Stimulation of Various Phenolics in Plants Under Ambient UV‐B Radiation
Само за регистроване кориснике
2017
Аутори
Vidović, MarijaMorina, Filis
Veljović Jovanović, Sonja
Остала ауторства
Pratap Singh, VijaySingh, Samiksha
Mohan Prasad, Sheo
Parihar, Parul
Поглавље у монографији (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Under natural conditions, plants are constantly exposed to dynamic changes of solar
radiation, which mainly consists of infrared (IR, >700 nm), photosynthetically active
radiation (PAR, 400–700 nm) and minor portion of ultraviolet (UV) radiation (UV-B,
290–315 nm and UV-A, 315–400 nm). Besides being the primary source of energy
in photosynthesis, sunlight is an important signal which regulates plant growth and
development. In addition to light quantity, plants are able to monitor the quality,
periodicity and direction of light (reviewed in Caldwell et al., 2007; Jiao et al., 2007).
Plants perceive light signals through several protein photoreceptors: five phy-
tochromes (PHY A‐E), which are sensitive to red and far red light (600–750 nm), and
two cryptochromes (CRY1 and CRY2), two phototropins (PHOT1 and PHOT2) and
zeitlupe proteins (ZTLs) for blue and UV‐A radiation (315–500 nm), while UV‐B
radiation is sensed by UV Resistant Locus 8 (UVR8) (reviewed in Jiao et al., 200...7;
Heijde and Ulm, 2012).
During the period from the 1970s to 1990s, investigations on UV‐B effects on organ-
isms were in the centre of attention, due to alarming depletion of stratospheric ozone
layer and increased UV‐B radiation reaching the Earth’s surface. However, the results
of numerous studies that explored the impact of high UV‐B radiation on plants were
often contradictory. In following years, this was explained by different unrealistic
UV‐B : UV‐A : PAR ratios, high UV‐B doses applied, different spectral distribution in
the UV‐B region, as well as simultaneous effects of other environmental stressors
(drought, high temperature, nutrient deprivation), and previous plant exposure to
UV‐B radiation (plant history). Inconsistent reports on UV‐B effects on photosynthe-
sis and stomata conductance were a result of different UV‐B doses applied, species‐
specific, and even genotype‐specific responses, but also plant history and overall plant
metabolism. In the light of these findings, during the last decade, research on UV‐B radiation
effects on biological systems has advanced towards more controlled conditions aiming
to imitate ambient solar radiation. Using sun simulators with realistic balance of UV-B,
UV-A and PAR, is a very good solution to achieve realistic and reproducible experi-
mental conditions (Döhring et al., 1996; Aphalo et al., 2012). Contrary to previous
widely accepted beliefs, in the last several years it has been demonstrated that UV‐B
radiation, at low and ecologically relevant doses, presents an important regulator of
plant growth and development (Jenkins, 2009; Hideg et al., 2013). Plants grown in the
open field, exposed to natural UV‐B doses, have higher nutritional and pharmacologi-
cal value than plants grown in polytunnels and glasshouses, which are non‐transpar-
ent to UV radiation (Jansen et al., 2008; Behn et al., 2010). Moreover, it has been shown
that UV‐B radiation improves plant adaptive capacity to drought, high temperatures,
pathogen and insect attack, and nutrient deficiency conditions (Schmidt et al., 2000;
Caputo et al., 2006). These findings have a strong impact on the agricultural, pharma-
ceutical and food industries.
A hallmark of UV‐B response in plants is accumulation of secondary metabolites, such as
phenolic compounds (particularly flavonoids and phenylpropanoids), alkaloids and terpe-
noids. Phenolics are the most abundant secondary metabolites in plants, and 20% of carbon
fixed in photosynthesis is directed to their biosynthesis (Hernández and Van Breusegem,
2010). Phenolic compounds in plants are involved in many processes, from growth and
development, to flowering, reproduction and seed dispersion, defence against pathogens,
plant–insect interactions and protection against numerous abiotic stresses (Gould and
Lister, 2005; Sedlarević et al., 2016). The most well‐studied mechanism of UV‐B induction
of phenolic metabolism is certainly the UVR8 pathway, which will be discussed in detail in
this chapter. However, regarding UV‐B and sunlight exposure in general, antioxidative vs.
