Genetic potential of rice under alternate-wetting-and-drying irrigation management for barnyardgrass (<i>Echinochloa crus-galli</i>) suppression and grain yield production

Gealy, David R.; Rohila, Jai S.; Boykin, Debbie

doi:10.1017/wsc.2019.24

Cited by 10 publications

(6 citation statements)

References 42 publications

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“…6a), no conclusion about allelopathy was presented. Indeed, for these articles, authors had objectives different from ours (e.g., comparison of different cropping systems (Gealy et al 2003(Gealy et al , 2019).…”

Section: What Did Authors Conclude?mentioning

confidence: 94%

Deciphering field-based evidences for crop allelopathy in weed regulation. A review

Mahé

Chauvel

Colbach

et al. 2022

Agron. Sustain. Dev.

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It is now essential to reduce the negative impacts of weed management and especially herbicide use. Weed-suppressive crop species/varieties hold promise for integrated and sustainable weed regulation. Competition for resources and allelopathy are the two main underlying mechanisms. Unlike competition, which is well studied and established, allelopathy by living crops remains a contentious mechanism. A major difficulty to demonstrate the effects of allelopathy in the field is to dissociate them from those of competition. Here, we systematically and quantitatively review the literature, searching for field-based evidence of the role of allelopathy (by root exudation of living crops) in weed regulation, independently of competition, focusing on studies comparing different varieties of a given crop species. Our critical literature analysis also aims to identify weaknesses and strengths in methodology, providing insights on optimal experimental designs and avenues for future research. Our main conclusions are: (1) in most articles, the role of crop competition is disregarded or not exhaustively studied. Consequently, contrary to authors’ conclusions, it cannot be determined whether weed regulation is due to allelopathy and/or to competition. (2) Few articles provided convincing evidence of the presence/absence of allelopathy in the field. (3) To further investigate allelopathy in the field we recommend to (i) finely characterize crop competition by measuring traits in the field, (ii) assess crop allelopathic potential with complementary experiments in controlled conditions or by quantifying allelochemicals in the field, and (iii) quantify the contribution of each studied trait/mechanism in explaining weed regulation in the field with multiple regression models. In conclusion, the consistent use of the suggested guidelines, as well as alternative approaches (e.g., creation of varieties with deactivated allelopathic functions, development of process-based simulation models), may provide a basis for quantifying the role of allelopathy in the field and, subsequently, for designing weed management strategies promoting weed biological regulation.

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Section: What Did Authors Conclude?mentioning

confidence: 94%

Deciphering field-based evidences for crop allelopathy in weed regulation. A review

Mahé

Chauvel

Colbach

et al. 2022

Agron. Sustain. Dev.

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show abstract

“…There is a wealth of information on allelopathic rice interference with paddy weeds under field situations and controlled conditions (Gealy, Rohlla, & Boykin, 2019; Kato‐Noguchi, 2011; Kong et al, 2008; Li, Zhao, & Kong, 2020). However, when it comes to the role of kin recognition in allelopathic rice interference with paddy weeds, there is a lack of data.…”

Section: Introductionmentioning

confidence: 99%

Intra‐specific kin recognition contributes to inter‐specific allelopathy: A case study of allelopathic rice interference with paddy weeds

You

Cheng

Kong

et al. 2021

Plant Cell & Environment

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Summary Species interactions and mechanisms affect plant coexistence and community assembly. Despite increasing knowledge of kin recognition and allelopathy in regulating inter‐specific and intra‐specific interactions among plants, little is known about whether kin recognition mediates allelopathic interference. We used allelopathic rice cultivars with the ability for kin recognition grown in kin versus non‐kin mixtures to determine their impacts on paddy weeds in field trials and a series of controlled experiments. We experimentally tested potential mechanisms of the interaction via altered root behaviour, allelochemical production and resource partitioning in the dominant weed competitor, as well as soil microbial communities. We consistently found that the establishment and growth of paddy weeds were more inhibited by kin mixtures compared to non‐kin mixtures. The effect was driven by kin recognition that induced changes in root placement, altered weed carbon and nitrogen partitioning, but was associated with similar soil microbial communities. Importantly, genetic relatedness enhanced the production of intrusive roots towards weeds and reduced the production of rice allelochemicals. These findings suggest that relatedness allows allelopathic plants to discriminate their neighbouring collaborators (kin) or competitors and adjust their growth, competitiveness and chemical defense accordingly.

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“…There is a wealth of information on allelopathic rice interference with paddy weeds under field situations and controlled conditions (Gealy, Rohlla, & Boykin, 2019;Kato-Noguchi, 2011;Kong, Hu, Wang, & Wu, 2008;Li, Zhao, & Kong, 2020). However, when it comes to the role of kin recognition in allelopathic rice interference with paddy weeds, there is a lack of data.…”

Section: Introductionmentioning

confidence: 99%

Intraspecific kin recognition contributes to interspecific allelopathy：A case study of allelopathic rice interference with paddy weeds

You

Cheng

Kong

et al. 2021

Preprint

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Species interactions and mechanisms affect plant coexistence and community assembly. Despite increasing knowledge of kin recognition and allelopathy in regulating interspecific and intraspecific interactions among plants, little is known about whether kin recognition mediates allelopathic interference. We used allelopathic rice cultivars with the ability for kin recognition grown in kin vs. non-kin mixtures to determine their impacts on paddy weeds in field trials and a series of controlled experiments. We experimentally tested potential mechanisms of the interaction via altered root behavior, allelochemical production, and soil microbial community composition, as well as carbon and nitrogen partitioning in the weeds. We consistently found that the establishment and growth of paddy weeds were more inhibited by kin mixtures compared to non-kin mixtures. The effect was driven by kin recognition that induced altered root placement, established similar soil microbial communities, and altered weed carbon and nitrogen partitioning. Importantly, genetic relatedness enhanced the production of intrusive roots towards weeds and reduced the production of rice allelochemicals. These findings suggest that relatedness allows allelopathic plants to discriminate their neighboring collaborators (kin) or competitors and then adjust their growth, competitiveness and chemical defense accordingly.

show abstract

Genetic potential of rice under alternate-wetting-and-drying irrigation management for barnyardgrass (Echinochloa crus-galli) suppression and grain yield production

Cited by 10 publications

References 42 publications

Deciphering field-based evidences for crop allelopathy in weed regulation. A review

Deciphering field-based evidences for crop allelopathy in weed regulation. A review

Intra‐specific kin recognition contributes to inter‐specific allelopathy: A case study of allelopathic rice interference with paddy weeds

Intraspecific kin recognition contributes to interspecific allelopathy：A case study of allelopathic rice interference with paddy weeds

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