scholarly journals Allelopathic potential of Gleichenella pectinata (Willd.) Ching on weed plant species

2012 ◽  
Vol 26 (4) ◽  
pp. 779-784 ◽  
Author(s):  
Valquiria Marin Voltarelli ◽  
Jose Pedro Nepomuceno Ribeiro ◽  
Maria Inês Salgueiro Lima
Keyword(s):  
Seed Germination ◽  
Plant Responses ◽  
Initial Growth ◽  
Global Effect ◽  
Weed Species ◽  
Phenological Stages ◽  
Allelopathic Potential ◽  
Almost All ◽  
Target Plant ◽  
Growth Of Seedlings

The goal of this paper was to determine the allelopathic potential of Gleichenella pectinata on three weed species (Echinochloa crus-galli (L.) Beauv (Poaceae), Ipomoea grandifolia (Dammer) O'Donell (Convolvulaceae) and Euphorbia heterophylla L. (Euphorbiaceae)). The experimental design was entirely randomized, with six replicates. The target plant responses were analyzed individually (percentage and average time of germination of the seeds and initial growth of seedlings) or combined, using the Global Effect Index. The extracts had a low effect on the percentage and average time of seed germination, but inhibited the seedling growth. The combined analysis revealed that almost all treatments caused inhibition. This analysis also showed the differences between the two phenological stages.

scholarly journals Germination and initial development of canola and radish submitted to castor leaves aqueous extracts

2016 ◽  
Vol 7 (1) ◽  
pp. 104
Author(s):  
Carlos Alberto Gonsiorkiewicz Rigon ◽  
Adriana Tourinho Salamoni ◽  
Luan Cutti ◽  
Adalin Cezar Morais de Aguiar
Keyword(s):  
Seed Germination ◽  
Castor Bean ◽  
Ricinus Communis ◽  
Initial Growth ◽  
Aqueous Extracts ◽  
Brassica Napus L ◽  
Initial Development ◽  
Allelopathic Potential ◽  
Ricinus Communis L ◽  
Radish Seed

This study aimed to evaluate the allelopathic activity of aqueous extracts of castor bean (Ricinus communis L.) leaves on germination and initial growth of canola (Brassica napus L.) and radish (Raphanus sativus L.) seedlings. Two experiments were conducted, usingcanola seeds for the first, which was installed in a 2x7 factorial scheme (with two photoperiods – dark and light and seven extracts concentrations - 0, 1, 2, 4, 8, 16 and 32%). The second experiment consisted of an evaluation of radish seed germination submitted to seven concentrations of the extracts in the dark photoperiod. The germination of the canola seeds was reduced in the dark, and the use of extracts at concentrations of 16% and 32%inhibited seeds germination for both studied photoperiods. The radish seed germination was completely inhibited when the concentration of 32% was used, however, at the concentrations of 4, 8 and 16% a reduction on rootand hypocoyl development of the seedlings were observed, affirming the high allelopathic potential of castor bean aqueous extracts on canola and radish.

Allelopathic Potential of Trifolium resupinatum and T. alexandrium on Seed Germination of Four Weed Species

2007 ◽  
Vol 10 (7) ◽  
pp. 1141-1143
Author(s):  
Fariba Maighany ◽  
Mahlagha Ghorbanli ◽  
Javad Khalghani ◽  
Morteza Najafpour
Keyword(s):  
Seed Germination ◽  
Weed Species ◽  
Allelopathic Potential ◽  
Trifolium Resupinatum

scholarly journals Allelopathic effect of essential oils of medicinal plants in Bidens pilosa L.

2014 ◽  
Vol 16 (3 suppl 1) ◽  
pp. 731-736 ◽  
Author(s):  
M.C.S. Alves ◽  
S. Medeiros Filho ◽  
A. Manoel Neto ◽  
R.C. Brito ◽  
R.C. Araujo
Keyword(s):  
Seed Germination ◽  
Root Growth ◽  
Essential Oils ◽  
Filter Paper ◽  
Allelopathic Effect ◽  
Bidens Pilosa ◽  
Indirect Contact ◽  
Allelopathic Potential ◽  
Randomized Design ◽  
Growth Of Seedlings