UV‐B‐absorbing (screening) functions of phenolics remain debatable (Agati et al., 2013).
Genes encoding UVR8‐like proteins are highly conserved, and have been identified in a
large number of plants, algae and mosses, suggesting the importance of this pathway for the
adaptation of autotrophic organisms to sunlight (Tilbrook et al., 2013).
In this chapter, we have provided overview of publications reporting phenolics
induction by supplementary UV‐B radiation in the last decade. Plant response depends
on UV‐B fluence rate and spectrum. Therefore, it is important to standardize UV‐B
exposure experimental designs to adequately compare the responses of phenolic
metabolism obtained in different studies. In order to interpret morphological and
physiological changes in plants, phenolics function and distribution on the cellular,
tissue and plant level should be understood. Moreover, recent findings on relationship
between photosynthesis and storage molecules, such as starch, and stimulated flavo-
noid biosynthesis under UV‐B radiation are considered.
Кључне речи:
Plectranthus coleoides / Ramonda serbica / Ramonda serbica / Plant phenolic compounds / UVR8 receptor / UV‐B‐induced photomorphological responsesИзвор:
UV-B Radiation: From Environmental Stressor to Regulator of Plant Growth, 2017Издавач:
- Wiley
URI
https://www.wiley.com/en-us/UV+B+Radiation:+From+Environmental+Stressor+to+Regulator+of+Plant+Growth-p-9781119143604https://imagine.imgge.bg.ac.rs/handle/123456789/1849
Институција/група
Institut za molekularnu genetiku i genetičko inženjerstvoTY - CHAP AU - Vidović, Marija AU - Morina, Filis AU - Veljović Jovanović, Sonja PY - 2017 UR - https://www.wiley.com/en-us/UV+B+Radiation:+From+Environmental+Stressor+to+Regulator+of+Plant+Growth-p-9781119143604 UR - https://imagine.imgge.bg.ac.rs/handle/123456789/1849 AB - Under natural conditions, plants are constantly exposed to dynamic changes of solar radiation, which mainly consists of infrared (IR, >700 nm), photosynthetically active radiation (PAR, 400–700 nm) and minor portion of ultraviolet (UV) radiation (UV-B, 290–315 nm and UV-A, 315–400 nm). Besides being the primary source of energy in photosynthesis, sunlight is an important signal which regulates plant growth and development. In addition to light quantity, plants are able to monitor the quality, periodicity and direction of light (reviewed in Caldwell et al., 2007; Jiao et al., 2007). Plants perceive light signals through several protein photoreceptors: five phy- tochromes (PHY A‐E), which are sensitive to red and far red light (600–750 nm), and two cryptochromes (CRY1 and CRY2), two phototropins (PHOT1 and PHOT2) and zeitlupe proteins (ZTLs) for blue and UV‐A radiation (315–500 nm), while UV‐B radiation is sensed by UV Resistant Locus 8 (UVR8) (reviewed in Jiao et al., 2007; Heijde and Ulm, 2012). During the period from the 1970s to 1990s, investigations on UV‐B effects on organ- isms were in the centre of attention, due to alarming depletion of stratospheric ozone layer and increased UV‐B radiation reaching the Earth’s surface. However, the results of numerous studies that explored the impact of high UV‐B radiation on plants were often contradictory. In following years, this was explained by different unrealistic UV‐B : UV‐A : PAR ratios, high UV‐B doses applied, different spectral distribution in the UV‐B region, as well as simultaneous effects of other environmental stressors (drought, high temperature, nutrient deprivation), and previous plant exposure to UV‐B radiation (plant history). Inconsistent reports on UV‐B effects on photosynthe- sis and stomata conductance were a result of different UV‐B doses applied, species‐ specific, and even genotype‐specific responses, but also plant history and overall plant metabolism. In the light of these findings, during the last decade, research on UV‐B radiation effects on biological systems has advanced towards more controlled conditions aiming to imitate ambient solar radiation. Using sun simulators with realistic balance of UV-B, UV-A and PAR, is a very good solution to achieve realistic and reproducible experi- mental conditions (Döhring et al., 1996; Aphalo et al., 2012). Contrary to previous widely accepted beliefs, in the last several years it has been demonstrated that UV‐B radiation, at low and ecologically relevant doses, presents an important regulator of plant growth and development (Jenkins, 2009; Hideg et al., 2013). Plants grown in the open