Annual ryegrass (Lolium rigidum Gaud) competition altered wheat grain quality : A study under elevated atmospheric CO₂ levels and drought conditions

Journal article


Fernando, Nimesha, Florentine, Singarayer K., Naiker, Mani, Panozzo, Joe and Chauhan, Bhagirath S.. (2019) Annual ryegrass (Lolium rigidum Gaud) competition altered wheat grain quality : A study under elevated atmospheric CO₂ levels and drought conditions. Food Chemistry. 276, pp. 285-290. https://doi.org/10.1016/j.foodchem.2018.09.145
AuthorsFernando, Nimesha, Florentine, Singarayer K., Naiker, Mani, Panozzo, Joe and Chauhan, Bhagirath S.
Abstract

Annual ryegrass is one of the most serious, costly weeds of winter cropping systems in Australia. To determine whether its competition-mediated plant defence mechanisms effect on wheat grain quality, wheat (cv. Yitpi) and annual ryegrass were grown under two levels of CO₂ (400 ppm; (a[CO₂]) vs 700 ppm; (e[CO₂]), two levels of water (well-watered vs drought) and two types of competition (wheat only; (W), and wheat × annual ryegrass; (W × R) with four replicates. The competition × [CO₂] interaction had a significant effect on wheat grain protein content, where it was increased in W × R under both e[CO₂] (+17%) and a[CO₂] (+21%). Grain yield, total grain reducing power and phenolic content were significantly affected by [CO₂] × drought × competition. In a summary, annual ryegrass competition significantly altered the wheat grain quality under both [CO₂] levels (depending on the soil water level), while also decreasing the grain yield.

Keywordswheat grain quality; wheat; annual ryegrass; weed competition; grain protein concentration; grain total reducing power; grain total phenolics
Year2019
JournalFood Chemistry
Journal citation276, pp. 285-290
PublisherElsevier BV
ISSN0308-8146
Digital Object Identifier (DOI)https://doi.org/10.1016/j.foodchem.2018.09.145
Scopus EID2-s2.0-85054464390
Research or scholarlyResearch
Page range285-290
Publisher's version
License
All rights reserved
File Access Level
Controlled
Output statusPublished
Publication dates
Online25 Sep 2018
Publication process dates
Accepted24 Sep 2018
Deposited12 May 2021
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