scholarly journals Allelopathic Potential of Medicinal Plants: Costus speciosus Koen ex. Retz and Justicia adhatoda Linn

2015 ◽  
Vol 28 ◽  
pp. 57-65 ◽  
Author(s):  
Anjana Devkota ◽  
Swasti Sharma
Keyword(s):  
Medicinal Plants ◽  
Inhibitory Effect ◽  
Allelopathic Effect ◽  
Allelopathic Potential ◽  
Plant Parts ◽  
Costus Speciosus ◽  
Pea Seedlings ◽  
Strong Inhibitory Effect ◽  
Justicia Adhatoda ◽  
Germination And Growth

The study was carried out to evaluate the allelopathic effect of aqueous extract of rhizome and leaves of Costus speciosus Koen ex. Retz and Justicia adhatoda Linn. respectively on germination and growth of wheat (Triticum aestivum Linn.) and pea (Pisum sativum Linn.). Effect was assessed by recording their effects on germination and percentage growth of root and hypocotyle of test plants. However, the extent of inhibitory and stimulatory effect of extracts varied with the plant species. The extract reduced the germination of the test seeds. However, root and hypocotyle elongations of wheat and pea seedlings were significantly inhibited by the extract of studied plant parts, with the percentage of inhibition increased as the concentration of the extract increased. The observed allelopathic activity of the extract of both medicinal plants on the seed germination and seedling growth of wheat and pea was attributed to the presence of the allelopathic phytochemicals in medicinal plants. The results showed that Justicia adhatoda Linn. had strong inhibitory effect on germination as well as root and hypocotyls growth of test seeds. Phytochemical screening of both medicinal plants was also carried out by using standard methods. The extract contained alkaloid, terpenoids, flavonoids, tannins and saponins in different proportions; with more of alkaloids, flavonoids and terpenoids. J. Nat. Hist. Mus. Vol. 28, 2014: 57-65

scholarly journals ALLELOPATHIC POTENTIAL OF WEED SPEICES AGERATUM CONYZOIDES L. AND CLEOME VISCOSA L. ON GERMINATION AND GROWTH OF SESAMUM INDICUM L

2015 ◽  
Vol 2 (2) ◽  
pp. 114-117
Author(s):  
Anbarasan R ◽  
Prabhakaran J
Keyword(s):  
Growth Parameters ◽  
Dry Weight ◽  
Inhibitory Effect ◽  
Germination Percentage ◽  
Sesamum Indicum ◽  
Weed Species ◽  
Ageratum Conyzoides ◽  
Allelopathic Potential ◽  
Germination And Growth ◽  
Cleome Viscosa

Various concentrations (5%, 10%, 15% and 20%) of aqueous extracts prepared from two weed species namely Ageratum conyzoides L. and Cleome viscosa L. and used for the present experiments to determine their allelopathic potential on growth and developmental changes on sesame (Sesamum indicum L.). The weed extracts showed an inhibitory effect on germination percentage, root and shoot growth, and fresh and dry weight of sesame seedlings. The extracts of A.conyzoides had more inhibitory effect at 20%concentration,than that of C.viscosa on growth parameters of sesame.

Allelopathic potential of Artemisia herba-alba and Anthemis arvensis to control Weeds in Wheat (Triticum aestivum) and Barley (Hordeum vulgare)

2016 ◽  
Vol 6 (3) ◽  
pp. 95-100
Author(s):  
Nadi Awwad Al Harbi
Keyword(s):  
Triticum Aestivum ◽  
Hordeum Vulgare ◽  
Aqueous Extract ◽  
Weed Management ◽  
Allelopathic Effect ◽  
Weed Species ◽  
Crop Species ◽  
Allelopathic Potential ◽  
Anthemis Arvensis ◽  
Germination And Growth