field, exposed to natural UV‐B doses, have higher nutritional and pharmacologi- cal value than plants grown in polytunnels and glasshouses, which are non‐transpar- ent to UV radiation (Jansen et al., 2008; Behn et al., 2010). Moreover, it has been shown that UV‐B radiation improves plant adaptive capacity to drought, high temperatures, pathogen and insect attack, and nutrient deficiency conditions (Schmidt et al., 2000; Caputo et al., 2006). These findings have a strong impact on the agricultural, pharma- ceutical and food industries. A hallmark of UV‐B response in plants is accumulation of secondary metabolites, such as phenolic compounds (particularly flavonoids and phenylpropanoids), alkaloids and terpe- noids. Phenolics are the most abundant secondary metabolites in plants, and 20% of carbon fixed in photosynthesis is directed to their biosynthesis (Hernández and Van Breusegem, 2010). Phenolic compounds in plants are involved in many processes, from growth and development, to flowering, reproduction and seed dispersion, defence against pathogens, plant–insect interactions and protection against numerous abiotic stresses (Gould and Lister, 2005; Sedlarević et al., 2016). The most well‐studied mechanism of UV‐B induction of phenolic metabolism is certainly the UVR8 pathway, which will be discussed in detail in this chapter. However, regarding UV‐B and sunlight exposure in general, antioxidative vs. UV‐B‐absorbing (screening) functions of phenolics remain debatable (Agati et al., 2013). Genes encoding UVR8‐like proteins are highly conserved, and have been identified in a large number of plants, algae and mosses, suggesting the importance of this pathway for the adaptation of autotrophic organisms to sunlight (Tilbrook et al., 2013). In this chapter, we have provided overview of publications reporting phenolics induction by supplementary UV‐B radiation in the last decade. Plant response depends on UV‐B fluence rate and spectrum. Therefore, it is important to standardize UV‐B exposure experimental designs to adequately compare the responses of phenolic metabolism obtained in different studies. In order to interpret morphological and physiological changes in plants, phenolics function and distribution on the cellular, tissue and plant level should be understood. Moreover, recent findings on relationship between photosynthesis and storage molecules, such as starch, and stimulated flavo- noid biosynthesis under UV‐B radiation are considered. PB - Wiley T2 - UV-B Radiation: From Environmental Stressor to Regulator of Plant Growth T1 - Stimulation of Various Phenolics in Plants Under Ambient UV‐B Radiation UR - https://hdl.handle.net/21.15107/rcub_imagine_1849 ER -
@inbook{ author = "Vidović, Marija and Morina, Filis and Veljović Jovanović, Sonja", year = "2017", abstract = "Under natural conditions, plants are constantly exposed to dynamic changes of solar radiation, which mainly consists of infrared (IR, >700 nm), photosynthetically active radiation (PAR, 400–700 nm) and minor portion of ultraviolet (UV) radiation (UV-B, 290–315 nm and UV-A, 315–400 nm). Besides being the primary source of energy in photosynthesis, sunlight is an important signal which regulates plant growth and development. In addition to light quantity, plants are able to monitor the quality, periodicity and direction of light (reviewed in Caldwell et al., 2007; Jiao et al., 2007). Plants perceive light signals through several protein photoreceptors: five phy- tochromes (PHY A‐E), which are sensitive to red and far red light (600–750 nm), and two cryptochromes (CRY1 and CRY2), two phototropins (PHOT1 and PHOT2) and zeitlupe proteins (ZTLs) for blue and UV‐A radiation (315–500 nm), while UV‐B radiation is sensed by UV Resistant Locus 8 (UVR8) (reviewed in Jiao et al., 2007; Heijde and Ulm, 2012). During the period from the 1970s to 1990s, investigations on UV‐B effects on organ- isms were in the centre of attention, due to alarming depletion of stratospheric ozone layer and increased UV‐B radiation reaching the Earth’s surface. However, the results of numerous studies that explored the impact of high UV‐B radiation on plants were often contradictory. In following years, this was explained by different unrealistic UV‐B : UV‐A : PAR ratios, high UV‐B doses applied, different spectral distribution in the UV‐B region, as well as simultaneous effects of other environmental stressors (drought, high temperature, nutrient deprivation), and previous plant