Inheritance of Bulb Color in the Onion

Clarke, Alfred E.; Jones, Howard A.; Little, Thomas M.

doi:10.1093/genetics/29.6.569

Cited by 72 publications

(10 citation statements)

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“…Perkin and Hummel (46) very early reported the presence of quercetin in the outer scales of yellow onion bulbs and an anthocyanin in red bulbs. Subsequently, the latter was shown to contain a glycoside of cyanidin and the former, glycosides of quercetin (13,47,65). Protocatechuic acid was shown to accompany pigment and to function as inhibitor for pathogenic fungi by Walker and Link (65) and others.…”

Section: Discussionmentioning

confidence: 98%

Food Discoloration, Reddening of White Onion Bulb Purees

Joslyn¹,

Peterson²

1958

J. Agric. Food Chem.

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Section: Discussionmentioning

confidence: 98%

Food Discoloration, Reddening of White Onion Bulb Purees

Joslyn¹,

Peterson²

1958

J. Agric. Food Chem.

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“…An additional partially dominant pigment inhibitor gene is known. In the heterozygous form it results in bulbs with pigmented tops (51,245). It is clear that these genes having to do with pigment synthesis are also concerned with the presence of catechol and protocatechuic acid.…”

Section: Disease Resistancementioning

confidence: 99%

Biochemical Genetics.

Beadle¹

1945

Chem. Rev.

233

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“…In addition, at least five major loci ( I , C , G , R , and L ) controlling bulb color in onion have been identified by inheritance research [ 27 – 30 ]. The I and C loci were found to determine the white bulb color [ 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

The bHLH transcription factor AcB2 regulates anthocyanin biosynthesis in onion (Allium cepa L.)

Cao

Jiao

et al. 2022

Horticulture Research

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Onion bulb color is a key breeding trait. The red bulb color is caused by the presence of anthocyanins, which are products of the flavonoid synthesis pathway. Research on flavonoid regulation in onion is lagging compared with that in other crops. AcB2 encodes a bHLH transcription factor, and its transcription is positively associated with anthocyanin accumulation and correlated with the expression of AcMYB1, which is an activator in the flavonoid biosynthetic pathway in onion. Phylogenetic analysis showed that AcB2 was grouped into the TRANSPARENT TESTA 8 (TT8) clade of the bHLH IIIf subgroup. The AcB2 protein contained an MYB-interacting region and physically interacted with AcMYB1 in yeast and tobacco leaves. AcMYB1 directly bound to the promoters of anthocyanidin synthase (AcANS) and flavonoid 3-hydroxylase 1 (AcF3H1) and activated their expression. The coexpression of AcB2 with AcMYB1 in Arabidopsis thaliana protoplasts dramatically increased the expression of AcANS and AcF3H1 compared with that under the expression of AcMYB1 alone. Transient co-overexpression of AcB2 with AcMYB1 induced anthocyanin accumulation in the epithelial cells of onion bulbs. Complementation of the Arabidopsis tt8-1 mutant with AcB2 restored pigmentation defects in tt8-1. In addition, AcB2 physically interacted with AtTT2 in yeast cells and tobacco leaves, indicating that the functions of AcB2 were similar to those of AtTT8. Together, these results demonstrated that AcB2 enhanced the function of AcMYB1 in upregulating anthocyanin biosynthesis in onion, which provided a theoretical basis for breeding onions with higher anthocyanin contents.

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Inheritance of Bulb Color in the Onion

Cited by 72 publications

References 0 publications

Food Discoloration, Reddening of White Onion Bulb Purees

Food Discoloration, Reddening of White Onion Bulb Purees

Biochemical Genetics.

The bHLH transcription factor AcB2 regulates anthocyanin biosynthesis in onion (Allium cepa L.)

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