Slight climate change can reduce drought effect in wheat

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article

Increased carbon dioxide levels caused by climate change may help wheat cope with drought, according to researchers at The University of Western Australia. 

In a world-first study, PhD student Eduardo Dias de Oliveira found that when wheat is exposed to more CO2, it is better able to cope with high temperatures and water restrictions.

As long as the temperature does not rise 2ºC more than average, combining the effects of elevated carbon dioxide and high temperature with water restrictions actually improves biomass and grain yield.

Dias de Oliveira's finding could have significant impact on the future of crop production in the Mediterranean-type climatic wheat-growing regions of Australia, where climate change is expected to have a severe impact on annual yields of 20 million tonnes of wheat over the next 50 years.

Dias de Oliveira compared three scenarios in specially designed tunnel houses at UWA's Shenton Park Research Station with and without drought and elevated CO2 conditions at 2ºC, 4ºC and 6ºC above ambient temperature.

Two bread-wheat genotypes, the vigorous line 38-19 and the non-vigorous cultivar Janz, were grown in the tunnel houses.  Janz is a high yielding semi-dwarf cultivar widely adapted in Australia.

The scientists expected to find that higher CO2 and temperatures could compensate for the negative effect of end-of-season drought on biomass and grain yield in wheat through an increase in the rate of leaf photosynthesis and biomass.

Research co-author Winthrop Professor Kadambot Siddique said what they found was that while at 2ºC above ambient temperature, yields were indeed enhanced regardless of whether they were well-watered or not, the combination of elevated CO2 at 4ºC or 6ºC above the ambient temperature tended to decrease wheat biomass and grain yield.

"Our studies unravelled the impact of interaction between elevated CO2, high temperature and water stress in wheat. The vital information generated from the project will help towards developing climate ready wheat for the future," Professor Siddique said.  The PhD project is supported by UWA, CSIRO and Department of Agriculture, Forestry and Fisheries (DAFF).

More information: The paper: "Can elevated CO2 combined with high temperature ameliorate the effect of terminal drought in wheat?" has been published in the journal Functioning Plant Biology.


Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


Direct Drive Rotary Blender

The Doyle 8, 10, 13, & 16 ton Direct Drive Rotary Blender’s are the industry’s fastest rotary blenders. These units ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form