Allelopathic effect of Passiflora alata Curtis extracts on seed germination

Freitas, Allan Rocha de; Lopes, José Carlos; Mengarda, Liana Hilda Golin; Zanotti, Rafael Fonsêca; Venâncio, Luan Peroni

doi:10.14295/cs.v7i1.842

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…Seeds subjected to concentrations of 100 % and 50 % aqueous extract did not show average germination or vigor (Table 3). Treatments with concentrations of the aqueous extract of P. mucronata fruit peel (Tables 1, 2, and 3) inhibited root and aerial part growth of L. sativa, which corroborated the findings of Freitas et al (2016), who tested the extract of P. alata in lettuce seeds and found a reduction in root and APL. The germination percentage and GVI of L. sativa seeds (Table 4), did not differ significantly from each other when compared to the positive and negative controls of the genotypes G1, G6, and G9; however, they did differ from those of the other treatments.…”

Section: Germination and Vigor Of L Sativa Submitted To Treatmentssupporting

confidence: 84%

April 2023

2023

Aust J Crop Sci

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Pesticide misuse has led to problems in agriculture, contamination of environment, and human health. However, research into alternative methods of controlling invasive plants is expanding. The allelopathic effect of secondary metabolites from plant parts suggests a potential and sustainable alternative to plant residues for use as bioherbicides. Given the above, the current study aimed to investigate the allelopathic potential of various concentrations of the aqueous extract of fruit peels of genotypes of Passiflora mucronata in seed germination and seedling growth of Lactuca sativa L. Fruit peels of genotypes of P. mucronata were used to obtain an aqueous extract, which was then filtered and diluted at the following concentrations: T1=100; T2=50; T3=25; T4=12.5 mg mL -1 ; T5= negative control (distilled water) and T6= positive control (glyphosate). Germination was carried out in Petri plates and was conditioned in a biochemical oxygen demand germination chamber at 25 ± 2 °C. Macroscopic evaluation was performed at the germination stage and root and aboveground growth of the seedlings, and the germination velocity index were also evaluated. Cytogenetic analysis was performed, and mitotic index was obtained. The design was entirely randomized, with five repetitions of 25 seeds each. Allelopathic substances found in the bark of P. mucronata fruits interfere with seed germination and vigor, as well as initial seedling growth. The germination of L. sativa seeds was 100% inhibited by extract concentrations of 50 % and 100 %. The cell cycle of L. sativa seeds is inhibited by allelopathic substances present in the bark of P. mucronata fruits. It is concluded that aqueous extracts of Passiflora mucronata have an allelopathic inhibitory effect on germination and initial growth of L. sativa.

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Section: Germination and Vigor Of L Sativa Submitted To Treatmentssupporting

confidence: 84%

April 2023

2023

Aust J Crop Sci

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“…The gelatinous aril present in the testa of the seeds can disrupt germination through two different mechanisms. On the one hand, hydrophobic molecules present in the aryl, such as unsaturated triglycerides, can act as a barrier or create very negative water potential conditions, preventing seed imbibition; on the other hand, steroids present in the aril, such as brassins, can function as hormones, competing for the active binding sites or even inhibiting the action of germination promoting hormones present in the seed (Freitas et al, 2016;Martins et al, 2010;Silva et al, 2015). As found in seeds of other species of the genus Passiflora, both tegumentary semipermeability and the presence of aril residues had a negative effect on germination (Rodríguez et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Effect of pre-germination treatments on seed germination of Passiflora setacea DC (Passifloraceae)

Salomão¹,

José²,

Santos³

2023

Rev. DELOS

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setacea seeds without aril, were submitted to pre-germination treatments: T1(control); T2 (pre-soaking in Promalin® solution [gibberellin (GA4+7) + N-(phenylmethyl)-1H-purine 6-amine (6-benzyladenine) both at a concentration of 18.8 g.L-1] in bainMarie, 45 °C/20 min.; T3 (osmopriming with KNO3 at a concentration of 2.6g.L-1 H2O, 25 °C/1 day, with aeration); T4 (osmopriming with KNO3 at a concentration of 2.6g.L- 1 H2O, 25 °C/2 days, with aeration); T5 (T3 followed by T2) and T6 (T4 followed by T2). The initial moisture contents, ranging from 6.7% to 8% did not differ from each other (α 0.05). The highest fresh mass increment at 168h and the highest moisture content at the end of the germination test were achieved by T2, 40.9% and 44.3%, respectively. The lowest fresh mass increment at 168h was T1 (13.1%). Osmopriming with KNO3 and aeration contributed to better water absorption in T3 and T4 than in T1, but did not stimulate the germination performance of the seeds. The highest germination percentages and germination speed indexes were obtained from T2 seeds (92% and 8, 4595), T5 (96% and 11.7438) and T6 (94% and 11.6728) as well as the lowest mean germination times T2 (11.73 days), T5 (9.49 days) and T6 (8 .81 days), which did not differ statistically from each other (α 0.05). However, the germination process took less time for T2 seeds, 21 days. The combination of aryl removal and phytohormone solution in a bain-marie at 45 °C/20min. with or without osmopriming with KNO3 stimulated the germination process of P. setacea seeds.

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“…The seminiferous propagation is the main method for spreading passion fruit species. However, the germination of sweet passion fruit seeds is low and uneven [7,8,9], which may be associated with integument impermeability, physiological immaturity, embryo immaturity, and the presence of inhibitory substances [10]. For the Passifloraceae family, dormancy is an important factor in the study of seeds, mainly because they present embryo, endosperm, integument, and aryl in their constitution, and some of these structures, such as aryl and integument, can influence seed dormancy.…”

Section: Introductionmentioning

confidence: 99%

Performance of sweet passion fruit seeds submitted to pre-germination treatments

et al. 2020

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Brazil is the world's largest consumer and producer of passion fruit (Passiflora spp.). Its fruit is widely accepted by consumers mainly in terms of natura consumption, juices, and medicines. However, these plants are spread mainly via seminiferous propagation, in which low and uneven seed germination is verified. The objective of this work was to study seed performance and initial growth of Passiflora alata Curtis seedlings as a function of pre-germination treatments. Seeds of P. alata extracted from mature fruits harvested were used and manually extracted from the fruits, and the aryl was removed by rubbing in a stainless steel mesh sieve with quicklime, followed by drying in the shade on filter paper for 24 hours. The seeds were submitted to physical scarification and immersed in distilled water for 0; 24; 48; 72; 96; and 120 hours of stirring. The seed scarification method by cracking interferes negatively in the germination and initial growth of P. alata seedlings. Intact seeds had a higher percentage of germination as the stirring time of the seeds imbibed in water increased. The cracked seed treatment provided the highest averages when electrical conductivity was evaluated in the stirring time of 120 hours. Intact seeds immersed in distilled water with stirring for 120 hours provide greater germination and initial growth of P. alata Curtis seedlings.

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Allelopathic effect of Passiflora alata Curtis extracts on seed germination

Cited by 4 publications

References 8 publications

April 2023

April 2023

Effect of pre-germination treatments on seed germination of Passiflora setacea DC (Passifloraceae)

Performance of sweet passion fruit seeds submitted to pre-germination treatments

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