The aim of the present study was to investigate the potentials for utilization of Artemisia herba-alba and Anthemis arvensis shoot aqueous extract at different concentrations (1%, 3%, and 5%) to suppress the germination and growth of Panicum turgidum and Portulaca oleracea (weeds of crop fields) in Petri dish experiment. Results indicated that the degree of inhibition on seed germination and growth of the recipient species was largely dependent on the concentration of A. herba-alba and A.arvensis shoot aqueous extract. The aqueous extract of A.herba-alba showed the highest allelopathic effect on the germination of the seeds of P. turgidum, (10%,10% and 0%) while the effect of A. arvensis shoot aqueous extract was greater on the germination of the seeds P. oleracea (40%,0% and 0%). Percentage germination of the two selected crop species Triticum aestivum and Hordeum vulgare also de-creased as the A.herba-alba and A.arvensis shoot aqueous extract concentra-tion increased from 1% to 5% (90%,80% and 70%),(40%,40% and 20%). But the inhibition percentage was largely less than that of weed species. The results also showed that H.vulgare was more sensitive than T. aestivum and responds more strongly to the increase of concentration of A. herba-alba shoot aqueous extract . Results also showed that the radicle length of almost all tested species was more sensitive to allelochemicals from A.herba-alba and A.arvensis shoot aqueous extract than plumule length. Therefore, A. herba-alba and A. arvensis shoot aqueous extract may offer promises for their usefulness as a tool for weed management.

scholarly journals Allelopathic Potential of Papaver Somniferum L. on Seed Germination Against Three Different Varities of Zea Mays

2021 ◽  
Author(s):  
Muntaha Tul Sidra ◽  
SAYEDA SARAH MUBARAK ◽  
FATIMA KHAN SHERWANI ◽  
NAZMA AZEEM
Keyword(s):  
Zea Mays ◽  
Aqueous Extract ◽  
Water Extract ◽  
Inhibitory Effect ◽  
Papaver Somniferum ◽  
Hot Water ◽  
Allelopathic Effect ◽  
Inhibitory Effects ◽  
Allelopathic Potential ◽  
Hot Water Extract

Abstract Aims To evaluate the allelopathic effect of Papaver somniferum against the 3 varieties of Zea mays seeds cv. Azam, Pahari and Iqbal. Methods Aqueous extracts were made by soaking the powder of dried leaves of Papaver somniferum. For the aqueous extract treatment, the extract was soaked in distilled water for 24 and 48 hours separately. For mulching treatment, the seeds were sowed in soil and sprinkled powder of leaves. For litter, the petri dishes were grounded with randomly cut pieces of filter paper wetted with extract. For hot water treatment the water was boiled for 5 minutes. The powder was then mixed in boil water. Results Azam got effected in 24h extract in aqueous extract treatment while Pahari in 48h treatment. In mulching all the three varieties got inhibited by extract. Azam showed resistance toward the inhibitory effect of extract in litter experiments. Iqbal was affected in hot water extract. Conclusion It is concluded that the extracts obtained from Papaver somniferum showed inhibitory effects on all the three varieties except few exceptions of maize. The plumule and radical growth got affected the most.

scholarly journals Allelopathic Potential of Ethanolic Extract and Phytochemical Analysis of Paspalum maritimum Trind

2019 ◽  
Vol 37 ◽  
Author(s):  
J.C. PEREIRA ◽  
C.L.A. PAULINO ◽  
L. ENDRES ◽  
A.E.G. SANTANA ◽  
F.R.S. PEREIRA ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Condensed Tannins ◽  
Ethanolic Extract ◽  
Phytochemical Analysis ◽  
Allelopathic Effect ◽  
Active Fraction ◽  
Allelopathic Potential ◽  
Plant Parts ◽  
Allelopathic Effects ◽  
Donor Species

ABSTRACT: Allelopathy is defined as the ability of certain plants and microorganisms to interfere with the metabolism of other species through substances released into the environment, being an alternative to control weeds and diseases. In this context, this study aimed to evaluate the allelopathic potential and identify groups of secondary metabolites of Paspalum maritimum Trind. The species Lactuca sativa, Digitaria insularis, Emilia coccinea, and Portulaca oleracea were used as recipient plants. The ethanolic extract was obtained from shoot and root of donor species to evaluate the allelopathic potential. Potentially allelopathic effects were evaluated by means of germination tests, germination speed index, and initial seedling growth. A phytochemical analysis of the extract was also performed to identify the secondary metabolites. The ethanolic extract from both plant parts had an allelopathic effect on recipient species. The presence of condensed tannins, chalcones and aurones, flavonones, steroids, and saponins were detected in the most active fraction of the shoot of P. maritimum.

scholarly journals Comparative account of allelopathic potential of essential oil of Tagetes minuta L. and its major component cis-β-Ocimene

