A new insight into arable weed adaptive evolution: mutations endowing herbicide resistance also affect germination dynamics and seedling emergence

Délye, Christophe; Menchari, Yosra; Michel, Séverine; Cadet, Émilie; Corre, Valérie Le

doi:10.1093/aob/mct018

Cited by 78 publications

(111 citation statements)

References 50 publications

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“…Inconsistent with results mentioned above, Ile1781Leu ACCase conferred a fitness advantage in vigor, tolerance to stress and seed output in Setaria italica produced by gene introgression (Wang et al, 2010). Alopecurus myosuroides containing 1781Leu/ Leu ACCase also showed a fitness advantage in seed germination (Délye et al, 2013). In addition, wide spread of Ile1781Leu ACCase in L. rigidum and across grass species may suggest that Ile1781Leu ACCase usually cause no fitness cost (Délye et al, 2005;Zhang and Powles, 2006;Menchari et al, 2006;Liu et al, 2007;Yu et al, 2007).…”

Section: Fitness Cost Depends On the Mutant Accase Allelesupporting

confidence: 59%

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Effect of herbicide resistance endowing three ACCase mutations on seed germination and viability in American slough grass ( Beckmannia syzigachne Steud. Fernald)

Du¹,

Bai

et al. 2017

Chilean J. Agric. Res.

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Section: Fitness Cost Depends On the Mutant Accase Allelesupporting

confidence: 59%

“…Fresh seed germination test was conducted on the day they were collected. In order to simulate the natural germination time regime of American slough grass, seeds were stored with silica-gel desiccant for 4-mo at room temperature, and then used in stored seed germination test (Délye et al, 2013).…”

Section: Seed Germinationmentioning

confidence: 99%

Effect of herbicide resistance endowing three ACCase mutations on seed germination and viability in American slough grass ( Beckmannia syzigachne Steud. Fernald)

Du¹,

Bai

et al. 2017

Chilean J. Agric. Res.

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“…Com a evolução de populações de difícil controle, o valor adaptativo de alelos resistentes pode ser acompanhado da existência de custos de adaptação, e estes efeitos pleiotrópicos podem ser negativos ou positivos em dado ambiente, dependendo do alelo relacionado (Vila-Aiub et al, 2009b;Délye et al, 2013b). Um exemplo de alteração no valor adaptativo pode ser observado na espécie Lolium rigidum Gaudin, com mecanismo de resistência causado pelo aumento do metabolismo mediado por P450, o qual apresenta reduzidas taxa de crescimento relativo (TCR) e taxa de assimilação líquida (TAL), bem como menor habilidade de competição (Vila-Aiub et al, 2009a).…”

Section: Introductionunclassified

Valor adaptativo e habilidade competitiva de azevém resistente e suscetível ao iodosulfuron em competição com o trigo

