Factors of tolerance to rimsulfuron in four pepper (<i>Capsicum annum</i> L.) lines

Scarponi, Luciano; Esposito, Alessandro; Tomassini, Carlo

doi:10.1051/agro:2001134

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…There could be varietal differences in rimsulfuron tolerance among pepper cultivars (Scarponi et al 2001). Although we did not investigate varietal differences in tolerance, our results on pepper sensitivity to rimsulfuron corroborates this study.…”

Section: Rimsulfuron and Terbufos Interactionssupporting

confidence: 84%

Physiological basis for differential tolerance of tomato and pepper to rimsulfuron and halosulfuron: site of action study

Buker¹,

Rathinasabapathi

Stall

et al. 2004

Weed sci.

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Tomato and pepper differ in their whole-plant tolerance to sulfonylurea (SU) herbicides rimsulfuron and halosulfuron despite both being members of the Solanaceae family. This study examined whether tomato's tolerance to SU herbicides rimsulfuron and halosulfuron was due to insensitivity of the target enzyme acetolactate synthase (ALS). Rimsulfuron and halosulfuron inhibited ALS from both tomato and pepper leaves. Enzyme inhibition and kinetic analyses showed that extractable ALS from tomato was more sensitive to rimsulfuron and halosulfuron than ALS from pepper. ALS from both species were inhibited with a mixed inhibition pattern. Thus, results indicate that enzyme insensitivity is not the reason why tomato is more tolerant than pepper to these herbicides. Tomato tolerance to rimsulfuron at the whole-plant level was reduced in the presence of terbufos, a known inhibitor of cytochrome P450 enzymes. Rimsulfuron applied at 0.018 and 0.035 kg ha−1with 1.1 kg ha−1of terbufos reduced tomato shoot weight 69 and 66%, respectively, compared with a 4 and 29% reduction when rimsulfuron was applied alone. The reduction of tomato tolerance to rimsulfuron by terbufos suggests that the sensitivity differences between these species may reflect their differences in SU herbicide metabolism.

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Section: Rimsulfuron and Terbufos Interactionssupporting

confidence: 84%

Physiological basis for differential tolerance of tomato and pepper to rimsulfuron and halosulfuron: site of action study

Buker¹,

Rathinasabapathi

Stall

et al. 2004

Weed sci.

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“…Additionally, tolerance of tomato to a SU herbicide does not imply that bell pepper will also have tolerance (Buker et al 2004). For example, bell pepper tolerance to rimsulfuron POST was not satisfactory in field and greenhouse studies (Ackley et al 1998), and different cultivars may exhibit different tolerance levels to rimsulfuron (Scarponi et al 2001). Tomato is tolerant of imazosulfuron applied POST-DIR (Jennings, 2010) and trifloxysulfuronsodium and thifensulfuron-methyl applied POST-DIR (Buckelew et al 2007).…”

mentioning

confidence: 99%

Bell Pepper (Capsicum annuum) Tolerance to Imazosulfuron and Thifensulfuron-Methyl

Pekarek¹,

Monks²,

Jennings³

et al. 2013

Weed technol.

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Greenhouse and field studies were conducted to evaluate bell pepper tolerance to the sulfonylurea herbicides imazosulfuron and thifensulfuron-methyl. Imazosulfuron was applied at 56, 112, 224, 336, or 448 g ai ha−1. Thifensulfuron-methyl was applied at 2.6, 5.3, 10.5, 21.0, or 31.6 g ai ha−1. In the greenhouse over 2 yr, bell pepper injury due to imazosulfuron POST ranged from 12 to 27%. Reductions in plant height and numbers of nodes, buds, flowers, and fruits were generally minor or not observed. Injury from thifensulfuron-methyl POST ranged from 40 to 60% in the greenhouse. Similar trends were observed for leaf chlorosis and distortion. Thifensulfuron-methyl tended to decrease numbers of buds, flowers, and fruits in the greenhouse. In the field at three sites, bell pepper injury due to imazosulfuron applied POST-directed (POST-DIR) was less than 10% at all rating times, and height and yield were not affected. Total and marketable yield averaged 40,300 and 35,810 kg ha−1, respectively, across environments and years. Bell pepper injury from thifensulfuron-methyl applied POST-DIR in the field was less than 20% with all rates and less than 10% when rates less than 10.6 g ai ha−1 thifensulfuron-methyl were applied. Bell pepper stand (plants ha−1) or height was not affected by thifensulfuron-methyl. Thifensulfuron-methyl did not affect total bell pepper yield (39,310 kg ha−1 averaged across environments); however, reductions in Fancy grade yield were observed. No. 1 and cull yield grades tended to increase with increasing thifensulfuron-methyl rate, apparently compensating for lost Fancy yield.

