UV-B Exposure of Black Carrot (<i>Daucus carota</i> ssp. <i>sativus</i> var. <i>atrorubens</i>) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic Compounds
Black carrot (<i>Daucus carota</i> L. ssp. <i>sativus</i> var. <i>atroburens</i>) is a root vegetable with anthocyanins as major phenolic compounds. The accumulation of phenolic compounds is a common response to UV-B exposure, acting as protective compounds and as...
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| Format: | Article |
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MDPI AG
2019-06-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/9/6/323 |
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| author | Renate Müller José R. Acosta-Motos Dominik K. Großkinsky José A. Hernández Henrik Lütken Gregorio Barba-Espin |
| author_facet | Renate Müller José R. Acosta-Motos Dominik K. Großkinsky José A. Hernández Henrik Lütken Gregorio Barba-Espin |
| author_sort | Renate Müller |
| collection | DOAJ |
| description | Black carrot (<i>Daucus carota</i> L. ssp. <i>sativus</i> var. <i>atroburens</i>) is a root vegetable with anthocyanins as major phenolic compounds. The accumulation of phenolic compounds is a common response to UV-B exposure, acting as protective compounds and as antioxidants. In the present study, black carrot plants grown under a 12-h photoperiod were supplemented with UV-B radiation (21.6 kj m<sup>−2</sup> day<sup>−1</sup>) during the last two weeks of growth. Carrot taproots and tops were harvested separately, and the effect of the UV-B irradiance was evaluated in terms of size (biomass and length), total monomeric anthocyanin content (TMC), total phenolic content (TPC), and phytohormones levels. The results showed that UV-B irradiance promoted plant growth, as shown by the elevated root (30%) and top (24%) biomass, the increased TMC and TPC in the root (over 10%), and the increased TPC of the top (9%). A hormone analysis revealed that, in response to UV-B irradiance, the levels of abscisic acid (ABA), jasmonic acid (JA), and salicylic acid (SA) decreased in tops while the level of the cytokinins <i>cis</i>-zeatin (cZ) and <i>trans</i>-zeatinriboside (tZR) increased in roots, which correlated with an amplified growth and the accumulation of anthocyanins and phenolic compounds. Beyond the practical implications that this work may have, it contributes to the understanding of UV-B responses in black carrot. |
| first_indexed | 2024-12-17T04:51:58Z |
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| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-12-17T04:51:58Z |
| publishDate | 2019-06-01 |
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| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-68bd77842cdd461eb6ffa68c71ea8bb82022-12-21T22:02:52ZengMDPI AGAgronomy2073-43952019-06-019632310.3390/agronomy9060323agronomy9060323UV-B Exposure of Black Carrot (<i>Daucus carota</i> ssp. <i>sativus</i> var. <i>atrorubens</i>) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic CompoundsRenate Müller0José R. Acosta-Motos1Dominik K. Großkinsky2José A. Hernández3Henrik Lütken4Gregorio Barba-Espin5Section for Crop Sciences, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Hoejbakkegaard Alle, 9–13, 2630 Taastrup, DenmarkDepartment of Fruit Breeding, CEBAS-CSIC, Campus de Espinardo, 30100 Murcia, SpainSection for Transport Biology, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, DenmarkDepartment of Fruit Breeding, CEBAS-CSIC, Campus de Espinardo, 30100 Murcia, SpainSection for Crop Sciences, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Hoejbakkegaard Alle, 9–13, 2630 Taastrup, DenmarkSection for Crop Sciences, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Hoejbakkegaard Alle, 9–13, 2630 Taastrup, DenmarkBlack carrot (<i>Daucus carota</i> L. ssp. <i>sativus</i> var. <i>atroburens</i>) is a root vegetable with anthocyanins as major phenolic compounds. The accumulation of phenolic compounds is a common response to UV-B exposure, acting as protective compounds and as antioxidants. In the present study, black carrot plants grown under a 12-h photoperiod were supplemented with UV-B radiation (21.6 kj m<sup>−2</sup> day<sup>−1</sup>) during the last two weeks of growth. Carrot taproots and tops were harvested separately, and the effect of the UV-B irradiance was evaluated in terms of size (biomass and length), total monomeric anthocyanin content (TMC), total phenolic content (TPC), and phytohormones levels. The results showed that UV-B irradiance promoted plant growth, as shown by the elevated root (30%) and top (24%) biomass, the increased TMC and TPC in the root (over 10%), and the increased TPC of the top (9%). A hormone analysis revealed that, in response to UV-B irradiance, the levels of abscisic acid (ABA), jasmonic acid (JA), and salicylic acid (SA) decreased in tops while the level of the cytokinins <i>cis</i>-zeatin (cZ) and <i>trans</i>-zeatinriboside (tZR) increased in roots, which correlated with an amplified growth and the accumulation of anthocyanins and phenolic compounds. Beyond the practical implications that this work may have, it contributes to the understanding of UV-B responses in black carrot.https://www.mdpi.com/2073-4395/9/6/323anthocyaninsblack carrotphenolic compoundsphytohormonesUV-B irradiance |
| spellingShingle | Renate Müller José R. Acosta-Motos Dominik K. Großkinsky José A. Hernández Henrik Lütken Gregorio Barba-Espin UV-B Exposure of Black Carrot (<i>Daucus carota</i> ssp. <i>sativus</i> var. <i>atrorubens</i>) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic Compounds Agronomy anthocyanins black carrot phenolic compounds phytohormones UV-B irradiance |
| title | UV-B Exposure of Black Carrot (<i>Daucus carota</i> ssp. <i>sativus</i> var. <i>atrorubens</i>) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic Compounds |
| title_full | UV-B Exposure of Black Carrot (<i>Daucus carota</i> ssp. <i>sativus</i> var. <i>atrorubens</i>) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic Compounds |
| title_fullStr | UV-B Exposure of Black Carrot (<i>Daucus carota</i> ssp. <i>sativus</i> var. <i>atrorubens</i>) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic Compounds |
| title_full_unstemmed | UV-B Exposure of Black Carrot (<i>Daucus carota</i> ssp. <i>sativus</i> var. <i>atrorubens</i>) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic Compounds |
| title_short | UV-B Exposure of Black Carrot (<i>Daucus carota</i> ssp. <i>sativus</i> var. <i>atrorubens</i>) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic Compounds |
| title_sort | uv b exposure of black carrot i daucus carota i ssp i sativus i var i atrorubens i plants promotes growth accumulation of anthocyanin and phenolic compounds |
| topic | anthocyanins black carrot phenolic compounds phytohormones UV-B irradiance |
| url | https://www.mdpi.com/2073-4395/9/6/323 |
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