcCIPK14 exhibited autophosphorylation and phosphorylation of CcCBL1 in vitro. CcCBL1‐overexpressed plants displayed higher survival rates upon drought stress as well as higher expression of flavonoid biosynthetic genes and flavonoid content. CcCIPK14‐overexpressed plants in which CcCBL1 transcript levels were reduced by RNA interference had lower survival rates, which indicated CcCBL1 in the same pathway as CcCIPK14. Together, our results demonstrate a role for the CcCIPK14‐CcCBL1 complex in drought stress tolerance through the regulation of flavonoid biosynthesis in pigeon pea.

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“…Interestingly, the phenolic compounds showing this consistent response of M. polymorpha to UV have always been flavones, specifically apigenin and luteolin derivatives [20][21][22][26][27][28] (this study). Other plants have also shown a similar response of flavones to UV radiation under diverse UV conditions, including tracheophytes [44][45][46][47] and mosses such as Bryum argenteum [48] and Pohlia nutans [49]. The contribution of flavones to UV tolerance is probably based on their double role as antioxidants and UV screens [31,50], as occurs with other flavonoids (such as flavonols) in other plants [51,52].…”

Section: Effects Of Uv Radiationmentioning

confidence: 93%

Developmental Stage Determines the Accumulation Pattern of UV-Absorbing Compounds in the Model Liverwort Marchantia polymorpha subsp. ruderalis under Controlled Conditions

Soriano

Del-Castillo-Alonso

Monforte

et al. 2021

Plants

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The liverwort Marchantia polymorpha subsp. ruderalis is an emerging model plant, and some data are available on its responses to ultraviolet (UV) radiation. However, it is unknown if the developmental stage of the thalli modulates the effects of UV radiation on the contents of potentially protecting phenolic compounds. To fill this gap, liverwort samples were exposed or non-exposed to UV radiation for 38 days under controlled conditions, using three developmental stages: gemmae (G), one-month thalli (T1), and two-month thalli (T2). Then, the bulk level of methanol-soluble UV-absorbing compounds and the contents of six flavones (apigenin and luteolin derivatives) were measured. The UV responsiveness decreased with thallus age: G and T1 plants were the most UV-responsive and showed a strong increase in all the variables, with G plants more responsive than T1 plants. In UV-exposed T2 plants, only apigenin derivatives increased and more modestly, probably due to a lower acclimation capacity. Nevertheless, the thalli became progressively tougher due to a decreasing water content, representing a possible structural protection against UV. In UV-exposed plants, the temporal patterns of the accumulation of phenolic compounds were compound-specific. Most compounds decreased with thallus age, but di-glucuronide derivatives showed a bell-shaped pattern, with T1 plants showing the highest contents. A Principal Components Analysis (PCA) ordination of the different samples summarized the results found. The patterns described above should be taken into account to select thalli of an adequate developmental stage for experiments investigating the induction of phenolic compounds by UV radiation.

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The moss flavone synthase I positively regulates the tolerance of plants to drought stress and UV-B radiation

Cited by 43 publications

References 42 publications

Recent advances on the roles of flavonoids as plant protective molecules after UV and high light exposure

Recent advances on the roles of flavonoids as plant protective molecules after UV and high light exposure

The pigeon pea CcCIPK14‐CcCBL1 pair positively modulates drought tolerance by enhancing flavonoid biosynthesis

Developmental Stage Determines the Accumulation Pattern of UV-Absorbing Compounds in the Model Liverwort Marchantia polymorpha subsp. ruderalis under Controlled Conditions

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