We determined the inhibitory allelopathic effects of the volatile extracts of Cinnamomum zeylanicum Ness, Lippia sidoides Cham. and Cymbopogum nardus L. on seed germination and root growth of seedlings of Bidens pilosa. The experiment was conducted at the Seed Analysis Laboratory of the Department of Plant Science, Federal University of Ceará. For this end, we used oils at the concentrations of 0.01, 0.02, 0.04 and 0.08% (v/v). Five treatments were used for each of the oils arranged in a completely randomized design with four replications of 25 seeds. The seeds were sown in Petri dishes lined with filter paper moistened with distilled water and, aiming at the indirect contact with each oil, two sheets of filter paper were placed on top of the lid, in which three (3) mL of each oil solution were added. Then, the dishes were incubated in a germination chamber at 25°C. The pH did not contribute to alter the results; the volatile extracts of essential oils of C. zeylanicum, L. sidoides and C. nardus inhibited seed germination and root growth of seedlings of B. pilosa, which shows allelopathic potential; and the concentration of 0.08% of oils caused the overall deterioration of the roots and death of seedlings of B. pilosa.

Chemical constituents and allelopathic activity of the essential oil from leaves of Eremanthus erythropappus

2018 ◽  
Vol 66 (8) ◽  
pp. 601 ◽  
Author(s):  
Ana Paula Resende Pinto ◽  
Janaína Brandão Seibert ◽  
Orlando David Henrique dos Santos ◽  
Sidney Augusto Vieira Filho ◽  
Andréa Mendes do Nascimento
Keyword(s):  
Seed Germination ◽  
Essential Oil ◽  
Chemical Constituents ◽  
Inhibitory Effect ◽  
Significant Inhibition ◽  
Weed Species ◽  
Bidens Pilosa ◽  
Allelopathic Potential ◽  
Allelopathic Activity ◽  
Radicle Length

The essential oil from leaves of Eremanthus erythropappus (DC.) MacLeish (Asteraceae) collected in South-eastern Brazil was extracted using a combination of water and steam distillation and investigated by chromatography/mass spectrometry (GC-MS). The sesquiterpene hydrocarbons were predominant (46.6%), followed by oxygenated sesquiterpenes (29.3%) and monoterpene hydrocarbons (18.8%). The major compounds were (β)-caryophyllene (29.3%), caryophyllene oxide (22.1%) and β-pinene (12.8%). The allelopathic activity of E. erythropappus essential oil on the seed germination and radicle length of seedlings was evaluated in lettuce (Lactuca sativa L.), tomato (Lycopersicum esculentum Mill.) and in two field weeds (field mustard – Brassica rapa L. and hairy beggarticks – Bidens pilosa L.). Among the weed species tested, the most significant inhibition of seed germination was observed in field mustard, as measured by the half–minimal inhibitory concentration, IC50 (IC50=26.5μL mL–1), and the most significant inhibitory effect on radicle length of seedlings was observed in seedlings of hairy beggarticks (IC50=16.3μL mL–1). In contrast, the lowest allelopathic effects of E. erythropappus essential oil on seed germination and radicle length of seedlings were observed in tomato (IC50=>200μL mL–1 and 130.1μL mL–1 respectively) and lettuce (IC50=97.1μL mL–1 and 35.1μL mL–1 respectively). These results revealed significant allelopathic potential of E. erythropappus essential oil against weeds, but minimal effect on lettuce and tomato germination, and thus suggests it is feasible to use E. erythropappus sustainability as an eco-friendly bioherbicide in cropping settings.

scholarly journals Allelopathic potential and chemical characterisation of ‘flor-de-papagaio’ bark (Norantea guianensis)

2021 ◽  
Vol 43 ◽  
pp. 53-63
Author(s):  
Ademir Kleber Morbeck de Oliveira ◽  
Rosemary Matias ◽  
Kelly Cristina Lacerda Pereira ◽  
Elvia Silvia Rizzi ◽  
Jéssica de Araújo Isaías Muller
Keyword(s):  
Phenolic Compounds ◽  
Seed Germination ◽  
Seedling Development ◽  
Initial Growth ◽  
Allelopathic Potential ◽  
Negative Interference ◽  
Tomato Seedlings ◽  
Tomato Seeds ◽  
Ethanolic Extracts

