Effect of imazapic residues on photosynthetic traits and chlorophyll fluorescence of maize seedlings

Su, Wangcang; Sun, Lanlan; Wu, Renhai; H., Y.; Wang, H. L.; Xu, Hongle; Yan, Ze; Lu, Chuantao

doi:10.1007/s10535-016-0641-3

Cited by 5 publications

(6 citation statements)

References 21 publications

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“…This suggest that one of the keys to high grain yield is increasing photosynthetic rate and extending peak-hours of photosynthesis ( Tollenaar and Lee, 2002 ). F v / F m and Φ PSII are indicators to evaluate the performance of photosynthesis ( Genty et al, 1989 ; Wagle et al, 2016 ; Su et al, 2017 ). In this study, F v / F m of N2 increased by 4–13%, 3–7%, and 4%, and Φ PSII of N2 increased by 7–21%, 10–15%, and 5–7% compared to N0, N1 and N3, respectively.…”

Section: Discussionmentioning

confidence: 99%

Photosynthetic Characteristics and Chloroplast Ultrastructure of Summer Maize Response to Different Nitrogen Supplies

Liu

Gao

et al. 2018

Front. Plant Sci.

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Maize (Zea mays L.) is the important crop over the world. Nitrogen (N) as necessary element affects photosynthetic characteristics and grain yield of summer maize. In this study, N0 (0 kg N ha-1), N1 (129 kg N ha-1), N2 (185 kg N ha-1), and N3 (300 kg N ha-1) was conducted using hybrid ‘ZhengDan958’ at Dawenkou research field (36°11′N, 117°06′E, 178 m altitude) in the North China Plain to explore the effects of N rate on photosynthetic characteristics and chloroplast ultrastructure. Gas exchange parameters, chlorophyll fluorescence parameters, leaf area index (LAI), chlorophyll SPAD value, chloroplast ultrastructure, dry matter weight and grain yield were measured. At physiological maturity stage, dry matter weight and grain yield of N2 increased by 33–52% (P ≤ 0.05) and 6–32% (P ≤ 0.05), respectively, compared with other treatments. During the growing from silking (R1) to milk (R3) stage, LAI of N0 and N1 were 35–38% (P ≤ 0.05) and 9–23% (P ≤ 0.05) less than that of N2, respectively. Chlorophyll SPAD value of N0 and N1 were 13–22% (P ≤ 0.05) and 5–11% (P ≤ 0.05) lower than that of N2. There was no significant difference in LAI and chlorophyll SPAD value between N2 and N3 during the period from R1 to R3 (P > 0.05). The net photosynthetic rate (Pn), maximal quantum efficiency of PSII (Fv/Fm) and quantum efficiency of PSII (ΦPSII) were higher with the increase of N rate up to N2 (P ≤ 0.05), and those of N3 were significantly less than N2 (P ≤ 0.05). In compared with N2, the chloroplast configuration of N0 and N1 became elliptical, almost circular or irregular. The membrane of chloroplast and thylakoid resolved with growing stage, and the number of chloroplast per cell and lamellae per grana decreased under N0 and N1 treatment (P ≤ 0.05). Under N0 and N1 treatments, summer maize had more negative photosynthetic characteristics. The more number of osmium granule and vesicle and the larger gap between lamellae were shown in N3. Therefore, N2 treatment, 185 kg N ha-1, is the appropriate application rate for grain yield, photosynthesis and chloroplast ultrastructure.

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Section: Discussionmentioning

confidence: 99%

Photosynthetic Characteristics and Chloroplast Ultrastructure of Summer Maize Response to Different Nitrogen Supplies

Liu

Gao

et al. 2018

Front. Plant Sci.

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“…Preemergent herbicides are an important tool for control, because they can limit germination, growth, and seed production of targeted exotic annuals, thereby reducing resident seedbanks (Brisbin et al 2012;Hirsch et al 2012) and releasing growth of desirable perennials (Madsen et al 2014;Sbatella et al 2011;Sheley et al 2001). However, herbicides also have the potential for negative effects on non-target species (Sheley et al 2007;Su et al 2017;Wallace and Prather 2016). Several herbicides used to control exotic annual grasses in the semiarid Great Basin include flufenacet plus metribuzin, propoxycarbazone-sodium, sulfosulfuron, rimsulfuron, and imazapic (Wallace and Prather 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Imazapic is a broad-spectrum herbicide, though fairly selective when applied at low rates (≤70 g ai ha − 1 ; Bahm and Barnes 2011). Imazapic may act either as a preemergent germination inhibitor (Shinn and Thill 2004) or as a postemergent herbicide, inhibiting the enzyme acetolactate synthase (Su et al 2017). Despite imazapic's widespread use, its effectiveness at controlling exotic annual grasses is highly variable (Morris et al 2009;Wallace and Prather 2016), and more information is needed about outcomes in different management situations.…”

Section: Introductionmentioning

confidence: 99%

Vegetative Community Response to Landscape-Scale Post-fire Herbicide (Imazapic) Application

Applestein

Germino

Fisk

2018

Invasive plant sci. manag.