exposure to UV‐B radiation (plant history). Inconsistent reports on UV‐B effects on photosynthe- sis and stomata conductance were a result of different UV‐B doses applied, species‐ specific, and even genotype‐specific responses, but also plant history and overall plant metabolism. In the light of these findings, during the last decade, research on UV‐B radiation effects on biological systems has advanced towards more controlled conditions aiming to imitate ambient solar radiation. Using sun simulators with realistic balance of UV-B, UV-A and PAR, is a very good solution to achieve realistic and reproducible experi- mental conditions (Döhring et al., 1996; Aphalo et al., 2012). Contrary to previous widely accepted beliefs, in the last several years it has been demonstrated that UV‐B radiation, at low and ecologically relevant doses, presents an important regulator of plant growth and development (Jenkins, 2009; Hideg et al., 2013). Plants grown in the open field, exposed to natural UV‐B doses, have higher nutritional and pharmacologi- cal value than plants grown in polytunnels and glasshouses, which are non‐transpar- ent to UV radiation (Jansen et al., 2008; Behn et al., 2010). Moreover, it has been shown that UV‐B radiation improves plant adaptive capacity to drought, high temperatures, pathogen and insect attack, and nutrient deficiency conditions (Schmidt et al., 2000; Caputo et al., 2006). These findings have a strong impact on the agricultural, pharma- ceutical and food industries. A hallmark of UV‐B response in plants is accumulation of secondary metabolites, such as phenolic compounds (particularly flavonoids and phenylpropanoids), alkaloids and terpe- noids. Phenolics are the most abundant secondary metabolites in plants, and 20% of carbon fixed in photosynthesis is directed to their biosynthesis (Hernández and Van Breusegem, 2010). Phenolic compounds in plants are involved in many processes, from growth and development, to flowering, reproduction and seed dispersion, defence against pathogens, plant–insect interactions and protection against numerous abiotic stresses (Gould and Lister, 2005; Sedlarević et al., 2016). The most well‐studied mechanism of UV‐B induction of phenolic metabolism is certainly the UVR8 pathway, which will be discussed in detail in this chapter. However, regarding UV‐B and sunlight exposure in general, antioxidative vs. UV‐B‐absorbing (screening) functions of phenolics remain debatable (Agati et al., 2013). Genes encoding UVR8‐like proteins are highly conserved, and have been identified in a large number of plants, algae and mosses, suggesting the importance of this pathway for the adaptation of autotrophic organisms to sunlight (Tilbrook et al., 2013). In this chapter, we have provided overview of publications reporting phenolics induction by supplementary UV‐B radiation in the last decade. Plant response depends on UV‐B fluence rate and spectrum. Therefore, it is important to standardize UV‐B exposure experimental designs to adequately compare the responses of phenolic metabolism obtained in different studies. In order to interpret morphological and physiological changes in plants, phenolics function and distribution on the cellular, tissue and plant level should be understood. Moreover, recent findings on relationship between photosynthesis and storage molecules, such as starch, and stimulated flavo- noid biosynthesis under UV‐B radiation are considered.", publisher = "Wiley", journal = "UV-B Radiation: From Environmental Stressor to Regulator of Plant Growth", booktitle = "Stimulation of Various Phenolics in Plants Under Ambient UV‐B Radiation", url = "https://hdl.handle.net/21.15107/rcub_imagine_1849" }
Vidović, M., Morina, F.,& Veljović Jovanović, S.. (2017). Stimulation of Various Phenolics in Plants Under Ambient UV‐B Radiation. in UV-B Radiation: From Environmental Stressor to Regulator of Plant Growth Wiley.. https://hdl.handle.net/21.15107/rcub_imagine_1849
Vidović M, Morina F, Veljović Jovanović S. Stimulation of Various Phenolics in Plants Under Ambient UV‐B Radiation. in UV-B Radiation: From Environmental Stressor to Regulator of Plant Growth. 2017;. https://hdl.handle.net/21.15107/rcub_imagine_1849 .
Vidović, Marija, Morina, Filis, Veljović Jovanović, Sonja, "Stimulation of Various Phenolics in Plants Under Ambient UV‐B Radiation" in UV-B Radiation: From Environmental Stressor to Regulator of Plant Growth (2017), https://hdl.handle.net/21.15107/rcub_imagine_1849 .