Arbuscular mycorrhizas increase survival, precocity and flowering of herbaceous and shrubby species of early stages of tropical succession in pot cultivation

Rondina, Artur Berbel Lirio; Lescano, Luis Eduardo Azevedo Marques; Alves, Ricardo de Almeida; Matsuura, Enio Massao; Nogueira, Marco Antônio; Zangaro, Waldemar

doi:10.1017/s0266467414000509

Cited by 13 publications

(7 citation statements)

References 51 publications

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“…Seeds were purchased from Isla Sementes (Porto Alegre, Brazil). Germination was performed in plastic pots (10.5 cm high, 9.5 cm lower diameter, 14 cm upper diameter) filled with a clay soil (a Rhodic Ferralsol) collected from an herbicide-free experimental area at the campus of the State University of Londrina, Brazil (for a detailed characterization of the soil, see [ 24 ]). One week after sowing, four individuals were retained in each pot and the substrate was supplemented with 50 mL of complete nutrient solution [ 25 ].…”

Section: Methodsmentioning

confidence: 99%

Nanoencapsulation Enhances the Post-Emergence Herbicidal Activity of Atrazine against Mustard Plants

et al. 2015

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Poly(epsilon-caprolactone) (PCL) nanocapsules have been recently developed as a modified release system for atrazine, an herbicide that can have harmful effects in the environment. Here, the post-emergence herbicidal activity of PCL nanocapsules containing atrazine was evaluated using mustard (Brassica juncea) as target plant species model. Characterization of atrazine-loaded PCL nanocapsules by nanoparticle tracking analysis indicated a concentration of 7.5 x 1012 particles mL-1 and an average size distribution of 240.7 nm. The treatment of mustard plants with nanocapsules carrying atrazine at 1 mg mL-1 resulted in a decrease of net photosynthesis and PSII maximum quantum yield, and an increase of leaf lipid peroxidation, leading to shoot growth inhibition and the development of severe symptoms. Time course analysis until 72 h after treatments showed that nanoencapsulation of atrazine enhanced the herbicidal activity in comparison with a commercial atrazine formulation. In contrast to the commercial formulation, ten-fold dilution of the atrazine-containing nanocapsules did not compromise the herbicidal activity. No effects were observed when plants were treated with nanocapsules without herbicide compared to control leaves sprayed with water. Overall, these results demonstrated that atrazine-containing PCL nanocapsules provide very effective post-emergence herbicidal activity. More importantly, the use of nanoencapsulated atrazine enables the application of lower dosages of the herbicide, without any loss of efficiency, which could provide environmental benefits.

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Section: Methodsmentioning

confidence: 99%

Nanoencapsulation Enhances the Post-Emergence Herbicidal Activity of Atrazine against Mustard Plants

et al. 2015

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“…The dense network produced by root systems of the exotic restricted seedling emergence of the heliophilous herbaceous and early-successional woody species because this plant species typically has small seeds that produce small and fragile seedlings (Rondina et al . 2014, Zangaro et al . 2003, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…The soil was collected at 0-10 cm depth, sieved (2-mm mesh) and transferred to plastic pots with 3500 cm 3 capacity. Soil samples were airdried at room temperature and subjected to chemical analysis, as described in Rondina et al (2014). First, one third of the pots were sown with seeds of the exotic grass U. brizantha as a competitor, another third of the pots were sown with seeds of the forb L. nepetifolia as a competitor, and the remaining third of the pots were left without a competitor, as control.…”

Section: Soil Sampling Preparation and Analysismentioning

confidence: 99%

“…The fine-root system of the forb L. nepetifolia did not influence the seedling emergence of most plant species, whereas the exotic grass U. brizantha had a negative influence on the emergence of seedlings of the heliophilous herbaceous and early-successional woody species, but did not affect seedling emergence of latesuccessional ones. The dense network produced by root systems of the exotic restricted seedling emergence of the heliophilous herbaceous and early-successional woody species because this plant species typically has small seeds that produce small and fragile seedlings (Rondina et al 2014, Zangaro et al 2003, 2015. In contrast, seeds of late-successional woody species are usually larger and produce larger and more robust seedlings, which had their emergence less affected by the network of the competitor root system.…”

