scholarly journals Allelopathic effect of Celtis australis on germination and growth parameters of some important food crops of the Garhwal Himalayas

2018 ◽  
Vol 10 (3) ◽  
pp. 1003-1010
Author(s):  
Neha Pant ◽  
V. P. Khanduri ◽  
R. S. Bali ◽  
Pravin Rawat ◽  
Ram Gopal
Keyword(s):  
Triticum Aestivum ◽  
Lens Culinaris ◽  
Leaf Extract ◽  
Inhibitory Effect ◽  
Germination Percentage ◽  
Shoot Length ◽  
Allelopathic Effect ◽  
Aqueous Extracts ◽  
Maximum Inhibition ◽  
Celtis Australis

Present study was conducted to assess the allelopathic effect of leaf and bark aqueous extracts of Celtis australis on Triticum aestivum, Hordeum vulgare, Brassica rapa, Lens culinaris and Vigna umbellate under In-vitro condition. Different leaf and bark aqueous extracts 5%, 10%, and 15% were used to irrigate the seeds of test crops. The results revealed that the concentration dependent significant (p=0.05) inhibitory effect of aqueous leaf and bark extracts on germination, root and shoot length of all the test crops. Among all the test crops Triticum aestivum was found most sensitive where the germination percentage was reduced down to 46.0% by the leaf extract (15%) as compared to control (82.3%), while the maximum inhibition in the root length of  Lens culinaris (0.5 cm) by 10% leaf extract was observed as compare to control (8.2 cm). In shoot length maximum inhibitory effect was observed in Hordeum vulgare (3.5 cm) as compared to control (13.3 cm). Similarly, the bark extract showed the maximum inhibition in germination percentage of Lens culinaris (41.6%) at 15% concentration as compare to control (70.0%) while the maximum inhibition for the root length was recorded in Triticum aestivum (1.9 cm) at 15% concentration as compare to control (17.3 cm). In shoot length maximum inhibition was observed for Triticum aestivum (1.3 cm) at 10% extract level as compare to control (13.4 cm), while Vigna umbellate (5.5 cm) at 15% concentration showed stimulatory effect as compare to control (3.4 cm) exceptionally. Finally, it is concluded that Vigna umbellate exhibited the maximum tolerance against leaf and bark aqueous and might be a better option for intercropping with C. australis. However, the allelopathic effect on the other test crops can be minimized by removing the fallen leaves from the agricultural fields.

scholarly journals Allelopathic effect of Pinus roxburghii on an understorey plant, Bidens pilosa

2016 ◽  
Vol 5 (10) ◽  
pp. 1446 ◽  
Author(s):  
Neel Kant Sharma* ◽  
Daizy R. Batish ◽  
Harminder Pal Singh ◽  
R. K. Kohli
Keyword(s):  
Inhibitory Effect ◽  
Shoot Length ◽  
Allelopathic Effect ◽  
Initial Growth ◽  
Aqueous Extracts ◽  
Bidens Pilosa ◽  
Pinus Roxburghii ◽  
Needle Litter ◽  
Laboratory Bioassays ◽  
Understorey Plant

Allelopathic effect of Pinus roxburghii was studied on Bidens pilosa through laboratory and greenhouse experiments. The aqueous extracts of green needles, needle litter and bark were found to inhibit germination and initial growth of B. pilosa in laboratory bioassays. The inhibitory effect on germination root length, shoot length and biomass was also observed on amendment of powdered needle litter in soil in greenhouse pots. The inhibitory effect increased with increase in conc. of extracts or amount of litter amended. The amended soil was found to be rich in phenolics, the known potent allelochemics. The study indicates that such interactions may also be operational in forests of P. roxburghii.

scholarly journals Allelopathic effects of Eucalyptus citriodora on amaryllis and associated grassy weed

