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Open AccessArticle

Genome-Wide HMG Family Investigation and Its Role in Glycoalkaloid Accumulation in Wild Tuber-Bearing Solanum commersonii

1
Department of Agricultural Sciences, University of Naples Federico II, Via Università 133, 80055 Portici, NA, Italy
2
National Research Council of Italy, Institute of Biosciences and Bioresources (CNR-IBBR), Via Università 133, 80055 Portici, NA, Italy
3
CREA Research Centre for Vegetable and Ornamental Crops, Via Cavalleggeri 25, 84098 Pontecagnano Faiano, SA, Italy
*
Author to whom correspondence should be addressed.
Life 2020, 10(4), 37; https://doi.org/10.3390/life10040037
Received: 6 March 2020 / Revised: 4 April 2020 / Accepted: 9 April 2020 / Published: 10 April 2020
(This article belongs to the Section Plant Science and Engineering)
Steroidal glycoalkaloids (SGAs) are a class of nitrogen-containing glycosides occurring in several plant families and biosynthesized through a specific pathway. HMG-CoA reductase is the first enzyme of this pathway, and its transcription can be regulated by biotic and abiotic stressors and even in a tissue-specific manner. This study aimed to characterize the HMG genes family in a tuber-bearing potato species, Solanum commersonii, using transcriptional and functional approaches. Our results provided evidence that four ScHMGs with different tissue-specificities represent the HMG gene family in S. commersonii and that they originated from ScHMG1 through segmental duplications. Phylogenetic analysis suggests that ScHMG1 is the direct ortholog of AtHMG1, which is associated with SGAs accumulation in plants. Its overexpression in S. commersonii revealed that this gene plays a key role in the accumulation of glycoalkaloids regulating the production of dehydrocommersonine. View Full-Text
Keywords: HMG1; wild potato; sterols; transgenic potato HMG1; wild potato; sterols; transgenic potato
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Villano, C.; D’Amelia, V.; Esposito, S.; Adelfi, M.G.; Contaldi, F.; Ferracane, R.; Vitaglione, P.; Aversano, R.; Carputo, D. Genome-Wide HMG Family Investigation and Its Role in Glycoalkaloid Accumulation in Wild Tuber-Bearing Solanum commersonii. Life 2020, 10, 37.

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