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Disturbances such as wildfire create time-sensitive windows of opportunity for invasive plant treatment, and the timing of herbicide application relative to the time course of plant community development following fire can strongly influence herbicide effectiveness. We evaluated the effect of herbicide (imazapic) applied in the first winter or second fall after the 113,000 ha Soda wildfire on the target exotic annual grasses and also key non-target components of the plant community. We measured responses of exotic and native species cover, species diversity, and occurrence frequency of shrubs and forbs seeded before (1 to 2 or 9 to 10 mo) herbicide application. Additionally, we asked whether landscape factors, including topography, species richness, and/or soil characteristics, influenced the effectiveness of imazapic. Cover of exotic annual grass cover, but not of deep-rooted perennial bunchgrass, was less where imazapic had been applied, whereas more variability was evident in the response of Sandberg bluegrass (Poa secunda J. Presl) and seeded shrubs and forbs. Regression-tree analysis of the subset of plots measured both before and after the second fall application revealed greater reductions of exotic annual grass cover in places where their cover was <42% before spraying. Otherwise, imazapic effects did not vary with the landscape factors we analyzed.

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“…The observations reported from maize seedlings support our results where higher doses of the herbicide Imazapic lowered chlorophyll contents and caused a reduction in net photosynthetic rate. 38 In addition, the results of the chlorophyll fluorescence evaluation in radish indicated that plants treated with herbicide glyphosate had lower Yield-II values compared to the untreated control. Glyphosate treatment resulted in substantial decrease in the Fv/Fm ratio, clearly an adverse effect of higher concentrations.…”

Section: Resultsmentioning

confidence: 99%

Effective Control against Broadleaf Weed Species Provided by Biodegradable PBAT/PLA Mulch Film Embedded with the Herbicide 2-Methyl-4-Chlorophenoxyacetic Acid (MCPA)

Khan

Kaur

Baldwin

et al. 2020

ACS Sustainable Chem. Eng.

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Biodegradable mulches are considered a promising alternative to polyethylene-based, nonbiodegradable mulch for sustainable agriculture. In the present study, a bioactive 2-methyl-4- cholorophenoxyacetic acid/poly(3-hydroxybutyrate- co -3-hydroxyvalerate) (MCPA-PHBV) conjugate blended with biodegradable poly(butylene adipate- co -terephthalate/polylactide (PBAT/PLA) was developed and used as mulch under controlled condition greenhouse pot experiment with fava bean ( Vicia faba ) as the nontarget crop species. The objectives were to examine the effectiveness of sustained-release of MCPA herbicide from biodegradable mulch for broadleaf weed suppression and to assess any adverse effects of the herbicide on the nontarget species (fava bean). The energy-dispersive X-ray spectroscopy analysis (EDS) suggests that a substantial quantity of the herbicide was released from the biodegradable mulch which effectively killed the broadleaf weed species even at 1% MCPA concentration. However, the higher concentrations of the herbicide adversely affected several physiological parameters of fava bean growth and development. Stomatal conductance decreased, while leaf temperature subsequently rose (at MCPA concentrations 5, 7.5, and 10%). The quantum yield of the Photosystem II (PSII) indicates that the photosynthetic efficiency was also restricted at concentrations 7.5% and 10%. Evidently, this slow-release herbicide system worked efficiently for broadleaf weed control but at higher concentrations, resulted in adverse physiological effects on the nontarget crop species. This study has demonstrated that biodegradable mulches containing MCPA herbicide are able to effectively inhibit the growth of broad leaf weed species and may be of potential importance in a wide variety of horticultural and agricultural applications.

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Effect of imazapic residues on photosynthetic traits and chlorophyll fluorescence of maize seedlings

Cited by 5 publications

References 21 publications

Photosynthetic Characteristics and Chloroplast Ultrastructure of Summer Maize Response to Different Nitrogen Supplies

Photosynthetic Characteristics and Chloroplast Ultrastructure of Summer Maize Response to Different Nitrogen Supplies

Vegetative Community Response to Landscape-Scale Post-fire Herbicide (Imazapic) Application

Effective Control against Broadleaf Weed Species Provided by Biodegradable PBAT/PLA Mulch Film Embedded with the Herbicide 2-Methyl-4-Chlorophenoxyacetic Acid (MCPA)

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