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Assessment of induced allelopathy in crop-weed co-culture with rye-pigweed model
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Journal Article
Assessment of induced allelopathy in crop-weed co-culture with rye-pigweed model
2024
Overview
This study evaluates induced allelopathy in a rye-pigweed model driven by rye’s (
Secale cereale
L.) allelopathic potential as a cover crop and pigweed’s (
Amaranthus retroflexus
L.) notoriety as a weed. The response of rye towards pigweed’s presence in terms of benzoxazinoids (BXs) provides valuable insight into induced allelopathy for crop improvement. In the 2 week plant stage, pigweed experiences a significant reduction in growth in rye’s presence, implying allelopathic effects. Rye exhibits increased seedling length and BXs upsurge in response to pigweed presence. These trends persist in the 4 week plant stage, emphasizing robust allelopathic effects and the importance of different co-culture arrangements. Germination experiments show rye’s ability to germinate in the presence of pigweed, while pigweed exhibits reduced germination with rye. High-performance liquid chromatography with diode-array detection (HPLC-DAD) analysis identifies allelopathic compounds (BXs), 2,4-dihydroxy-1,4-benzoxazin-3-one (DIBOA) and 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA) in rye. Rye significantly increases BX production in response to pigweed, age-dependently. Furthermore, pigweed plants are screened for possible BX uptake from the rhizosphere. Results suggest that allelopathy in rye-pigweed co-cultures is influenced by seed timing, and age-dependent dynamics of plants’ allelopathic compounds, providing a foundation for further investigations into chemical and ecological processes in crop-weed interactions.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Springer Science and Business Media LLC,Nature Portfolio
Subject
/ Amaranthus - growth & development
/ Chimie
/ Coculture Techniques - methods
/ Crops
/ Crops, Agricultural - growth & development
/ High-performance liquid chromatography
/ Humanities and Social Sciences
/ Physical, chemical, mathematical & earth Sciences
/ Physique, chimie, mathématiques & sciences de la terre
/ Science
/ Secale
/ Seedlings - growth & development
/ Weeds