2009 ◽  
Vol 27 (spe) ◽  
pp. 887-899 ◽  
Author(s):  
K.G El-Rokiek ◽  
R.A Eid
Keyword(s):  
Leaf Extract ◽  
Petri Dish ◽  
Germination Percentage ◽  
Shoot Length ◽  
Aqueous Extracts ◽  
Wild Oat ◽  
Total Phenols ◽  
Eucalyptus Citriodora ◽  
Fresh Leaf ◽  
Root And Shoot Length

A Petri dish assay was carried out for screening different concentrations of aqueous extracts of fresh and dry leaves of Eucalyptus citriodora on germination and seedling growth of wild oat weed (Avena fatua). Seed germination, root and shoot length of wild oat exhibited different degrees of inhibition according to the concentration of the aqueous extract. Maximum inhibitions of germination percentage, root and shoot length were recorded when using 25% fresh leaf extract. Based on this preliminary work (Petri dish assay), studies were conducted under greenhouse conditions at the National Research Center, Egypt, in the two winter seasons of 2006/2007 and 2007/2008 to evaluate the effects of foliar and soil treatments of aqueous extracts of Eucalyptus citriodora fresh and dry leaves on wild oat weed as well as on the growth and flowering of amaryllis (Hippeastrum hybridum), compared with the recommended dose of the herbicide tralkoxydim. Amaryllis fresh and dry weights as well as flowering increased significantly when treated with the previous extracts, especially the fresh leaf extract. However, the fresh and dry weights of wild oat were significantly reduced by the aqueous extracts, either fresh or dry, indicating phytotoxic effects. Tralkoxydim caused complete inhibition of wild oat as compared with the control. The studies involved estimation of the endogenous contents of total phenols in weed. With all the treatments, the inhibitory effects on weeds were correlated with accumulation of the internal contents of total phenols, compared to their respective controls. The amount of phenols correlated well with the weed's growth performance. This study establishes the effect of the aqueous extracts on the weed wild oat, associated with amaryllis, which may serve as a tool in establishing their herbicidal potential.

scholarly journals Allelopathic effect of different accessions of Jatropha curcas on field crops in Bundelkhand Region (U.P.) India

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Neel Ratan ◽  
Ghan Shyam ◽  
R.K. Gupta ◽  
U.N. Singh
Keyword(s):  
Triticum Aestivum ◽  
Jatropha Curcas ◽  
Linum Usitatissimum ◽  
Raphanus Sativus ◽  
Leaf Extract ◽  
Allelopathic Effect ◽  
Lens Esculenta ◽  
Field Crops ◽  
Maximum Inhibition ◽  
Aqueous Leaf Extract

Allelopathic effect of three accessions of Jatropha curcas on four field crops viz. Triticum aestivum, Raphanus sativus, Linum usitatissimum and Lens esculenta through bioassy was studied in laboratory. The level of inhibition of aqueous leaf extract of J. curcas varied with its accessions and type of tested field crops. The tolerance of the crops was in order of Lens esculenta > T. aestivum > Raphanus sativus > Linum usitatissimum. Invariably, maximum inhibition was observed in the higher concentrations of aqueous extract.

scholarly journals Effect of Different Concentrations of Aqueous Leaf Extracts of Some Plants on the Germination and Seedling Growth of Maize, Z. mays L. and Wheat (T. aestivum L.)

2014 ◽  
Vol 3 (3) ◽  
pp. 264-274
Author(s):  
Rizwan Ali Khan ◽  
Kaiser Iqbal ◽  
Aatif Hussain ◽  
Showkat Azeem
Keyword(s):  
Triticum Aestivum ◽  
Leaf Extract ◽  
Root Elongation ◽  
Zea Mays L ◽  
Inhibitory Effect ◽  
Allelopathic Effect ◽  
Food Crops ◽  
Leaf Extracts ◽  
Leaf Leachate ◽  
Aqueous Leaf Extract