2016 ◽  
Vol 5 (09) ◽  
pp. 1428
Author(s):  
Komal Arora* ◽  
Daizy Batish ◽  
Harminder Pal Singh ◽  
Ravinder Kumar Kohli
Keyword(s):  
Essential Oil ◽  
Dry Weight ◽  
Inhibitory Effect ◽  
Test Plant ◽  
Allelopathic Effect ◽  
Western Himalayas ◽  
Plant Laboratory ◽  
Allelopathic Potential ◽  
Seedling Length ◽  
Tagetes Minuta

The study aims to explore the chemical composition of volatile essential oil of Tagetes minuta and comparison of its allelopathic potential with cis-β-ocimene, a major component of oil. T. minuta L. is an exotic aromatic plant found growing in northern plains and western Himalayas in India. The water distilled essential oil from aerial parts of T. minuta (at flowering stage) was analyzed by GC-MS. The analysis revealed 27 compounds representing 95.73% of the oil. cis-b-Ocimene (44.56%), dihydrotagetone (28.52%), limonene (3.99%) and tagetone (7.42%) were its major compounds. A comparison of allelopathic effect of cis-b-ocimene was made with T. minuta oil using Cassia occidentalis L., a common wasteland weed, as test plant.  Laboratory study included growth studies in the form of germination, seedling length and dry weight of test plant under both treatments i.e. T. minuta oil and cis-b-ocimene. The inhibitory effect of ocimene was more significant as compared to oil. However, highest concentration (20µg/cc) of both treatments was found to be inhibitory with respect to all parameters. 

scholarly journals Determination of the Allelopathic Potential of Cambodia’s Medicinal Plants Using the Dish Pack Method

2021 ◽  
Vol 13 (16) ◽  
pp. 9062
Author(s):  
Yourk Sothearith ◽  
Kwame Sarpong Appiah ◽  
Hossein Mardani ◽  
Takashi Motobayashi ◽  
Suzuki Yoko ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Inhibitory Effect ◽  
Inhibitory Effects ◽  
Bioactive Substances ◽  
Radicle Growth ◽  
Allelopathic Potential ◽  
Growth Inhibitory ◽  
Volatile Allelochemicals ◽  
Plant Families ◽  
Cymbidium Aloifolium

Plants produce several chemically diverse bioactive substances that may influence the growth and development of other organisms when released into the environment in a phenomenon called allelopathy. Several of these allelopathic species also have reported medicinal properties. In this study, the potential allelopathic effects of more than a hundred medicinal plants from Cambodia were tested using the dish pack method. The dish pack bioassay method specifically targets volatile allelochemicals. Twenty-five species were found to have significant inhibitory effects on lettuce radicle growth. Eleven different plant families, including Iridaceae (2), Apocynaceae (2), Poaceae (2), Sapindaceae, Araceae, Combretaceae, Orchidaceae, Clusiaceae, Zingiberaceae, Rutaceae and Asparagaceae had the plant species with high inhibitory effects. Allophyllus serrulatus had the highest growth inhibitory effect on lettuce radicles more than 60%, followed by Alocasia macrorrhiza, Iris pallida, Terminalia triptera, Wrightia tomentosa, Cymbidium aloifolium, Garcinia villersiana and Kaempferia parviflora. The candidate species were subjected to further studies to identify the volatile allelochemicals in the volatile constituents.

scholarly journals ALLELOPATHIC POTENTIAL OF EXTRACTS AND LEACHATES OF AZADIRACHTA INDICA A. JUSS LEAVES ON GERMINATION AND GROWTH OF ELEUSINE CORACANA (L.) GAERTNER

2015 ◽  
Vol 2 (2) ◽  
pp. 129-132
Author(s):  
Elavazhagan P
Keyword(s):  
Azadirachta Indica ◽  
Shoot Growth ◽  
Dry Weight ◽  
Inhibitory Effect ◽  
Germination Percentage ◽  
Eleusine Coracana ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Root And Shoot Growth ◽  
Germination And Growth

Various concentrations (5%, 10%, 15% and 20%) of leaf leachates and leaf extracts prepared from fully senesced fallen and matured leaves of Azadirachta indica A. Juss. and used for the present experiments to determine their allelopathic potential on growth and developmental changes on Eleusine coracana (L.) Gaertner. Leaf leachates and leaf extracts sowed an inhibitory effect on germination percentage, root and shoot growth, and fresh and dry weight of E. coracana seedlings. The leaf extracts had more inhibitory effect at 20%concentration,than that of leaf leachates on morphological parameters of E. coracana

scholarly journals Identification of Medicinal Plants in Homam: a religious practice

