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Effects of gibberellin and cytokinin on phenolic and volatile composition of Sangiovese grapes
Year:
2022
Source of publication :
Scientia Horticulturae
Authors :
Kochanek, Bettina
;
.
Lichter, Amnon
;
.
Maoz, Itay
;
.
Volume :
295
Co-Authors:

Kamal Tyagi
Itay Maoz
Or Lapidot
Bettina Kochanek
Yael Butnaro
Meir Shlise
Larry Lerno
Susan E. Ebeler
Amnon Lichter

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Total pages:
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Abstract:

Cytokinin and gibberellin are plant growth regulators (PGRs) used to increase berry size in seedless table grapes but their effects on wine grape phenolics and volatiles was not studied. In the current study, gibberellic acid (GA3) and synthetic cytokinin forchlorfenuron (CPPU) and their combination were applied to fruitlets of Sangiovese and berries were sampled 79 days following application. All the treatment significantly increase berry diameter and berry weight and CPPU containing treatment increased skin thickness. All treatments reduced sugar accumulation and color development but did not have an effect on acid levels. HPLC analysis showed that total flavan-3-ols level was increased by CPPU, GA containing treatments reduced the levels of flavonols and anthocyanins were significantly reduced in all the treatment (≈50%). Phloroglucinol analysis showed that proanthocyanidins level were significantly increased whereas the mean degree of polymerization was reduced from 40 to ≈21 by all the treatments. GC–MS analysis of berries showed a decrease in fatty acid derived volatile compounds by all treatments with potential impact on flavor. Analysis of wine phenolics in subsequent harvest was in general agreement with the previous results. In summary, this study provides new information on how PGRs can change berry composition and subsequently wine attributes.

Note:
Related Files :
Condensed tannins
GA
proanthocyanidin' CPPU
Tannins
Vitis vinifera
Wine
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More details
DOI :
10.1016/j.scienta.2021.110860
Article number:
110860
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
57885
Last updated date:
02/03/2022 17:27
Creation date:
13/02/2022 15:51
Scientific Publication
Effects of gibberellin and cytokinin on phenolic and volatile composition of Sangiovese grapes
295

Kamal Tyagi
Itay Maoz
Or Lapidot
Bettina Kochanek
Yael Butnaro
Meir Shlise
Larry Lerno
Susan E. Ebeler
Amnon Lichter

Effects of gibberellin and cytokinin on phenolic and volatile composition of Sangiovese grapes

Cytokinin and gibberellin are plant growth regulators (PGRs) used to increase berry size in seedless table grapes but their effects on wine grape phenolics and volatiles was not studied. In the current study, gibberellic acid (GA3) and synthetic cytokinin forchlorfenuron (CPPU) and their combination were applied to fruitlets of Sangiovese and berries were sampled 79 days following application. All the treatment significantly increase berry diameter and berry weight and CPPU containing treatment increased skin thickness. All treatments reduced sugar accumulation and color development but did not have an effect on acid levels. HPLC analysis showed that total flavan-3-ols level was increased by CPPU, GA containing treatments reduced the levels of flavonols and anthocyanins were significantly reduced in all the treatment (≈50%). Phloroglucinol analysis showed that proanthocyanidins level were significantly increased whereas the mean degree of polymerization was reduced from 40 to ≈21 by all the treatments. GC–MS analysis of berries showed a decrease in fatty acid derived volatile compounds by all treatments with potential impact on flavor. Analysis of wine phenolics in subsequent harvest was in general agreement with the previous results. In summary, this study provides new information on how PGRs can change berry composition and subsequently wine attributes.

Scientific Publication
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