Section: Seedling Emergence and Mineral-n In Soilmentioning

confidence: 99%

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Differences between root traits of early- and late-successional trees influence below-ground competition and seedling establishment

et al. 2016

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Abstract:The competitive influence of the root system of the exotic grass Urochloa brizantha and the widespread forb Leonotis nepetifolia on the emergence, survival and early growth of the seedlings of eight tropical heliophilous herbaceous species, six early-successional woody species and five late-successional woody species from Brazil, grown in 3500-cm3 pots and in greenhouse without light restriction were assessed. The density of fine-root systems produced by the forb and the grass in pots were 6.8 cm cm−3 soil and 48.1 cm cm−3 soil, respectively. Seedlings survival of the heliophilous herbaceous, early- and late-successional woody species were 86%, 70% and 100% in presence of the forb root system and 12%, 14% and 100% in competition with grass root system, respectively. The competitive pressure applied by the grass root system on seedling growth of the heliophilous herbaceous, early- and late-successional woody species were 2.4, 1.9 and 1.4 times greater than the forb root system. Total root length of the heliophilous herbaceous, early- and late-successional woody species grown without competitors were 13, 33 and 5 times greater than in competition with forb, and were 66, 54 and 6 times greater than in competition with grass root system, respectively. The averages of fine-root diameter of plants grown without competitors were 209 μm for the heliophilous herbaceous, 281 μm for early-successional trees and 382 μm for late-successional trees. The root system of the forb did not avoid seedling establishment of most plant species, but the grass root system hampered more the establishment of heliophilous herbaceous and early-successional woody species than the seedling establishment of late-successional woody species. The different density of root systems produced in soil by the forb and the grass, and the distinct root traits (e.g. root diameter and root tissue density) of the early- and late-successional plant species can explain the differences in the establishment of seedlings of plant species belonging to different groups of tropical succession when exposed to below-ground competition.

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“…When evaluating the yield of Marandu grass subjected to increasing doses of phosphorus, Porto EMV et al [31] also observed increases in dry matter production with the increment of P doses, reaffirming the significance of this nutrient in forage yield in phosphorus-deficient soils under pasture conditions [32,33].…”

Section: Yield and Morphological Characteristics Of Marandu Grassmentioning

confidence: 96%

Combining Fully Acidulated Phosphates with Phosphate-Solubilizing Microorganisms for Urochloa brizantha Fertilization

Oliveira,

Peixoto,

Reis

et al. 2023

JEAI

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Aimed to evaluate the productive, morphological and nutritional characteristics, in addition to the accumulation of nutrients in the aerial part of Urochloa brizantha cv. Marandu subjected to phosphorus chemical sources and its interaction with phosphate-solubilizing inoculant. The experiment was developed in Colorado do Oeste, RO, Brazil, being adopted a randomized block design with three replications. The treatments consisted of different phosphate fertilizer doses associated or not with phosphate-solubilizing microorganisms (PSM): 0% P; 50% P; 100% P; 50% P + 250 mL ha-1 PSM; 50% P + 500 mL ha-1 PSM; 50% P + 750 mL ha-1 PSM; and 50% P + 1000 mL ha-1 PSM. Triple superphosphate was used as a chemical fertilizer, and fertilization with chemical fertilizer and PSM occurred on November 19th, 2021. The results for the morphological characteristics and yields of Marandu grass showed significant differences. The different arrangements and phosphate doses influenced the green matter yield and dry matter yield, both using the 50% P + 1000 mL ha-1 PSM presented higher yields (3,642.75 kg ha-1 and 1,049.10 kg ha-1, respectively). Higher crop growth rate results in green matter were also found when employing a combination of 50% P + 500 mL ha-1 PSM and 50% P + 1000 mL ha-1 PSM. Dry matter had a significant effect on the bromatological composition, with higher results observed when using 50% P alone (34.55%). Regarding the accumulation of nutrients in the aerial part, the highest P accumulation in Marandu grass was observed when utilizing 100% P, resulting in an accumulation of 15.4 kg P ha-1. Inoculation with PSM for fertilization of U. brizantha cv. Marandu grass does not have adverse effects on the increase in P availability to the plant, resulting in adequate yield and crop development associated with the productive potential of the area.

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Arbuscular mycorrhizas increase survival, precocity and flowering of herbaceous and shrubby species of early stages of tropical succession in pot cultivation

Cited by 13 publications

References 51 publications

Nanoencapsulation Enhances the Post-Emergence Herbicidal Activity of Atrazine against Mustard Plants

Nanoencapsulation Enhances the Post-Emergence Herbicidal Activity of Atrazine against Mustard Plants

Differences between root traits of early- and late-successional trees influence below-ground competition and seedling establishment

Combining Fully Acidulated Phosphates with Phosphate-Solubilizing Microorganisms for Urochloa brizantha Fertilization

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