Allelopathic effect of aqueous leaf extract of three different species (eucalyptus, guava, and litchi) were used to investigate their effect on germination, shoot and root lengths of two food crops viz. Zea mays L. (Maize) and Triticum aestivum (Wheat). Mature fresh leaves of three species were crushed and soaked for 24h; the filtrates were diluted to make different concentrations (T1 = 0.5%, T2 = 1.0%, T3 = 1.5%, T4 = 2.0%, and T5 = 0.0%), and were used to investigate their effect on the tested crops. The aqueous leaf leachate of three species was found to have inhibitory effect on germination, shoot, and root elongation on the tested crops. Current study indicates that inhibitory effect was much more pronounced at higher concentrations, and the effect increased with the increase in concentration. Among trees, Eucalyptus has much more effect on the tested crops than other species. DOI: http://dx.doi.org/10.3126/ije.v3i3.11085 International Journal of Environment Vol.3(3) 2014: 264-274

Allelopathic Potency and an Active Substance from Hairy Vetch

2020 ◽  
Author(s):  
Weihong Sun ◽  
Guofeng Yang ◽  
Lili Cong ◽  
Juan Sun ◽  
Lichao Ma
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Root Length ◽  
Leaf Extract ◽  
Growth Inhibitor ◽  
Inhibitory Effect ◽  
Allelopathic Effect ◽  
Coumaric Acid ◽  
Hairy Vetch ◽  
Allelopathic Effects

Background: Plant allelopathy refers to the release of chemicals from plants or microorganisms into the environment, may have direct or indirect, beneficial or harmful effects on other plants or microorganisms. When plants grow in an unfavorable environment,more allelochemicals will be secreted and the expression of allelopathic effects will increase, giving plants a certain competitive advantage. Hairy vetch is one of the most promising allelopathic crops and the aqueous extract of hairy vetch has an inhibitory effect on the root length and seedling height of grass crops. The current study aimed to study the allelopathic effect of hairy vetch on alfalfa, and exploring an ecological method to remove the root system of alfalfa.Methods: In this experiment, the allelopathic effects of the seeds, stems and leaves, roots extracts and root exudates (0, 3, 6, 9 and 12 mg·mL-1) on the seed germination and seedling growth of alfalfa were evaluated. And the main allelopathic substances from the stem and leaf extract were isolated and identified using high performance liquid chromatography- mass spectrometry (HPLC-MS).Result: The results showed that all of the extracts can inhibit alfalfa seed germination and seedling growth and stem and leaf extract had the strongest inhibitory effect, especially for inhibiting the root growth. A main allelochemical substance, o-coumaric acid, was screened out and the root length of alfalfa was completely inhibited at 1.6 mg·mL-1 of o-coumaric acid. The findings of these experiments show hairy vetch has strong allelopathic effect on alfalfa and o-coumaric acid is a chemical growth inhibitor.

Evaluation of Herbicidal Potential of Eucalyptus spp for Biological Control of Dactyloctenium aegyptium L.

2021 ◽  
Vol 20 (1) ◽  
pp. 186-191
Author(s):  
Amal Ehtaiwesh
Keyword(s):  
Foliar Application ◽  
Growth Traits ◽  
Negative Impact ◽  
Inhibitory Effect ◽  
Germination Percentage ◽  
Shoot Length ◽  
Dactyloctenium Aegyptium ◽  
Vigor Index ◽  
Root And Shoot Length ◽  
Germination Traits

Pots culture experiment was conducted to evaluates the herbicidal potential of Eucalyptus spp. (aceae) on growth of Dactyloctenium aegyptium L. (Poaceae). Leaves extract with concentrations of 10, 20 and 40% of Eucalyptus plant were applied as soil and foliar application to seeds and seedlings of D. aegyptium species.  The result indicated that the application of Eucalyptus leaves extracts caused significant reduction in germination traits, root and shoot length, seedling fresh and dry weights. Also, the result revealed that the Inhibitory effect of Eucalyptus extract on D. aegyptium L was more noticeable in plant growth traits than on germination traits. Results show that among the different concentration of Eucalyptus leave extracts used in this study, 40% was the most toxic and caused the significant effect on germination and growth traits of Dactyloctenium aegyptium. Application of 40% of Eucalyptus leave extract decreased germination percentage by 30%, mean daily germination by 45%, shoot length by 38%. root length by 54%, number of branches by 61%, number of leavesby59%, seedling fresh weights by 23%, seedling dry weights by 62% and seedling vigor index by 60%. The results of this study concluded that the use of Eucalyptus plants have the potential to be developed further as a bio-herbicide system to control weed such as Dactyloctenium aegyptium L. However, more researches are needed to evaluate the negative impact of Eucalyptus on crop growth.

