climate, cop26, climate change
Amy Quinton Illustrations of the different types of grapevine trellis systems that were tested. A through C are vertical shoot position systems grown traditionally, and at 60 and 80 degrees. D is a high-quadrilateral trellis, E is a single high-wire trellis, and F is a Guyot-pruned vertical shoot position. Credit: UC Davis

Exposing wine grapes to sunlight was the key to making a good quality cabernet. But even the toughest grapes may not withstand the extreme heat that comes with climate change. Too much heat, like California has experienced with recent heat waves, can lead to jarringly jam-like wines that are high in alcohol and sugar and lacking in acidity.

Researchers at the University of California, Davis, have spent the last six years trying to find ways to solve this problem by examining different types of grapevine trellises and water amounts. A new study finds that switching away from one of the most common and widely used trellis systems could alleviate the effects of extreme temperatures on cabernet and other grapes. The study was published in the journal Frontiers in Plant Science.

Vertical shoot position, or VSP, trellises are traditionally used systems where vine shoots are trained to grow up in vertical, narrow rows with the fruit growing lower to the ground, allowing for greater exposure to sunlight. The study found these systems detrimental to grapes.

“We’re finding that there is no shortage of solar radiation in California. During these heat waves, these VSP trellises provide zero protection,” said lead author Kaan Kurtural, professor of viticulture and enology and an extension specialist at UC Davis. “Because the fruit is low to the ground, you also get heat reflecting back into the canopy and clusters.”

Kurtural said VSP trellises have a greater chance of yielding fewer grapes, with a higher likelihood of sunburnt berries and poor color.

Protecting wine grapes from heat

The study finds that single high-wire trellis systems instead allow the vine leaves to shade the grapes. These trellises, which are about 5 1/2 feet tall, also reduce direct solar radiation. The study finds the reduced sunlight did not affect the grapes’ color or quality.

“We ended up with almost twice the amount of anthocyanins in the berry skin due to lack of degradation from hot summer sun,” Kurtural said. Anthocyanins are chemicals in the plant that provide red grapes their color and protect against UV rays. “The effect is similar to a good shade cloth but more economical. The high-wire systems also make it easy to harvest grapes with machines, which can save on labor costs.”

The study, which examined six different types of trellis systems and three different watering amounts also found the VSP trellises required the most water.

“We found that with the single high-wire trellis systems, growers get a more marketable yield for the amount of water they would have to apply because the system has the most ideal leaf area to fruit ratio,” Kurtural said.

Kurtural said growers could easily switch to these high-wire trellis systems without having to replant an entire vineyard. The conversion might take about 18 months.

“This seems like a great way to move into the next century of grape growing,” Kurtural said. More information: Runze Yu et al, Adapting Wine Grape Production to Climate Change through Canopy Architecture Manipulation and Irrigation in Warm Climates,Frontiers in Plant Science (2022). DOI: 10.3389/fpls.2022.1015574 Journal information: Frontiers in Plant Science

Provided by UC Davis Citation: Study shows cabernet grapes can survive climate change (2022, September 29) retrieved 29 September 2022 from https://phys.org/news/2022-09-cabernet-grapes-survive-climate.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

TECH NEWS RELATED

6 of the biggest new Netflix releases coming next week

I hope you’ve cleared out your streaming watchlist, because Netflix is teeing up a slew of new releases over the next several days that will dominate viewership on the platform over the coming week. As we do each weekend, we’ll walk through a curated selection of some of the biggest ...

View more: 6 of the biggest new Netflix releases coming next week

7 Ways to Fix iPhone Calendar Search Not Working

Want to check out the dates of your past or upcoming meeting or travel plans? Or when was your last or next doctor’s appointment? Well, you can search for the appointment and event in your Calendar app. But what if the iPhone Calendar search feature is not working? Well, this ...

View more: 7 Ways to Fix iPhone Calendar Search Not Working

This Wanted Man Finally Gets Arrested After Commenting on Sheriff's Facebook Post

This could be the easiest police manhunt in history. This fugitive from Georgia essentially helped local law enforcement to arrest him after he commented on the Rockdale County Sheriff’s Office’s Facebook page. How About Me? When this sheriff’s office posted a “Most Wanted List” for November, something unexpected happened in ...

View more: This Wanted Man Finally Gets Arrested After Commenting on Sheriff's Facebook Post

Samsung's next-gen OLED screens might support multi-fingerprint sensing

Samsung could usher in the next era of fingerprint sensing technology on OLED displays. The South Korean company is reportedly working on OLED displays with multi-fingerprint sensing technology. Dubbed OLED 2.0, these screens are capable of scanning multiple fingerprints at the same time. This would eliminate the need for ...

View more: Samsung's next-gen OLED screens might support multi-fingerprint sensing

Amazon Basics Office Products and Electronics Are Now Discounted up to 38%

Stock up and save on batteries, surge protectors, memory cards and more with this limited-time deal.

View more: Amazon Basics Office Products and Electronics Are Now Discounted up to 38%

Ye and big tech gave Infowars one of its biggest days ever

Conspiracy theorist Alex Jones has been banned across social media, but this week he still found a megaphone.  Ye — the megastar formerly known as Kanye West — joined Jones’ far-right conspiracy theory outlet Thursday for an interview in which he announced his “love” for Adolf Hitler and Nazis. ...

View more: Ye and big tech gave Infowars one of its biggest days ever

SIM swapper gets 18-months for involvement in $22 million crypto heist

Florida man Nicholas Truglia was sentenced to 18 months in prison on Thursday for his involvement in a fraud scheme that led to the theft of millions from cryptocurrency investor Michael Terpin. The funds were stolen following a January 2018 SIM swap attack that allowed Truglia’s co-conspirators to hijack ...

View more: SIM swapper gets 18-months for involvement in $22 million crypto heist

How to Use the Same WhatsApp Account on Two Phones Officially

WhatsApp is one of the most widely-used instant messaging apps despite lacking several features. For example, Telegram lets you use the same account on multiple devices but unfortunately, the same wasn’t possible on WhatsApp — until now. You can now use the same WhatsApp account on two phones officially! The ...

View more: How to Use the Same WhatsApp Account on Two Phones Officially

Scientists Discover That Binge-Eating Sweet Treats Is Influenced by Gut Microbiome

Bayesian search: A simple rule to find stuff you’ve lost

What We’re Playing: ‘Star Trek Timelines’ Free-to-Play in the Final Frontier

Funko Pop spoils the design of a major MCU Phase 5 villain

Hackers use new, fake crypto app to breach networks, steal cryptocurrency

How to Create and Join Amazon Prime Video Watch Party

Advanced “Lab on a Chip” – Scientists Have Created a Powerful, Ultra-Tiny Spectrometer

Possible that Twitter gave preference to leftists during Brazil election: Elon Musk

Northrop Grumman Unveils US Air Force's B-21 Stealth Nuclear Strategic Bomber

Archaeologists Uncover 1,900-Year-Old Snacks Underneath Rome's Ancient Colosseum

Motorola Edge 30 Fusion Launches In The US With The Most Unique Color Ever

How giant-faced owls snag voles hidden in snow

OTHER TECH NEWS

Top Car News Car News