El objetivo fue llevar a cabo la prospección fitoquímica de la cáscara de Norantea guianensis y evaluar su potencial alelopático en la germinación de semillas y el crecimiento inicial de plántulas de lechuga y tomate, utilizando extractos acuosos y etanólicos. Se identificaron compuestos fenólicos y sus derivados, flavonoides y taninos, así como cumarinas, antraquinonas, alcaloides y saponinas. Se produjo interferencia negativa en la germinación y el vigor, especialmente en las semillas de tomate, y los extractos afectaron negativamente el desarrollo de las plántulas. La especie N. guianensis tiene la capacidad de interferir en el desarrollo de otras plantas y por esta razón, su uso debe evaluarse cuidadosamente. The purpose of thisstudy was to carry out phytochemical prospecting of Norantea guianensis bark and to evaluate its allelopathic potential in seed germination and the initial growth of lettuce and tomato seedlings using aqueous and ethanolic extracts. We identified phenolic compounds and derivatives, flavonoids, and tannins, as well as coumarins, anthraquinones, alkaloids, and saponins. Negative interference was observed in germination and vigour tests, mainly in tomato seeds, with extracts negatively affecting seedling development. The species N. guianensis has the ability to interfere in the development of other plants, and for this reason, its use should be carefully evaluated.

scholarly journals Allelopathic potential of croton bonplandianus bail

2021 ◽  
Vol 9 (1) ◽  
pp. 29-34
Author(s):  
H.S. Patil ◽  
Rajesh Sharma
Keyword(s):  
Seed Germination ◽  
Vigna Radiata ◽  
Mung Bean ◽  
Rhizosphere Soil ◽  
Pigeon Pea ◽  
Invasive Weeds ◽  
Weed Species ◽  
Invasive Weed ◽  
Allelopathic Potential

An extensive survey of floristic of native and invasive weed species was carried out during 2016 to 2019 in the semiarid agro ecosystem of Baramati Tahsil, Dist- Pune (M.S.). About 18 dominant invasive weeds such as Ageratum, Alternanthera, Croton., Xanthium, Parthenium and Tridax were encroaching the natives, becoming a serious threat to the major crops of this area such as wheat, sorghum, pearl millet, mung bean, pigeon pea, chillies and tomato. Amongst these Croton bonplandianus was highly dominant and wide spreading. Hence, its allelopathic potential was investigated. The allelopathic influence of leaf and root leachates as well as extracts of Croton bonplandianus Bail. was examined on seed germination of mung bean (Vigna radiata L.). The germination assay revealed that allelopathic potential and other factors are responsible for its dominance and successful invasion. The allelopathic influence of rhizosphere soil and its aqueous leachates indicated that both are responsible for inhibiting the seed germination and seedling growth of mungbean. Both the experiments have clearly confirmed the allelopathic potential of Croton bonplandianus. The HPTLC analyses confirmed the existence of a broad groups of allelochemicals like terpenoides, steroids, flavonoids, pungent and bitter essential oils and phenolics in its leaves and roots, which confirmed its allelopathic potential. Further characterization of above mentioned allelochemicals is in progress.

scholarly journals Allelopathic Potential of Jasminum Officinale on Weed Species

2017 ◽  
Vol 74 (1) ◽  
pp. 66
Author(s):  
Steliana RODINO ◽  
Marian BUTU ◽  
Alina BUTU
Keyword(s):  
Seed Germination ◽  
Beneficial Effect ◽  
Weed Control ◽  
Lolium Perenne ◽  
Ambrosia Artemisiifolia ◽  
Sorghum Halepense ◽  
Allelopathic Effect ◽  
Weed Species ◽  
Allelopathic Potential ◽  
Radicle Elongation

Allelopathy is generally defined as any direct or indirect harmful or beneficial effect of one plant on another mediated by the production allelochemicals. The scope of this study was the evaluation of the potential allelopathic effect of Jasminum officinale against some weed species.  The effects of extracts obtained from root, stem and leaves of J. officinale, were evaluated against ragweed (Ambrosia artemisiifolia), ryegrass (Lolium perenne), and Johnsonn grass (Sorghum halepense). The aqueous leachates of jasmine demonstrated promising allelopathic potential by inhibiting seed germination and radicle elongation of all tested species. The more profound research in the field of allelopathy will eventually lead to the development of bioproducts designed for pest or weed control using allelochemicals.

