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Weed-induced yield loss through resource competition cannot be sidelined.
Trends Plant Sci
December 2023
Agroécologie, INRAE, Institut Agro, Université Bourgogne, Université Bourgogne Franche-Comté, F-21000 Dijon, France.
Weed-induced changes in the maize root transcriptome reveal transcription factors and physiological processes impacted early in crop-weed interactions.
AoB Plants
June 2023
Sunflower and Plant Biology Research Unit, USDA-ARS-ETSARC, 1616 Albrecht Blvd., Fargo, ND 58102, USA.
A new paradigm suggests weeds primarily reduce crop yield by altering crop developmental and physiological processes long before the weeds reduce resources through competition. Multiple studies have implicated stress response pathways are activated when crops such as maize are grown in close proximity with weeds during the first 4-8 weeks of growth-the point at which weeds have their greatest impact on subsequent crop yields. To date, these studies have mostly focused on the response of above-ground plant parts and have not examined the early signal transduction processes associated with maize root response to weeds.
View Article and Find Full Text PDFWeed-induced crop yield loss: a new paradigm and new challenges.
Trends Plant Sci
May 2023
USDA-ARS Edward T. Schafer Agricultural Research Center, Fargo, ND, USA.
Direct competition for resources is generally considered the primary mechanism for weed-induced yield loss. A re-evaluation of physiological evidence suggests weeds initially impact crop growth and development through resource-independent interference. We suggest weed perception by crops induce a shift in crop development, before resources become limited, which ultimately reduce crop yield, even if weeds are subsequently removed.
View Article and Find Full Text PDFO pollution in a future climate increases the competition between summer rape and wild mustard.
Plant Physiol Biochem
February 2019
Vytautas Magnus University, Department of Environmental Sciences, Vileikos St. 8-223, LT-44404, Kaunas, Lithuania.
The initial aim of this study was to evaluate an effect of elevated CO concentration and air temperature (future climate) and O pollution on mono- and mixed-culture grown summer rape (Brassica napus L.) and wild mustard (Sinapis arvensis L.).
View Article and Find Full Text PDFChanges in light quality alter physiological responses of soybean to thiamethoxam.
Planta
September 2016
Department of Plant Agriculture, University of Guelph, 50 Stone Rd. East, Guelph, ON N1G 2W1, Canada.
The interaction between neighboring weed-induced far-red enriched light and thiamethoxam can significantly alter soybean seedling morphology, nodulation, isoflavone levels, UV-absorbing phenolics, and carbon and nitrogen content. Neonicotinoid insecticides that are widely used on major crop plants can enhance plant growth and yield. Although the underlying mechanism of this enhanced growth and yield is not clear, recent studies suggest that neonicotinoids such as thiamethoxam (TMX) may exert their effects at least in part via signals that involve salicylic acid (SA) and jasmonic acid (JA).
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