The effect of defoliation on the 3-isobutyl-2-methoxypyrazine biosynthesis in wine grapes

Yujuan Lei, Zhansheng Ma, Pengbao Shi, Yuxia Sun, Ping Wang and Xueqiang Guan
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Yujuan Lei: College of Food Science & Technology, Hebei Normal University of Science and Technology, Qinhuangdao, P.R. China
Zhansheng Ma: College of Food Science & Technology, Hebei Normal University of Science and Technology, Qinhuangdao, P.R. China
Pengbao Shi: College of Food Science & Technology, Hebei Normal University of Science and Technology, Qinhuangdao, P.R. China
Yuxia Sun: Shandong Academy of Grape/Winegrape and Wine Technological Innovation Center of Shandong Province, Jinan, P.R. China
Ping Wang: College of Food Engineering, Shihezi University, Shi Hezi, P.R. China
Xueqiang Guan: Shandong Academy of Grape/Winegrape and Wine Technological Innovation Center of Shandong Province, Jinan, P.R. China

Horticultural Science, 2022, vol. 49, issue 2, 117-120

Abstract: Field studies were conducted on Vitis vinifera cv. 'Cabernet Sauvignon' to evaluate the effects of the defoliation time (pre- and post-flowering and veraison) and severity on the 3-isobutyl-2-methoxypyrazine (IBMP) concentration and expression levels of the key related genes in grape berries. The IBMP concentration in the grapes decreased significantly at harvest after all the defoliation treatments. The earlier and heavier the defoliation treatment, the lower the IBMP concentration. The relative expression level of VvOMT3 in the berry skin was closely positively correlated with the IBMP accumulation in all the treatments. Early defoliation coupled with a 1-week delay in the harvest time may be an effective management strategy to control the IBMP concentration in grapes.

Keywords: defoliation; 'Cabernet Sauvignon'; 3-Isobutyl-2-methoxypyrazine; biosynthesis (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlhor:v:49:y:2022:i:2:id:70-2020-hortsci

DOI: 10.17221/70/2020-HORTSCI

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