Allelopathic Potential of Wheat (Triticum aestivum) Straw on Selected Weed Species

Weed Science ◽  
1982 ◽  
Vol 30 (5) ◽  
pp. 495-497 ◽  
Author(s):  
James W. Steinsiek ◽  
Lawrence R. Oliver ◽  
Fred C. Collins
Keyword(s):  
Triticum Aestivum ◽  
Seed Germination ◽  
Seedling Growth ◽  
Weed Seed ◽  
Weed Species ◽  
Allelopathic Potential ◽  
Ipomoea Lacunosa ◽  
Sesbania Exaltata ◽  
Pitted Morningglory ◽  
Germination And Growth

The allelopathic potential of wheat [Triticum aestivum(L.) ‘Doublecrop′] straw residue was evaluated on weed-seed germination and seedling growth. The inhibition of weed-seed germination and seedling growth was extract-, species-, and temperature-dependent. The extracts prepared by agitating and soaking caused greater inhibition than those obtained by leaching. The descending order of species susceptibility was ivyleaf morningglory [Ipomoea hederacea(L.) Jacq.], velvetleaf (Abutilon theophrastiMedic.), pitted morningglory (Ipomoea lacunosaL.), hemp sesbania [Sesbania exaltata(Raf.) Cory], sicklepod (Cassia obtusifoliaL.), and Japanese barnyard millet [Echinochloa crus-gallivar.frumetaceae(Roxb.) Link]. Incubation at 35 C caused the greatest inhibition of germination and growth.

scholarly journals Allelopathic Potential of Sorghum bicolor at Different Phenological Stages

2019 ◽  
Vol 37 ◽  
Author(s):  
V. ZUCARELI ◽  
E.M.P. COELHO ◽  
W.V. FERNANDES ◽  
E.M. PERES ◽  
J. STRACIERI
Keyword(s):  
Sorghum Bicolor ◽  
Aqueous Extract ◽  
Dry Matter ◽  
Germination Rate ◽  
Inhibitory Effect ◽  
Allelopathic Effect ◽  
Initial Growth ◽  
Bioindicator Species ◽  
Phenological Stages ◽  
Allelopathic Potential

ABSTRACT: This study aimed to assess the allelopathic potential of the aqueous extract of the shoot of Sorghum bicolor at different phenological stages on seed germination and initial growth of kale (Brassica oleracea var. acephala) seedlings, which is considered a bioindicator species. The experiment was carried out at five development stages of S. bicolor (40, 50, 60, 70, and 80 days after emergence), which was used as aqueous extract at six concentrations (0, 20, 40, 60, 80, and 100%) applied in four replications per treatment in 10 or 50 kale seeds per plot. The percentage of germination, germination rate index, root growth, shoot length, and dry matter of kale seedlings were analyzed in the presence of this extract on different days of collection and concentrations. The aqueous extract of S. bicolor presented an allelopathic effect on germination and initial growth of kale seeds, with a higher inhibitory effect when more concentrated extracts from pre-flowering plants were used, which corresponds to 60 days after emergence. Thus, this stage should be recommended in the use of S. bicolor straw to help in controlling weeds.

scholarly journals Azospirillum brasilense INOCULATION ON SEED GERMINATION AND INITIAL GROWTH OF SEEDLINGS OF NATIVE FOREST SPECIES

FLORESTA ◽  
2021 ◽  
Vol 51 (4) ◽  
pp. 855
Author(s):  
Francival Cardoso Felix ◽  
Daniele Cristina Pereira de Matos ◽  
Leandro Porto Latoh ◽  
Renata De Almeida Maggioni ◽  
Antônio Carlos Nogueira
Keyword(s):  
Seed Germination ◽  
Azospirillum Brasilense ◽  
Dry Weight ◽  
Native Forest ◽  
Initial Growth ◽  
Forest Species ◽  
Collar Diameter ◽  
Concentrated Solution ◽  
Germination And Growth ◽  
Growth Of Seedlings

Inoculation of rhizobacteria in seeds and plants has been documented as a stimulant and promoter of germination and growth of agricultural crops, but there is little information on native forest species. Therefore, the present study aims to evaluate the potential of Azospirillum brasilense inoculation in the germination of seeds and initial growth of seedlings of native forest species. The following experiments were carried out: (I) germination of seeds in germination chamber, and (II) initial growth of seedlings in nursery, both with four forest species (Cassia leptophylla, Lafoensia pacari, Mimosa flocculosa and Schinus terebinthifolius). For the four species, in both experiments, two treatments were used: inoculation of seeds with concentrated solution of A. brasilense and no inoculation of seeds (control). Physiological aspects of seed germination and seedling vigor were evaluated in the first experiment (germination speed, and length and dry weight of seedlings), and seedling growth was evaluated in the second experiment (height, collar diameter and dry weight of seedlings). Inoculation of A. brasilense in seeds of C. leptophylla, L. pacari, M. flocculosa and S. terebinthifolius did not promote beneficial or promising results for seed germination and initial growth of seedlings, so its use to produce seedlings of these species is not recommended.

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