scholarly journals In vitro allelopathic effect of aqueous extracts of sugarcane on germination parameters of wheat

2017 ◽  
Vol 109 (2) ◽  
pp. 349 ◽  
Author(s):  
Abdul Majeed ◽  
Zahir MUHAMMAD ◽  
Manzoor HUSSAIN ◽  
Habib AHMAD
Keyword(s):  
Germination Percentage ◽  
Allelopathic Effect ◽  
Aqueous Extracts ◽  
Wheat Growth ◽  
Plant Parts ◽  
Seedling Biomass ◽  
Mean Germination Time ◽  
Germination Indices ◽  
Germination Parameters

Allelopathy – interactions among plants for resources along with competition – is a composite phenomenon which has spacious potentials of application in agriculture. Understanding of interactions among plants, particularly cultivated crops, may be helpful in modifying crop cultivation pattern with consequent yields increments. In this study, we investigated the allelopathic effects of aqueous extracts of root, stem peels and leaves of sugarcane (<em>Saccharum officinale</em> L.) cultivar <em>51</em> at concentrations 0, 2.5, 5.0, 7.5 and 10.0 g/l on germination indices and seedling biomass of wheat (<em>Triticum aestivum </em>L.) cultivar <em>Pirsabak-2005</em>. Results demonstrated that higher concentration (10.0 g/l) of extracts of root, stem peels and leaves significantly decreased mean germination time (MGT) but increased shoot and seminal root growth and seedling dry biomass; however, germination percentage was affected neither by extract concentration nor by plant parts used in the study. Extract concentrations up to 7.5 g/l had no effect on the studied parameters of wheat. Our result suggests that sugarcane’s allelopathy demonstrates healthy effects on wheat growth and that wheat could be cultivated in sequential rotation in field conditions.

scholarly journals Allelopathic Effect of Leaf Extract of Two Wild Plants on Seed Germination, Shoot and Root Lengths of Two Weed Species; Portulacaoleracea and Chenopodium murale

2018 ◽  
Vol 15 (4) ◽  
pp. 929-935 ◽  
Author(s):  
Nadi Awad Al-Harbi
Keyword(s):  
Seed Germination ◽  
Weed Management ◽  
Leaf Extract ◽  
Inhibitory Effect ◽  
Portulaca Oleracea ◽  
Wild Plants ◽  
Allelopathic Effect ◽  
Weed Species ◽  
Chenopodium Murale

The present study aims to evaluate the effect of leaf extract of Rhanterium epapposum and Salsola imbricata at various concentrations (20%, 40%, and 60%) on the germination and shoot and root lengths of two weed species; Portulaca oleracea and Chenopodium murale. The present study findings proved that the inhibitory effect of seed germination and shoot and root lengths of the studied species was largely dependent on the concentration of R. epapposum and S.imbricata leaf extract. The results showed that the highest allelopathic effect on the germination of the seeds of C.murale by leaf extract of R. epapposum and S. imbricata especially at concentration of 40% and 60% . While the lowest effect was of the leaf extract of S.imbricata. However the concentration of 60% was higher on the germination of the seeds C. murale and P. oleracea. Results also showed that the root and shoot lengths of C. murael was more sensitive to allelochemicals of R. epapposum leaf extract compared to S.imbricata leaf extract. However, the root and shoot lengths of P. oleracea was more sensitive to allelochemicals of S. imbricata leaf extract compared to R.epapposum leaf extract. Hence, the present findings recommended using the R. epapposum leaf extract and S. imbricata leaf extract as a tool for weed management especially C. murale and P. oleracea.