2016 ◽  
Vol 1 (1) ◽  
pp. 16
Author(s):  
K Kannathasan ◽  
A. Thangamani
Keyword(s):  
Medicinal Plants ◽  
Central Element ◽  
Religious Practice ◽  
Early Morning ◽  
Tinospora Cordifolia ◽  
Plant Parts ◽  
Ficus Benghalensis ◽  
Hindu Temples ◽  
Justicia Adhatoda ◽  
Scientific Name

In India, Homam is an important religious practice. The consecrated fire is the central element of the ritual homa. It is offered in many hindu temples in early morning before dawn. Apart from the temples, many hindus offer this practice during their home ceremonies also. The most beneficial factor of these homas, is that smoke not only purifies the atmosphere but also helps us to get rid of many diseases. In this paper, the local and scientific name, plant parts used in the Homam were identified and presented. Different plant parts like leaf, aerial root, fruit, seed, bark, root, flower, wood, tuber, rhizome and pericarp of fruits have been used in the practice. Some highly useful medicinal plants listed are Justicia adhatoda, Withania somnifera, Phyllanthus emblica, Tinospora cordifolia, Andrographis paniculata, Strychnos nux-vomica, Pongamia pinnata, Ficus benghalensis, Chrysopogon zizanioides and Curcuma aromatica. 

scholarly journals Allelopathic evidence in exotic guava (Psidium guajava L.)

2010 ◽  
Vol 53 (6) ◽  
pp. 1359-1362 ◽  
Author(s):  
Tatiani Elisa Chapla ◽  
João Batista Campos
Keyword(s):  
Seed Germination ◽  
Field Experiments ◽  
Psidium Guajava ◽  
Allelopathic Potential ◽  
Plant Parts ◽  
Extract Concentration ◽  
Allelopathic Activity ◽  
Lactuca Sativa L ◽  
Leaf Aqueous Extract ◽  
Germination And Growth

The allelopathic activity of the leaf aqueous extract of guava (Psidium guajava L.) on seed germination and root growth in lettuce (Lactuca sativa L.) was studied in an experiment consisting of four replicates with 10 seeds each and extract concentrations of 5, 10, and 20%. Guava allelopathic activity occurred during the germination and growth of lettuce roots at 20% extract concentration, as shown by ANOVA. This result suggested the allelopathic potential of the species. Therefore, the success of P. guajava in invading environments could be partially due to allelopathy. Further studies using other plant parts and field experiments should be conducted.

scholarly journals Essential oil of Lippia alba (Mill.) N.E.Br. influences the germination, vigor and emergence of lettuce seeds

2019 ◽  
Vol 13 (3) ◽  
pp. 416-425
Author(s):  
Leonardo Antonio Thiesen ◽  
Denise Schmidt ◽  
Marcos Vinícius Marques Pinheiro ◽  
Ezequiel Holz ◽  
Bruna Stringari Altissimo ◽  
...  
Keyword(s):  
Essential Oil ◽  
Inhibitory Effect ◽  
Allelopathic Effect ◽  
Lettuce Seed ◽  
Allelopathic Potential ◽  
Lippia Alba ◽  
Lettuce Seeds ◽  
Randomized Design ◽  
Germination Vigor ◽  
Environment Experiment

Secondary metabolites are produced by certain plant species and may influence the development of some species through the action of allelopathic effects. Thus, the objective of this study was to evaluate the allelopathic effect of Lippia alba essential oil on the germination, emergence and vigor of seedlings of different batches of lettuce seeds. This experiment was conducted in a completely randomized design with a 3´5 factorial scheme consisting of three batches of seeds of the cultivar Grand Rapids® and five doses of L. alba essential oil (0, 0.25, 0.50, 0.75 and 1.00%) diluted in distilled water and homogenized in Tween® 80. Seed germination and vigor, in the laboratory (experiment I), and emergence, in a protected environment (experiment II), were evaluated. The results demonstrated that there was an inhibitory effect with a significant reduction of germination, vigor and seed emergence when L. alba essential oil was added starting at concentrations of 0.25%. The essential oil showed allelopathic potential over different lettuce seed lots, affecting germination, vigor and seed emergence.

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