Searching for biomarkers of early detection of 2,4-D effects in a native tree species from the Brazilian Cerrado biome

Silva, Fábia Barbosa; Costa, Ana Letícia Rodrigues; Müller, Caroline; Almeida, Gabriel Martins; Nascimento, Kelly Juliane Telles; Batista, Priscila Ferreira; Vital, Roberto Gomes; Silva, Danilo Guimarães; Megguer, Clarice Aparecida; Jakelaitis, Adriano; Domingos, Marisa

doi:10.1080/03601234.2022.2028528

Cited by 4 publications

(1 citation statement)

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“…Malformation of chlorophyll cells can reduce the concentration of chlorophylls a and b, directly affecting the photosynthetic efficiency of a plant [35,36]. Chlorophyll levels are variables related to the inhibition of photosystems I and II by the action of herbicides [37].…”

Section: Discussionmentioning

confidence: 99%

Development of Commercial Eucalyptus Clone in Soil with Indaziflam Herbicide Residues

Maciel¹,

Duque²,

Carvalho³

et al. 2023

Preprint

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The pre-emergent herbicide indaziflam is efficient in the management of weeds in eucalyptus crops, but this plant may develop less in soil contaminated with it. The objective was to evaluate the levels of chlorophylls a and b, the apparent electron transport rate (ETR), growth and dry matter of leaves, stems and roots of Clone I144, in clayey soil, contaminated with the herbicide indaziflam and the leaching potential of this herbicide. The design was completely randomized in a 3 x 5 factorial scheme, with four replications. Chlorophyll a and b contents, apparent electron transport rate (ETR), height growth and dry matter of leaves, stems and roots of Clone I144 were evaluated. The leaching of indaziflam in the clayey soil profile (69% clay) was evaluated in a bioassay with Sorghum bicolor, a plant with high sensitivity to this herbicide. The visual intoxication and height of this plant were evaluated at 28 days after sowing (DAS). Chlorophyll a and b contents and ETR, height and stem dry matter of Clone I144 were lower in soil contaminated with indaziflam residues. The dose of indaziflam, necessary to cause 50% (C50) of intoxication and the lowest height of sorghum plants, was 4.65 and 1.71 g ha-1 and 0.40 and 0.27 g ha-1 in clayey soil and sand, respectively. The sorption ratio (SR) of this herbicide was 10.65 in clayey soil. The herbicide indaziflam leached up to 30 cm depth at doses of 37.5 and 75 g ha-1 and its residue in the soil reduced the levels of chlorophylls a and b, the apparent electron transport rate (ETR) and the growth of Clone I144.

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Section: Discussionmentioning

confidence: 99%