Photosynthetic Performance of Glyphosate Resistant and Glyphosate Susceptible Hairy Fleabane under Light Intensity

Silva, D.R.O.; Várgas, Leandro; Agostinetto, Dirceu; Santos, Fernando Machado dos

doi:10.1590/s0100-83582017350100087

Cited by 5 publications

(6 citation statements)

References 22 publications

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“…Vivancos et al [71] observed that photosynthesis is unaffected by glyphosate in tolerant soybeans, whereas it is rapidly inhibited in sensitive genotypes subjected to glyphosate treatment. The photosynthetic parameters of the herbicide-tolerant genotype are superior to those of the sensitive genotype of hairy fleabane [72]. The bentazone-tolerant cultivar Williams 82 exhibits symptoms 1 DAT but rapidly recovered 2 DAT [7,16].…”

Section: Discussionmentioning

confidence: 98%

Comparison of Hyperspectral Imagery and Physiological Characteristics of Bentazone-Tolerant and -Susceptible Soybean Cultivars

Ali

Choi

et al. 2022

Agronomy

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Bentazone is a broadleaf post-emergence herbicide widely used for crop production that inhibits photosynthetic activity, resulting in phytotoxicity and injury in plants. Evaluating and identifying herbicide-tolerant genotypes is a critical step in plant breeding programs. In this study, we determined the reaction of 138 Korean soybean cultivars to bentazone using visual evaluation, and selected cultivars were further evaluated to determine the effects of bentazone on physiological parameters. For physiological parameters, we measured the normalized difference vegetation index (NDVI) from hyperspectral reflectance images. From 2 to 4 DAT, the NDVI for two sensitive cultivars was between 0.60 and 0.69, while the NDVI for tolerant cultivars was between 0.70 and 0.86. Photosynthesis rate (A), transpiration (E), stomatal conductance (gsw), and total conductance of CO2 (gtc) were measured using chlorophyll fluorescence. Visual score evaluation showed that moderate bentazone-tolerant cultivars were predominant among the Korean cultivars. For physiological measurements, differences in NDVI were detected between bentazone-tolerant and -sensitive cultivars 2 days after treatment (DAT). However, the A, E, gsw, and gtc levels dramatically decreased 1 DAT in the sensitive cultivars. This study provides insights into the tolerance and sensitivity of soybeans to bentazone.

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Section: Discussionmentioning

confidence: 98%

Comparison of Hyperspectral Imagery and Physiological Characteristics of Bentazone-Tolerant and -Susceptible Soybean Cultivars

Ali

Choi

et al. 2022

Agronomy

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“…Evaluation of photosynthetic parameters in herbicide-resistant plants makes it possible to verify the changes that occur in photosynthetic metabolism, one of which is stomatal conductance [6]. Stomatal conductance was further understood as a physiological mechanism to control transpiration, which plays a role in water absorption, nutrition and leaf temperature regulation [26].…”

Section: Physiological Activity Test On Resistant Weedsmentioning

confidence: 99%

“…The herbicide application causes differences in physiological activity that occurs between resistant and sensitive weeds [6]. The plant metabolism process was correlated with gas exchange that occurs.…”

Section: Introductionmentioning

confidence: 99%

Resistance status and physiological responses of Dactyloctenium aegyptium to diuron herbicide in pineapple plantation

SARI¹,

Sriyani

Yusnita

et al. 2022

J. Nat.

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Diuron herbicide has been used in the pineapple plantation in Lampung, Indonesia, for more than 35 years. It has been realized that the use of herbicides with the same mode of action intensively can speed up the evolution of resistant weeds over a long period of time. This study aimed to determine whether Dactyloctenium aegyptium from pineapple plantation has evolved resistance to diuron and to examine whether the resistance correlates with the weed physiological activities. The study was conducted at the University of Lampung, from September 2018 to March 2019. The study consisted of two stages, i.e. Stage 1: Weed resistance test and Stage 2: Physiological activity test on resistant weed. The study used a split-plot design. The main plot was the origins of weeds (exposed and unexposed to diuron) and thhe supplots was the diuron dose. The result showed that D. aegyptium exposed has high-level resistance to diuron. The physiological activities of D. aegyptium which has a high level of diuron resistance exhibited higher carbon assimilation, stomatal conductance, and transpiration rates than the sensitive D. aegyptium.

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“…The method of graphical analysis of relative productivity (RP) (Radosevich et al 2007;Cousens 1991) was used for analyzing data on HEI, LA and SDW, as described by Ruchel et al (2019) and Silva et al (2017). The criterion to consider the existence of differences in competitive ability, regarding indexes of relative competitiveness (RC), coefficient of relative clustering (K) and coefficient of competitiveness (C), calculated in the 50:50 proportion, was that the T-test should show differences in at least two of them (Bianchi et al 2006).…”

Section: Glycine Max Amaranthus Viridi Competitivitymentioning

confidence: 99%

Effect of high temperature and recovery from stress on crop–weed interaction

et al. 2020

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Biotic and abiotic stresses, either individually or in combination, may affect soybean growth and development negatively, besides competitiveness with weeds. This study aimed at evaluating the effect of heat stress and plant recovery on crop-weed interaction by analyzing growth variables. Experiments were set up as replacement series of soybean with slender amaranth. Treatments followed a factorial scheme, which was composed of heat stress [high temperature (38/22 ± 2 °C) against the control (28/22 ± 2 ºC)] and of proportions of soybean and slender amaranth, i.e., 100:0 (pure stand of soybean), 50:50 and 0:100 (pure stand of slender amaranth). After being submitted to high temperatures, plants were analyzed in terms of their recovery from heat stress. Variables under evaluation were height, leaf area and shoot dry weight. Results led to the conclusion that the weed shows more competitiveness than soybean, regardless of the heat stress. Interspecific competition for soybean and intraspecific competition for slender amaranth influence their height, leaf area and shoot dry weight negatively, while high temperature affects slender amaranth positively.

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Photosynthetic Performance of Glyphosate Resistant and Glyphosate Susceptible Hairy Fleabane under Light Intensity

Cited by 5 publications

References 22 publications

Comparison of Hyperspectral Imagery and Physiological Characteristics of Bentazone-Tolerant and -Susceptible Soybean Cultivars

Comparison of Hyperspectral Imagery and Physiological Characteristics of Bentazone-Tolerant and -Susceptible Soybean Cultivars

Resistance status and physiological responses of Dactyloctenium aegyptium to diuron herbicide in pineapple plantation

Effect of high temperature and recovery from stress on crop–weed interaction

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