Developmental changes in the carotenoids and volatile compounds of Pinot noir grape berries were investigated in this study from pea size to harvest during 2012. HPLC analysis showed continued decrease of lutein, β-carotene, neochrome a and neoxanthin continued to decrease during berry development, with rapid decrease of lutein and (9’z)-neoxanthin occurred two weeks before véraison. Neochrome b and violaxanthin accumulated at early development and started to decrease two weeks before véraison.  Volatile analysis demonstrated that total β-damascenone, TDN and vitispirane all increased dramatically, especially at later stage of ripening, whereas the changes for α-ionone and β-ionone were not obvious. The correlation between carotenoids and C13-norisoprenoids in the grape berries was compound-dependent, suggesting dependency on enzyme activity and specificity. The effect of  viticultural practices on C13-norisprenoids in grapes and wines will also be discussed.<br/>

Development of carotenoids and C<sub>13</sub>-norisoprenoids  in Vitis vinifera L. Cv. Pinot noir grapes

254th National Meeting (2017)

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Development of carotenoids and C13-norisoprenoids in Vitis vinifera L. Cv. Pinot noir grapes

Development of carotenoids and C₁₃-norisoprenoids in Vitis vinifera L. Cv. Pinot noir grapes