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“…It is mainly due to the following factors: a rapid metabolic detoxification [2,5], a low sensitivity of ALS [7,9], and an overproduction of ALS [3,12]. In a previous study we ascertained that R was tolerated to varying degrees by some pepper lines owing to different sensitivity and activity of the ALS they contain [20]. Therefore, the present research was performed to assess the degree of tolerance to R in five commercial maize hybrids through the relationship between the herbicide persistence in them and the behavior of the ALS they contain.…”

Section: Introductionmentioning

confidence: 99%

Tolerance degree of some maize (Zea mays) hybrids to rimsulfuron1

Scarponi¹,

Vischetti²

2001

Agronomie

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The degree of tolerance to the sulfonylurea herbicide rimsulfuron (R) was investigated in five different commercial maize hybrids: Sirena (Si), Sara (Sa), Eleonora (El), Gitana (Gi) and Lucia (Lu). The susceptibility of the hybrids to R treatment was investigated by checking their protein content and evaluating R persistence in the maize hybrids as well as the activity and kinetic parameters of the target enzyme they contain, acetolactate syntase (ALS). 72 hours after treatment, decreases in the protein content were considerable in Gi and Lu, moderate in El, and not significant in Si and Sa. At the same time El, Lu and Gi exhibited significant R residues, while the herbicide was completely metabolized in Si and Sa. The values of extractable ALS activity in the untreated hybrids ("native" ALS)-with and without R addition in the reaction mixture-and in the R-treated hybrids, together with the ALS V max and K M parameters of the untreated and R-treated hybrids, evidenced varying degrees of tolerance to R among the hybrids. Despite the susceptibility of "native" ALS in all of the hybrids to R, Si and Sa appeared to overcome the action of R through a rapid detoxifying capability, and El through an ability to produce more ALS enzymes in response to R treatment. Gi and Lu exhibited a lower tolerance to R since they were unable to activate any of the above mechanisms. rimsulfuron / maize hybrids / acetolactate syntase / activity and kinetic parameters / tolerance degree Résumé-Degré de tolérance au rimsulfuron de certains hybrides de maïs. Le degré de tolérance à l'herbicide sulfonyl-urée rimsulfuron (R) a été étudié chez cinq hybrides différents de maïs Sirena (Si), Sara (Sa), Eleonora (El), Gitana (Gi) et Lucia (Lu). Pour étudier la sensibilité des hybrides au traitement avec R, on a contrôlé leur teneur en protéines et évalué les paramètres cinétiques et d'activité de l'enzyme-cible qu'ils contiennent, l'acétolactate synthétase (ALS). Soixante douze heures après le traitement, on a relevé une diminution considérable de la teneur en protéines chez Gi et Lu, modérée chez El et non significative chez Si et Sa. Dans le même temps, El, Lu et Gi ont montré des résidus significatifs de R, tandis que l'herbicide avait été complètement métabolisé chez Si et Sa. Les valeurs de l'activité d'ALS que l'on a pu relever dans les hybrides non traités (ALS « à l'état natif »)-avec ou sans adjonction de R dans le mélange de réaction-et dans les hybrides traités avec R, ainsi que les valeurs des paramètres V max et K M d'ALS des hybrides non traités et traités avec R ont permis de relever des degrés variables de tolérance à R parmi les hybrides. Malgré la sensibilité envers R de l'ALS « à l'état natif » de tous les hybrides, on a pu voir que Si et Sa surmontaient l'action de R par le biais d'une capacité de métabolisation rapide, et El grâce à sa capacité de produire davantage d'enzymes ALS en réponse au traitement avec R. Par contre, Gi et Lu, incapables d'activer les mécanismes ci-dessus, ont donc fait apparaître une tolérance moindre...

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Factors of tolerance to rimsulfuron in four pepper (Capsicum annum L.) lines

Cited by 3 publications

References 18 publications

Physiological basis for differential tolerance of tomato and pepper to rimsulfuron and halosulfuron: site of action study

Physiological basis for differential tolerance of tomato and pepper to rimsulfuron and halosulfuron: site of action study

Bell Pepper (Capsicum annuum) Tolerance to Imazosulfuron and Thifensulfuron-Methyl

Tolerance degree of some maize (Zea mays) hybrids to rimsulfuron1

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