Comparison of transcriptional expression patterns of carotenoid metabolism in 'Cabernet Sauvignon' grapes from two regions with distinct climate.
The downstream flux of carotenoid metabolism in grape berries includes the biosynthesis of norisoprenoids, a group of important aroma compounds, and the production of ABA, a well-known plant hormone. This study focused on the transcriptional profiling comparison of genes participating in the biosynthesis of carotenoids, norisoprenoids, and ABA in Vitis vinifera 'Cabernet Sauvignon' grapes at pea size, veraison, and ripening stages. The grapes were obtained from Changli (CL, eastern China) and Gaotai (GT, western China) regions and analyzed using RNA-sequencing technology. The transcripts required for the carotenoid biosynthesis pathway showed a coordinated expression pattern, mainly expressing at green stage for CL and at veraison for GT, respectively. However, the carotenoid content evolution was not coincident with the timing and pattern of related gene expressions, since more carotenoids were accumulated at veraison in CL relative to two weeks before veraison in GT. Interestingly, norisoprenoid content was higher in GT than in CL, particularly at veraison and ripening, while the key gene encoding carotenoid cleavage dioxygenases, VvCCD1, showed an inverse relationship within the two regions. Higher flux was expected through the carotenoid pathway into ABA production in GT, based on the higher expression level of 9-cis-epoxycarotenoid dioxygenase and drought growing conditions. Most components involved in ABA and ethylene signaling showed distinct expression profiles in the two regions. These results revealed that downstream flux of carotenoid metabolism in grape berries showed regional differences. This study lays a foundation for future research to explore the molecular basis of climatic influences on carotenoid, norisoprenoid, and ABA biosynthesis.
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Viticulture and Enology, Ministry of Agriculture, Beijing 100083, China.
Wei-Kai
WK
Chen
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Viticulture and Enology, Ministry of Agriculture, Beijing 100083, China.
Ke-Ji
KJ
Yu
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
Bin
B
Liu
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Viticulture and Enology, Ministry of Agriculture, Beijing 100083, China.
Yi-Bin
YB
Lan
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
Run-Ze
RZ
Sun
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
Qiang
Q
Li
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Viticulture and Enology, Ministry of Agriculture, Beijing 100083, China.
Fei
F
He
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Viticulture and Enology, Ministry of Agriculture, Beijing 100083, China.
Qiu-Hong
QH
Pan
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Viticulture and Enology, Ministry of Agriculture, Beijing 100083, China.
Chang-Qing
CQ
Duan
Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Viticulture and Enology, Ministry of Agriculture, Beijing 100083, China. Electronic address: jun_wang@cau.edu.cn.
Jun
J
Wang
D000040:Abscisic Acid / Q000378:metabolism; D002338:Carotenoids / Q000378:metabolism*; D049308:Dioxygenases / Q000378:metabolism; D018506:Gene Expression Regulation, Plant / Q000235:genetics / Q000502:physiology; D010940:Plant Proteins / Q000378:metabolism; D027843:Vitis / Q000235:genetics / Q000378:metabolism*
D010940:Plant Proteins; D002338:Carotenoids; D000040:Abscisic Acid; D049308:Dioxygenases; C109043:9-cis-epoxy-carotenoid dioxygenase
Cabernet Sauvignon; Carotenoids; Climatic conditions; Norisoprenoids; RNA-Seq