VitiSynth Full Entry

Reference: Does water stress exacerbate the impacts of heat stress on berry development of Vitis vinifera cv. Semillon vines grown in controlled environment conditions?
Key Statements


Anecdotal evidence suggested heat stress in grapevines can be reduced if vines are fully irrigated during a heat stress but only a few cultivars have been evaluated. Accordingly, Vitis vinifera L. cv. Semillon vines were grown in controlled environments and treated to a four-day 40°C heat event with and without water stress. Berry size, sugar content, gas exchange and water potentials were measured. Results indicated water stress was relatively mild, but berry growth was reversed when exposed to the heat event and water stress added to this effect whereas control berries continued growing. Similar results occurred with the sugar accumulation process, except sugar immediately stopped accumulating but heat plus water stress reduced the amount of berry sugar further. The stress treatments also impaired photosynthesis and more so when combined with water stress. While reductions in photosynthesis were mostly a result of stomatal closure, but perhaps also non-stomatal limitations, the reduced photoassimilates, especially of the heat plus water stressed vines, contributed to the lowered sugar amounts in the berries. These data strongly supported the conclusion that water stress exacerbated the effects of heat stress. The corollary is heat stress effects on vines will be ameliorated if no water stress is present.

(highlighting by VitiSynth)

Link to paper-

Partially indexed reference.

View Interactions

VitiSynth Review
Go Back


Publication Details

Published: 2021
Publication: New Zealand Journal of Crop and Horticultural Science
Issue: 2021 Online September 2021
Author: Greer D H 2021


Related Video

None for this Entry

Related Audio

None for this Entry

Discuss this Entry

No related discussions available.

Join Discussion

Latest Discussions
Special Report

Date: 19th April 2020
Vine Synth:Growth stage:VS 4 Flowering:VS 4c Bud development:VS 4c.2 Differentiation of main axis of anlage into inflorescence rachis primordium or tendril primordium

The development of inflorescence primordia (IP) is clearly described i...Read more

Date: 16th February 2020
Admin Synth:Guides:Data standards:Colour codes

I think it would be very useful if we have standard colour codes for e...Read more

Date: 29th October 2015
Reference:Journal:Weed Technology:2015:Online October 2015:Devkota P 2015:Influence of Spray Solution Temperature and Holding Duration on Weed Control with Premixed Glyphosate and Dicamba Formulation

Pesticides in general are chemical products, therefore the quality of ...Read more

List of sponsors.. Read more