Assessment of sunburn damage in Chardonnay grapes in relation to leaf removal timing

Research output: Other contribution to conferencePoster

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Abstract

Sunburn damage commonly appears as browning of the berry surface when these are directly exposed to sunlight in combination with high temperatures and ultraviolet radiation. Factors such as variety, berry developmental stage, ambient temperature, water availability and viticultural practices (i.e. defoliation) modulate the intensity of symptoms. Leaf removal is a common practice in cool viticultural areas to reduce disease pressure. However, overexposure of bunches can lead to a higher degree of sunburn. Previous research indicates that if performed before véraison, defoliation leads
to an early accumulation of photoprotective compounds such as the
flavonoids and the carotenoids which would protect the berry from UV damage and reduce the intensity of sunburn but evidence is lacking. The aim of this study was to evaluate the effect of leaf removal timing on the incidence of sunburn as well as on the concentration of photoprotective compounds.
Original languageEnglish
Publication statusPublished - Jul 2019
Event17th Australian Wine Industry Technical Conference (AWITC 2019) - Adelaide Convention Centre, Adelaide, Australia
Duration: 21 Jul 201924 Jul 2019
https://awitc.com.au

Conference

Conference17th Australian Wine Industry Technical Conference (AWITC 2019)
CountryAustralia
CityAdelaide
Period21/07/1924/07/19
Internet address

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sunburn
grapes
small fruits
defoliation
leaves
angle of incidence
signs and symptoms (plants)
ultraviolet radiation
ambient temperature
solar radiation
carotenoids
developmental stages
temperature
water

Cite this

Gambetta, J., Romat, V., Holzapfel, B., & Schmidtke, L. (2019). Assessment of sunburn damage in Chardonnay grapes in relation to leaf removal timing. Poster session presented at 17th Australian Wine Industry Technical Conference (AWITC 2019), Adelaide, Australia.
Gambetta, Joanna ; Romat, Valentina ; Holzapfel, Bruno ; Schmidtke, Leigh. / Assessment of sunburn damage in Chardonnay grapes in relation to leaf removal timing. Poster session presented at 17th Australian Wine Industry Technical Conference (AWITC 2019), Adelaide, Australia.
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abstract = "Sunburn damage commonly appears as browning of the berry surface when these are directly exposed to sunlight in combination with high temperatures and ultraviolet radiation. Factors such as variety, berry developmental stage, ambient temperature, water availability and viticultural practices (i.e. defoliation) modulate the intensity of symptoms. Leaf removal is a common practice in cool viticultural areas to reduce disease pressure. However, overexposure of bunches can lead to a higher degree of sunburn. Previous research indicates that if performed before v{\'e}raison, defoliation leads to an early accumulation of photoprotective compounds such as theflavonoids and the carotenoids which would protect the berry from UV damage and reduce the intensity of sunburn but evidence is lacking. The aim of this study was to evaluate the effect of leaf removal timing on the incidence of sunburn as well as on the concentration of photoprotective compounds.",
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author = "Joanna Gambetta and Valentina Romat and Bruno Holzapfel and Leigh Schmidtke",
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Gambetta, J, Romat, V, Holzapfel, B & Schmidtke, L 2019, 'Assessment of sunburn damage in Chardonnay grapes in relation to leaf removal timing' 17th Australian Wine Industry Technical Conference (AWITC 2019), Adelaide, Australia, 21/07/19 - 24/07/19, .

Assessment of sunburn damage in Chardonnay grapes in relation to leaf removal timing. / Gambetta, Joanna; Romat, Valentina; Holzapfel, Bruno; Schmidtke, Leigh.

2019. Poster session presented at 17th Australian Wine Industry Technical Conference (AWITC 2019), Adelaide, Australia.

Research output: Other contribution to conferencePoster

TY - CONF

T1 - Assessment of sunburn damage in Chardonnay grapes in relation to leaf removal timing

AU - Gambetta, Joanna

AU - Romat, Valentina

AU - Holzapfel, Bruno

AU - Schmidtke, Leigh

PY - 2019/7

Y1 - 2019/7

N2 - Sunburn damage commonly appears as browning of the berry surface when these are directly exposed to sunlight in combination with high temperatures and ultraviolet radiation. Factors such as variety, berry developmental stage, ambient temperature, water availability and viticultural practices (i.e. defoliation) modulate the intensity of symptoms. Leaf removal is a common practice in cool viticultural areas to reduce disease pressure. However, overexposure of bunches can lead to a higher degree of sunburn. Previous research indicates that if performed before véraison, defoliation leads to an early accumulation of photoprotective compounds such as theflavonoids and the carotenoids which would protect the berry from UV damage and reduce the intensity of sunburn but evidence is lacking. The aim of this study was to evaluate the effect of leaf removal timing on the incidence of sunburn as well as on the concentration of photoprotective compounds.

AB - Sunburn damage commonly appears as browning of the berry surface when these are directly exposed to sunlight in combination with high temperatures and ultraviolet radiation. Factors such as variety, berry developmental stage, ambient temperature, water availability and viticultural practices (i.e. defoliation) modulate the intensity of symptoms. Leaf removal is a common practice in cool viticultural areas to reduce disease pressure. However, overexposure of bunches can lead to a higher degree of sunburn. Previous research indicates that if performed before véraison, defoliation leads to an early accumulation of photoprotective compounds such as theflavonoids and the carotenoids which would protect the berry from UV damage and reduce the intensity of sunburn but evidence is lacking. The aim of this study was to evaluate the effect of leaf removal timing on the incidence of sunburn as well as on the concentration of photoprotective compounds.

KW - sunburn

KW - leaf removal

KW - browning

M3 - Poster

ER -

Gambetta J, Romat V, Holzapfel B, Schmidtke L. Assessment of sunburn damage in Chardonnay grapes in relation to leaf removal timing. 2019. Poster session presented at 17th Australian Wine Industry Technical Conference (AWITC 2019), Adelaide, Australia.