Abscisic-acid in triazine-resistant and susceptible poa annua

Touraud, G.; Leydecker, Marie‐Thérèse; Darmency, Henri

doi:10.1016/0168-9452(87)90003-3

Cited by 6 publications

(6 citation statements)

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“…In the third scenario, herbicide resistance can lead to higher seed dormancy due to direct linkage, 66,67 though very rare, 68 or indirectly through pleiotropic effects 32,69 . In the fourth scenario, it is possible that a random genetic drift event might have accidentally eliminated the low‐dormant proportion, leading to high seed dormancy in an already resistant population.…”

Section: Resultsmentioning

confidence: 99%

“…Resistance conferring mutations can sometimes be linked to seed biochemical compositions that alter seed germination dynamics. For example, higher percentage of trans ‐hexadecenoic acid in the phosphatidyldiacylglycerol was found to be associated with triazine resistance in Chenopodium album , 74 and higher levels of branched chain amino acids have been reported in sulfonylurea‐resistant Lactuca sativa , 75 whereas lower rates of abscisic acid occur in triazine‐resistant Poa annua 69 and ALS‐inhibitor‐resistant Sinapis arvensis 67 . The lack of ecological and biochemical investigations in this study limits our ability to draw solid conclusions as to the specific mechanisms attributable to the association between high seed dormancy and herbicide resistance.…”

Section: Resultsmentioning

confidence: 99%

“…25 In the third scenario, herbicide resistance can lead to higher seed dormancy due to direct linkage, 66,67 though very rare, 68 or indirectly through pleiotropic effects. 32,69 In the fourth scenario, it is possible that a random genetic drift event might have accidentally eliminated the low-dormant proportion, leading to high seed dormancy in an already resistant population. This is an unlikely possibility in the populations investigated here because of the relatively higher frequency of populations showing the association than what would be typically expected with random genetic drift.…”

Section: Correlation Between Seed Traits and Herbicide Resistancementioning

confidence: 99%

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Seed traits correlate with herbicide resistance in Italian ryegrass (Lolium perenne ssp. multiflorum)

Maity

Singh

Jessup

et al. 2021

Pest Management Science

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BACKGROUND Italian ryegrass (Lolium perenne ssp. multiflorum) is one of the major winter annual weeds worldwide. In this research, diversity for seed morpho‐physiological traits such as seed weight, seed size, awnedness, dormancy, speed of germination, and seed vigor among Italian ryegrass populations collected from the Texas Blacklands region were assessed, and potential association with herbicide resistance was investigated. RESULTS A high degree of diversity was observed among the populations for 100‐seed weight (125–256 mg), seed length (4.8–6.6 mm), awn length (0–6 mm), and total seedling length (9–14 cm at 21 days after seed germination). Inter‐population range for seed dormancy was higher in the freshly harvested seed (31–85%), which reduced to 18 to 62% at 9 months after harvest. Populations with high initial seed dormancy (> 70% dormancy) released dormancy at a faster rate than the low dormancy group (< 40%). Percent survival status to multiple postemergence herbicides was positively correlated with 100‐seed weight and fresh or initial seed dormancy. CONCLUSION Early emerging cohorts are easily controlled by pre‐plant tillage and preemergence herbicides, whereas late emerging cohorts (facilitated by seed dormancy) are exposed to postemergence herbicides wherein greater opportunities exist for resistance evolution, likely explaining the occurrence of high seed dormancy in Italian ryegrass populations resistant to postemergence herbicides. High seed weights can further allow seedling emergence from greater burial depth, thereby exposing more seedlings to postemergence herbicides and increasing the likelihood of resistance evolution. Results provide unique insights into the association between seed traits and herbicide resistance in this species. © 2021 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Correlation Between Seed Traits and Herbicide Resistancementioning

confidence: 99%

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Seed traits correlate with herbicide resistance in Italian ryegrass (Lolium perenne ssp. multiflorum)