scholarly journals Inhibitory impact of Daraikh (Melia Azedarach) leaves litter on wheat (Triticum aestivum) seedling

2021 ◽  
Vol 27 (2) ◽  
pp. 191-200
Author(s):  
Iqtidar Hussain
Keyword(s):  
Triticum Aestivum ◽  
Negative Impact ◽  
Seedling Emergence ◽  
Dry Weight ◽  
Inhibitory Effect ◽  
Germination Percentage ◽  
Melia Azedarach ◽  
Growth Stages ◽  
Initial Growth ◽  
Coleoptile Length

A biological phenomenon by which one plant releases some chemicals in the environment that affect the rate of germination, its seedling emergence and physiology and overall growth of neighboring plants is called allelopathy. The significance of study was checked allelopathic phytochemical potential of Daraikh (Melia Azedarach L.) leaves on Wheat. Leaves litter were used to examine the allelopathic effects of Daraikh (Melia Azedarach) at five concentrations (100, 200, 300, 400 g, control) parameters studied germination percentage (%), Speed of germination, plant height (cm), root length (cm), Shoot length (cm), coleoptile length (cm), Fresh weight (g) and dry weight (g), Tiller (plant-1) and chlorophyll content (µ cm-2) of Triticum aestivum. All concentration of Leaves litter of Melia Azedarach showed pronounced inhibitory effect on all parameters of Triticum aestivum. Melia Azedarach exerted phytotoxic influence on Triticum aestivum at initial growth stages. Melia Azedarach exhibited a significant negative impact on germination of Triticum aestivum at 100, 200, 300, 400 g litter of leaves than control (Sterilized soil) repectively. Melia Azedarach halted the coleoptile length of Triticum aestivum @ 400 g leaves litter. Powdered leaves of Melia Azedarach in clay loam soil appeared to have strong allelopathic inhibition under maximum concentrations on growth and germination of Triticum aestivum. Hence, Melia Azedarach proved a strong allelopathic plant that should be planted aside from field to avoid harmful impacts during early growth stages of Triticum aestivum.

scholarly journals Effect of PEG and mannitol to induce drought stress on seed quality and stand establishment in wheat (Triticum aestivum L.) genotypes

2021 ◽  
Vol 17 (2) ◽  
pp. 469-475
Author(s):  
S. B. Patil ◽  
Jitendra Kumar S. Hilli
Keyword(s):  
Triticum Aestivum ◽  
Drought Tolerance ◽  
Root Length ◽  
Seed Quality ◽  
Block Design ◽  
Triticum Aestivum L ◽  
Germination Percentage ◽  
Shoot Length ◽  
Seedling Vigour ◽  
Wheat Genotypes

An experiment was conducted to study the screening of wheat (Triticum aestivum L.) genotypes for drought tolerance under laboratory condition during2018 at Department of Seed Science and Technology, College of Agriculture, Vijayapura. The experiment was carried out in a factorial Complete Randomized Block Design with seven treatments replicated three times. Twenty six wheat genotypes were screened for drought tolerance using 0, 15, 30, 60 per cent polyethylene ethylene glycol 6000 (PEG6000) and 1, 2, 5 per cent mannitol solutions. Data were recorded on various seedling parameters like germination percentage, root length, shoot length, seedling dry weight and seedling vigour index. The seedling traits showed a decreasing trend in response to increased concentrations of PEG6000 and mannitol. Wheat genotype DBW-110 (98.70 %) and C-306 (92.50 %) were found to be the best genotype for screened based on germination percentage at 15 per cent PEG6000 and 5 per cent mannitol. Wheat genotypes HI-1620 (6.7 cm) and NIAW-3212 (4.5 cm) produced maximum root length, respectively at higher concentrations of PEG6000 and mannitol. The genotype HI-1620 (6.4 cm, @ 15 %; 5.4 cm, @ 5 % mannitol) showed maximum shoot length. The genotype HD-2733, DBW-14, DBW-88 showed highest reduction of seedling parameters observed at increase in osmotic stress condition.

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