Mariani

Várgas

Agostinetto

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi identificar e comparar valores adaptativos dos biótipos de azevém (Lolium multiflorum) resistente e suscetível ao herbicida iodosulfuron e avaliar sua habilidade competitiva com o trigo (Triticum aestivum). Para avaliar o valor adaptativo, os biótipos foram semeados em vasos e coletados a cada 10 dias após a emergência, até os 80 dias. Em cada coleta, avaliaram-se estatura, área foliar e massa seca da parte aérea, e, a partir destas avaliações, foram calculadas variáveis indiretas para comparar o crescimento entre os biótipos. A habilidade competitiva foi determinada em experimento de série de substituição, tendo-se variado a proporção da cultura e do competidor. As proporções testadas foram: 100:0 (estande puro do trigo), 75:25, 50:50, 25:75 e 0:100% (estande puro do biótipo de azevém resistente ou suscetível); já as variáveis avaliadas foram área foliar e massa seca. Os resultados dos estudos comparativos de crescimento mostraram similaridade entre os biótipos de azevém resistente e suscetível ao iodosulfuron, o que não caracterizou efeito pleiotrópico decorrente da resistência. Quanto à habilidade competitiva, a competição interespecífica é prejudicial para o biótipo resistente, enquanto, para o biótipo suscetível, independe o competidor. A cultura do trigo mostra habilidade competitiva superior a dos biótipos de azevém resistente e suscetível.Termos para indexação: Lolium multiflorum, Triticum aestivum, competição interespecífica, herbicida, planta daninha.Adaptive value and competitive ability of ryegrass resistant and susceptible to iodosulfuron in competition with wheat Abstract -The objective of this work was to identify and compare adaptive values of ryegrass (Lolium multiflorum) biotypes resistant and susceptible to the herbicide iodosulfuron and to evaluate their competitive ability with wheat (Triticum aestivum). To evaluate the adaptive value, the biotypes were sown in pots and collected every 10 days after emergence, up to 80 days. At each collection, height, leaf area, and dry matter of shoots were assessed, and, from these evaluations, indirect variables were calculated to compare the growth between the biotypes. The competitive ability was determined in a replacement series experiment, varying the proportion of the culture and of the competitor. The proportions tested were: 100:0 (wheat in pure stand), 75:25, 50:50, 25:75, and 0:100% (resistant or susceptible ryegrass biotype under pure stand); the evaluated variables were leaf area and dry matter. The results of the comparative studies of growth showed similarity between ryegrass biotypes resistant and susceptible to iodosulfuron, which does not characterize pleitropic effect due to resistance. Regarding competitive ability, interspecific competition is harmful to the resistant biotype, whereas, for the susceptible biotype, there is no effect of the competitor. The wheat crop shows greater competitive ability than resistant and susceptible ryegrass biotypes.Index terms: Lolium multiflorum, Triticum aestivu...

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“…Alleles that generate resistance to herbicides can cause pleiotropic effects in the life cycle of a plant, with germination being the sum of the effect of these alleles and environmental effects. This effect has already been reported for some cases of weed resistance to herbicides inhibiting ACCase (Vila-Aiub et al, 2011;Délye et al, 2013). The selection of weed biotypes resistant to glyphosate has increased in recent years (Heap, 2016).…”

Section: Emergence (%)mentioning

confidence: 66%

Effects of Environmental Factors on Seed Germination and Emergence of Glyphosate Resistant and Susceptible Sourgrass

2017

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-Sourgrass is one of the most problematic weeds of Brazil. It is an aggressive species in the allocation of resources from the environment and reported to be glyphosate resistant in several states of the country. This work has aimed to verify environmental effects on seed germination and seedling emergence of sourgrass. Laboratory and field trials were conducted to determine the effects of temperature, light, photoperiod, water availability and depth of burial in germination and emergence of seeds. The maximum germination was greater than 80% for seed originated from resistant plants between 15 and 30 o C. For the susceptible ones, the maximum germination occurred only at 30 o C. Germination occurred for both biotypes independent of the presence of light. The best photoperiod for germination of both biotypes was between 8 and 14 hours. Seeds originated from resistant plants showed higher germination levels at low temperatures in the presence of light and in less water availability. There was no germination from -0,8 MPa for both biotypes. The emergence for both biotypes was low, indicating that seed burial could be used in the management of the species. Seeds from resistant plants showed higher and larger germination in temperatures, water content and depth of burial ranges than from originated from susceptible plants.Keywords: Digitaria insularis, water availability, photoperiod, seeds, temperature. RESUMO -O capim-amargoso é uma das espécies mais problemáticas da agricultura brasileira. É uma espécie agressiva na alocação de recursos do meio

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A new insight into arable weed adaptive evolution: mutations endowing herbicide resistance also affect germination dynamics and seedling emergence

Cited by 78 publications

References 50 publications

Effect of herbicide resistance endowing three ACCase mutations on seed germination and viability in American slough grass ( Beckmannia syzigachne Steud. Fernald)

Effect of herbicide resistance endowing three ACCase mutations on seed germination and viability in American slough grass ( Beckmannia syzigachne Steud. Fernald)

Valor adaptativo e habilidade competitiva de azevém resistente e suscetível ao iodosulfuron em competição com o trigo

Effects of Environmental Factors on Seed Germination and Emergence of Glyphosate Resistant and Susceptible Sourgrass

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