Different responses to UV-B enhanced solar radiation in radish and carrot

Nithia, S.M. Janetta; Shanthi, N.; Kulandaivelu, G.

doi:10.1007/s11099-005-0051-9

Cited by 16 publications

(8 citation statements)

References 34 publications

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“…In addition to shoots, faba bean roots also responded to moderate UV-B by increasing flavonoid concentrations (Figures 1Á4), which is consistent with the phenomenon observed in A. thaliana (Tong et al 2008) and radish (Raphanus sativus) roots (Nithia et al 2005). Moderate UV-B application distinctly enriched the total flavonoid levels, as well as the levels of kaempferol, luteolin, and quercetin in both the shoots and roots of sole and in mixed cropped faba bean.…”

Section: Resultssupporting

confidence: 85%

Mixed cropping with maize combined with moderate UV-B radiations lead to enhanced flavonoid production and root growth in faba bean

Krumbein

Neugart

et al. 2012

Journal of Plant Interactions

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Flavonoids have recently been proposed to function as developmental regulators and/or signaling molecules under biotic or abiotic stress. The aim of this study was to determine the composition and concentration of fiavonoid aglycones (kaempferol, luteolin, and quercetin) in faba bean shoots and roots, as affected by interspecific root interactions with maize and moderate UV-B radiation. Independent of the UV-B treatment, interspecific root interactions with maize enhanced the concentration of both quercetin and luteolin in the faba bean shoots and roots by 50 and 97.8%, respectively, and improved the root length by 14.6%. In addition, moderate UV-B radiation facilitated a systematic increase of both aglycones in both shoots and roots without affecting plant growth. To our knowledge, this report is the first work documenting the response of faba bean flavonoids to interspecific root interactions with maize and moderate UV-B radiation, and it provides a new perspective for understanding interspecific interactions.

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Section: Resultssupporting

confidence: 85%

Mixed cropping with maize combined with moderate UV-B radiations lead to enhanced flavonoid production and root growth in faba bean

Krumbein

Neugart

et al. 2012

Journal of Plant Interactions

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“…Such an effect relies on the biosynthesis costs of flavonoids and related phenolic compounds, which are generally higher than those of biomass [36]. Conversely, several authors have reported an increased plant biomass in response to moderate UV-B doses in faba bean [33], radish [37], and Arabidopsis [38]. A similar response was found in our work, where both top and root weights increased upon treatment (Figure 1).…”

Section: Discussionsupporting

confidence: 88%

UV-B Exposure of Black Carrot (Daucus carota ssp. sativus var. atrorubens) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic Compounds

et al. 2019

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Black carrot (Daucus carota L. ssp. sativus var. atroburens) 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−2 day−1) 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 cis-zeatin (cZ) and trans-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.

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“…The analyses of environment effects on the overall accumulation level of secondary metabolites per sub-family (chlorogenic acids, flavones, mono- and sesquiterpenes) revealed statistical differences between the three environments studied (Angers tunnel, Blagon field and Ychoux field; Table 1 ). This has already been described in a very high number of papers where biotic or abiotic environmental factors are cited as responsible for fluctuations in the accumulation of plant secondary metabolites, even for the carrot species 33 , 36 – 39 . In the present study, the overall accumulation level of secondary metabolites could also be explained by a combination of different biotic and abiotic factors, however we were not able to distinguish one from the other, and the main focus of the present paper is genetics.…”

Section: Discussionmentioning

confidence: 80%

Link between carrot leaf secondary metabolites and resistance to Alternaria dauci

Koutouan

Clerc

Baltenweck

et al. 2018

Sci Rep

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Alternaria Leaf Blight (ALB), caused by the fungus Alternaria dauci, is the most damaging foliar disease affecting carrots (Daucus carota). In order to identify compounds potentially linked to the resistance to A. dauci, we have used a combination of targeted and non-targeted metabolomics to compare the leaf metabolome of four carrot genotypes with different resistance levels. Targeted analyses were focused on terpene volatiles, while total leaf methanolic extracts were subjected to non-targeted analyses using liquid chromatography couple to high-resolution mass spectrometry. Differences in the accumulation of major metabolites were highlighted among genotypes and some of these metabolites were identified as potentially involved in resistance or susceptibility. A bulk segregant analysis on F3 progenies obtained from a cross between one of the resistant genotypes and a susceptible one, confirmed or refuted the hypothesis that the metabolites differentially accumulated by these two parents could be linked to resistance.

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Different responses to UV-B enhanced solar radiation in radish and carrot

Cited by 16 publications

References 34 publications

Mixed cropping with maize combined with moderate UV-B radiations lead to enhanced flavonoid production and root growth in faba bean

Mixed cropping with maize combined with moderate UV-B radiations lead to enhanced flavonoid production and root growth in faba bean

UV-B Exposure of Black Carrot (Daucus carota ssp. sativus var. atrorubens) Plants Promotes Growth, Accumulation of Anthocyanin, and Phenolic Compounds

Link between carrot leaf secondary metabolites and resistance to Alternaria dauci

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