Metazachlor effect on poplar – Pioneer plant species for riparian buffers

Maršík, Petr; Zunová, T.; Vaněk, Tomáš; Podlipná, Radka

doi:10.1016/j.chemosphere.2021.129711

Cited by 9 publications

(6 citation statements)

References 23 publications

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“…In our results, both male and female P. cathayana mainly enriched U in their roots, which is consistent with previous studies that showed that roots were the primary part of plants such as Amaranthus [33], sunflowers [34], and poplar trees [20,35] to accumulate heavy metals, including U. In further comparison with female trees, the male P. cathayana exhibited significantly higher U accumulation ability in roots without U detected in U can inhibit the growth of poplar [29], including plant height and biomass.…”

Section: Sex Differences In Growth U Enrichment and Distributionsupporting

confidence: 93%

Sex-Specific Physiological Responses of Populus cathayana to Uranium Stress

Xia

Cheng

Zheng

et al. 2022

Forests

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Attention is increasingly being paid to the contamination of soil by the radioactive element uranium (U). Phytoremediation of contaminated soil by economically advantageous and environment-protective plants shows considerable potential for addressing this problem. Populus cathayana is a species with high heavy-metal tolerance, economic value, and notable potential for phytoremediation. Plant-sex-related differences can lead to differences in vegetative growth and tolerance to various stressors. As such, in this study, we designed a pot experiment to analyze the responses of male and female trees of P. cathayana to 50 mg kg−1 U stress in contaminated soil for 3 months. We studied the U uptake and distribution, photosynthesis, chlorophyll fluorescence, active oxygen species, and antioxidant enzymes of P. cathayana. The results showed that the photosynthetic activity and chlorophyll fluorescence of male and female trees were similar, and U stress mainly affected the nonstomatal factors and photosystem II during photosynthesis. Regarding the physiological and biochemical processes, male and female trees showed different defense strategies: male trees had higher peroxidase (POD), H2O2, and soluble sugars, but lower malondialdehyde (MDA), superoxide dismutase (SOD), and soluble proteins. Under U stress, the active oxygen produced by male trees could be cleared by antioxidant enzymes, preventing damage to the cell membrane. Male trees accumulated a higher U concentration in their roots than female trees, whereas the transportation of U from roots to leaves in male trees was lower than that in female trees. Therefore, our results suggested that male trees have a higher tolerance capacity and greater ability to remediate U-polluted soil than female trees. Future phytoremediation studies should consider the differences between plant sexes in the tolerance to U-contaminated land.

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Section: Sex Differences In Growth U Enrichment and Distributionsupporting

confidence: 93%

Sex-Specific Physiological Responses of Populus cathayana to Uranium Stress

Xia

Cheng

Zheng

et al. 2022

Forests

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“…Thus, the growth of organs in the plants, such as radicle and hypocotyle is inhibited, impeding seed coat protrusion and consequently seed germination. In addition, MZ can cause a reduction in seed germination indirectly by inducing an oxidative stress in the plants, which is related with a decrease of plant growth (Maršík et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Seed germination of common and endangered arable weed species is differently affected by the herbicide metazachlor and its transformation products

et al. 2023

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High inputs of herbicides have caused the decline of arable weed species, which formerly evolved under less intensively managed crop lands. Arable weed species have adapted their germination strategies to respond to unfavourable periods. However, species considered endangered have more specific germination requirements. The herbicide metazachlor (MZ), in its formulated form Butisan®, is used for the control of annual and dicotyledonous weeds and degrades in the soil into two major transformation products (TPs): metazachlor oxalic acid (MZ‐OA) and metazachlor ethane sulphonic acid (MZ‐ESA). These TPs are often found in higher concentrations compared to MZ. We tested the effect of MZ and its TP on seed germination of four common and three endangered arable weed species present in Central Europe by setting up multi‐factorial climate chamber experimental designs. We chose concentrations imitating field conditions and according to previously reported fraction occurrences in the topsoil. We assessed germination by measuring germination percentage, mean germination time and synchrony of germination. All germination variables were affected with increasing concentrations of MZ. Both, common and endangered species showed a decrease in germination percentage under the highest concentration of MZ. MZ and MZ‐OA increased the synchronicity of endangered species, while both TPs decreased mean germination time of endangered species. Common species showed less significant differences when compared to the control and also had a less synchronised and longer germination time compared to endangered species. The observed response of common species to both MZ and TPs may be convenient in the face of short term unfavourable environmental conditions, such as those found in intensively managed arable lands. Our results highlight that the species‐specific response of arable weeds to herbicides will further increase the dominance of common over rare arable weed species.

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“…Cell cultures were obtained and cultivated as described previously [ 24 ]. Briefly, callus culture was obtained from hypocotyls of plants mentioned above by transplanting cuttings onto solid MS medium supplemented with the phytohormones 2,4-dichlorophenoxyacetic acid (0.225 mg L −1 ) and kinetin (0.215 mg L −1 ).…”

Section: Methodsmentioning

confidence: 99%

The Impact of Pesticide Use on Tree Health in Riparian Buffer Zone

Hanková

Maršík

Zunová

et al. 2023

Toxics

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The result of the enormous usage of pesticides in agriculture is the contamination of soil and water bodies surrounding the fields. Therefore, creating buffer zones to prevent water contamination is very useful. Chlorpyrifos (CPS) is the active substance of a number of insecticides widely used all over the world. In our study, we focused on the effect of CPS on plants forming riparian buffer zones: poplar (Populus nigra L., TPE18), hybrid aspen (P.tremula L. × P. tremuloides Michx.), and alder (Alnus glutinosa L.). Foliage spray and root irrigation experiments were conducted under laboratory conditions on in vitro cultivated plants. Spray applications of pure CPS were compared with its commercially available form—Oleoekol®. Although CPS is considered a nonsystemic insecticide, our results indicate that CPS is transferred not only upwards from roots to shoots but also downwards from leaves to roots. The amount of CPS in the roots was higher (4.9 times and 5.7 times, respectively) in aspen or poplar sprayed with Oleoekol than in those sprayed with pure CPS. Although the treated plants were not affected in growth parameters, they showed increased activity of antioxidant enzymes (approximately two times in the case of superoxide dismutase and ascorbate peroxidase) and augmented levels of phenolic substances (control plants −114.67 mg GAE/g dry tissue, plants treated with CPS—194.27 mg GAE/g dry tissue). In summary, chlorpyrifos, especially as a foliar spray pesticide, can create persistent residues and affects not only target plants but also plants surrounding the field.

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Metazachlor effect on poplar – Pioneer plant species for riparian buffers

Cited by 9 publications

References 23 publications

Sex-Specific Physiological Responses of Populus cathayana to Uranium Stress

Sex-Specific Physiological Responses of Populus cathayana to Uranium Stress

Seed germination of common and endangered arable weed species is differently affected by the herbicide metazachlor and its transformation products

The Impact of Pesticide Use on Tree Health in Riparian Buffer Zone

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