Maity

Singh

Jessup

et al. 2021

Pest Management Science

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“…Triazine resistance was shown to change the fatty acid proportions in the phosphatidyldiacylglycerol pool of leaves of R Chenopodium album compared to isogenic S ones, 15 which could change the lipid composition of the seeds and thus affect germination dynamics as observed in other studies. 16 Similarly, lower rates of abscisic acid were reported in reciprocal triazine R and S hybrid seeds of Poa annua, 17 which could contribute to differential germination dynamics, but again not in a context of triazine resistance. 18 However, the most likely hypothesis in the three studies using appropriate methods (supporting information 1) was a mere linkage.…”

Section: Pleiotropymentioning

confidence: 95%

Relationship between weed dormancy and herbicide rotations: implications in resistance evolution

Darmency

Colbach

Corre

2017

Pest Management Science

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It is suggested that selection for late germinating seed cohorts is significantly associated with herbicide resistance in some cropping systems. In turn, it is conceivable that rotating herbicide modes of action selects for populations with mutations for increased secondary dormancy, thus partially overcoming the delaying effect of rotation on resistance evolution. Modified seed dormancy could affect management strategies - like herbicide rotation - that are used to prevent or control herbicide resistance. Here, we review the literature for data on seed dormancy and germination dynamics of herbicide-resistant versus susceptible plants. Few studies use plant material with similar genetic backgrounds, so there are few really comparative data. Increased dormancy and delayed germination may co-occur with resistance to ACCase inhibitors, but there is no clear-cut link with resistance to other herbicide classes. Population shifts are due in part to pleiotropic effects of the resistance genes, but interaction with the cropping system is also possible. We provide an example of a model simulation that accounts for genetic diversity in the dormancy trait, and subsequent consequences for various cropping systems. We strongly recommend adding more accurate and detailed mechanistic modelling to the current tools used today to predict the efficiency of prevention and management of herbicide resistance. These models should be validated through long-term experimental designs including mono-herbicide versus chemical rotation in the field. © 2017 Society of Chemical Industry.

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“…This could be due to the fact that the triazine resistance character in M5 is maternally inherited and known to be correlated with a reduced rate of electron transfer at the photosystem II level (Gasquez & Darmency, 1983), a lower photosynthetic efficiency, and a lower growth rate (Holt, 1990). Hormonal control may also be involved, since differences in abscissic acid content between M5 and SI have been detected in leaves (nuclear inheritance) and seeds (cytoplasmic effect) (Touraud, Leydecker & Darmency, 1987).…”

Section: Experiments Imentioning

confidence: 99%

Association of esterase isozymes with morphology in F₂ progenies of two growth variants in Poa annua L.

Darmency

Berti²,

Gasquez

et al. 1992

New Phytologist

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SUMMARYThe morphology, flowering behaviour and esterase genotype was examined for six F.^ progenies of hybrids between the two main variants oi Poa annua L. (namely, annual-erect and perennial-prostrate). The association of flowering time with leaf and tiller morphology and Est 1 allozyme genotype, previously described for the two variants in populations from Burgundy, was fully broken in the F.^ generation, indicating that no linkage blocks were involved. Whether selection maintains the association of isozyme genotype and growth form is discussed.

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Abscisic-acid in triazine-resistant and susceptible poa annua

Cited by 6 publications

References 6 publications

Seed traits correlate with herbicide resistance in Italian ryegrass (Lolium perenne ssp. multiflorum)

Seed traits correlate with herbicide resistance in Italian ryegrass (Lolium perenne ssp. multiflorum)

Relationship between weed dormancy and herbicide rotations: implications in resistance evolution

Association of esterase isozymes with morphology in F₂ progenies of two growth variants in Poa annua L.

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Abscisic-acid in triazine-resistant and susceptible poa annua

Cited by 6 publications

References 6 publications

Seed traits correlate with herbicide resistance in Italian ryegrass (Lolium perenne ssp. multiflorum)

Seed traits correlate with herbicide resistance in Italian ryegrass (Lolium perenne ssp. multiflorum)

Relationship between weed dormancy and herbicide rotations: implications in resistance evolution

Association of esterase isozymes with morphology in F2 progenies of two growth variants in Poa annua L.

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Association of esterase isozymes with morphology in F₂ progenies of two growth variants in Poa annua L.