Abstract
Cruciferous sprout is a new form of vegetable product rich in bioactive compounds, especially glucosinolates. Previous studies have focused on increasing the accumulation of glucosinolates in cruciferous sprouts by applying different chemical regulators, with a particular focus on their contribution to nutritional quality and health benefits. Nevertheless, the effects of melatonin and UV-B irradiation on glucosinolate biosynthesis remain unclear. In this study, it was found that changes in melatonin concentrations significantly affected the contents of individual as well as total aliphatic and indolic glucosinolates. The 5 μmol·L-1 melatonin was decided as the optimum concentration that could increase the content of beneficial glucosinolates including glucoraphanin and 4-methoxy glucobrassicin in Chinese kale sprouts. Notably, the enhancement of glucosinolate accumulation by melatonin treatment could be further amplified by UV-B irradiation. Furthermore, our results showed that R2R3-MYB transcription factor BoaMYB28 and BoaMYB51, which are central regulators of aliphatic and indolic glucosinolate biosynthesis respectively, were both involved in the regulation of glucosinolate biosynthesis by melatonin and UV-B irradiation. Additionally, the expression of glucosinolate biosynthetic genes, including BoaCYP79F1, BoaCYP83A1, BoaSUR1, BoaUGT74B1, BoaCYP79B2, BoaCYP79B3, and BoaCYP83B1 participated in the formation of core structures and BoaFMOGS-OX5, BoaAOP2, BoaCYP81F2, and BoaIGMT1 involved in the side-chain modification of aliphatic and indolic glucosinolate, was regulated by melatonin or UV-B irradiation. Taken together, these findings provide a potential strategy for improving the nutritional quality and resistance of Chinese kale sprouts.
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Claims 6
Claim · model-written summary
The 5 μmol·L-1 melatonin concentration increased the content of beneficial glucosinolates, including glucoraphanin and 4-methoxy glucobrassicin, in Chinese kale sprouts.
- Taxon
- Chinese kale sprouts
Brassica oleracea var. alboglabrae2 - Treatment
- 5 μmol·L-1 melatonine2
- Compound
- glucoraphanine2
- Outcome
- content of beneficial glucosinolates including glucoraphanin and 4-methoxy glucobrassicine2
- Direction
- increasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The 5 μmol·L-1 melatonin was decided as the optimum concentration that could increase the content of beneficial glucosinolates including glucoraphanin and 4-methoxy glucobrassicin in Chinese kale sprouts”
Claim · model-written summary
Changes in melatonin concentrations significantly affected the contents of individual and total aliphatic and indolic glucosinolates in Chinese kale sprout.
- Taxon
- Chinese kale sproutBrassica oleracea var. alboglabrat0
- Treatment
- changes in melatonin concentrationse1
- Outcome
- contents of individual as well as total aliphatic and indolic glucosinolatese1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“changes in melatonin concentrations significantly affected the contents of individual as well as total aliphatic and indolic glucosinolates”
t0“UV-B irradiation enhances the accumulation of beneficial glucosinolates induced by melatonin in Chinese kale sprout”
Claim · model-written summary
UV-B irradiation further amplified the enhancement of glucosinolate accumulation by melatonin treatment in Chinese kale sprout.
- Taxon
- Chinese kale sproutBrassica oleracea var. alboglabrat0
- Treatment
- UV-B irradiatione3
- Outcome
- enhancement of glucosinolate accumulatione3
- Direction
- amplifiede3
- Comparator
- melatonin treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the enhancement of glucosinolate accumulation by melatonin treatment could be further amplified by UV-B irradiation”
t0“UV-B irradiation enhances the accumulation of beneficial glucosinolates induced by melatonin in Chinese kale sprout”
Claim · model-written summary
The R2R3-MYB transcription factors BoaMYB28 and BoaMYB51 were involved in regulating glucosinolate biosynthesis under melatonin and UV-B irradiation in Chinese kale sprout.
- Taxon
- Chinese kale sproutBrassica oleracea var. alboglabrat0
- Treatment
- melatonin and UV-B irradiatione4
- Gene
- BoaMYB28 and BoaMYB51e4
- Outcome
- regulation of glucosinolate biosynthesise4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“R2R3-MYB transcription factor BoaMYB28 and BoaMYB51, which are central regulators of aliphatic and indolic glucosinolate biosynthesis respectively, were both involved in the regulation of glucosinolate biosynthesis by melatonin and UV-B irradiation”
t0“UV-B irradiation enhances the accumulation of beneficial glucosinolates induced by melatonin in Chinese kale sprout”
Claim · model-written summary
Glucosinolate biosynthetic genes BoaCYP79F1, BoaCYP83A1, BoaSUR1, BoaUGT74B1, BoaCYP79B2, BoaCYP79B3 and BoaCYP83B1 participated in forming the core structures of glucosinolates in Chinese kale sprout.
- Taxon
- Chinese kale sproutBrassica oleracea var. alboglabrat0
- Gene
- BoaCYP79F1, BoaCYP83A1, BoaSUR1, BoaUGT74B1, BoaCYP79B2, BoaCYP79B3, and BoaCYP83B1e5
- Outcome
- formation of core structurese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the expression of glucosinolate biosynthetic genes, including BoaCYP79F1, BoaCYP83A1, BoaSUR1, BoaUGT74B1, BoaCYP79B2, BoaCYP79B3, and BoaCYP83B1 participated in the formation of core structures”
t0“UV-B irradiation enhances the accumulation of beneficial glucosinolates induced by melatonin in Chinese kale sprout”
Claim · model-written summary
Expression of BoaFMOGS-OX5, BoaAOP2, BoaCYP81F2 and BoaIGMT1, which are involved in side-chain modification of glucosinolates, was regulated by melatonin or UV-B irradiation in Chinese kale sprout.
- Taxon
- Chinese kale sproutBrassica oleracea var. alboglabrat0
- Treatment
- melatonin or UV-B irradiatione6
- Gene
- BoaFMOGS-OX5, BoaAOP2, BoaCYP81F2, and BoaIGMT1e6
- Outcome
- side-chain modification of aliphatic and indolic glucosinolatee6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“BoaFMOGS-OX5, BoaAOP2, BoaCYP81F2, and BoaIGMT1 involved in the side-chain modification of aliphatic and indolic glucosinolate, was regulated by melatonin or UV-B irradiation”
t0“UV-B irradiation enhances the accumulation of beneficial glucosinolates induced by melatonin in Chinese kale sprout”
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