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Homolog of Pea SGR Controls Stay-Green in Faba Bean (Vicia faba L.)

文献类型: 外文期刊

作者: Chen, Jingbin 1 ; Zhou, Huimin 1 ; Yuan, Xingxing 1 ; He, Yaming 1 ; Yan, Qiang 1 ; Lin, Yun 1 ; Wu, Ranran 1 ; Liu, Jinyang 1 ; Xue, Chenchen 1 ; Chen, Xin 1 ;

作者机构: 1.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Peoples R China

2.Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing 210014, Peoples R China

3.Nanjing Agr Univ, Coll Life Sci, Nanjing 210095, Peoples R China

关键词: faba bean; stay-green; green cotyledon; SGR; chlorophyll degradation

期刊名称:GENES ( 影响因子:3.5; 五年影响因子:3.9 )

ISSN:

年卷期: 2023 年 14 卷 5 期

页码:

收录情况: SCI

摘要: Faba bean is an important legume crop consumed as a vegetable or snack food, and its green cotyledons could present an attractive color for consumers. A mutation in SGR causes stay-green in plants. In this study, vfsgr was identified from a green-cotyledon-mutant faba bean, SNB7, by homologous blast between the SGR of pea and the transcriptome of faba bean. Sequence analysis revealed that a SNP at position 513 of the CDS of VfSGR caused a pre-stop codon, resulting in a shorter protein in the green-cotyledon faba bean SNB7. A dCaps marker was developed according to the SNP that caused the pre-stop, and this marker was completely associated with the color of the cotyledon of faba bean. SNB7 stayed green during dark treatment, while the expression level of VfSGR increased during dark-induced senescence in the yellow-cotyledon faba bean HST. Transient expression of VfSGR in Nicotiana. benthamiana leaves resulted in chlorophyll degradation. These results indicate that vfsgr is the gene responsible for the stay-green of faba bean, and the dCaps marker developed in this study provides a molecular tool for the breeding of green-cotyledon faba beans.

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