scholarly journals Allelopathy effect of aqueous extract of Clerodendrum viscosum, Ageratum conyzoides and Parthenium hysterophorus on the seed germination and seedling vigour of Chickpea seeds (Cicer arietinum L.) in vitro

2013 ◽  
Vol 5 (1) ◽  
pp. 37-40 ◽  
Author(s):  
Oinam Ibetombi Devi ◽  
Biman Kumar Dutta ◽  
P. Choudhury
Keyword(s):  
Seed Germination ◽  
Leaf Extract ◽  
Parthenium Hysterophorus ◽  
Allelopathic Effect ◽  
Ageratum Conyzoides ◽  
Leaf Extracts ◽  
Seedling Vigour ◽  
Clerodendrum Viscosum ◽  
Test Plants

In present study the allelopathic effect of aqueous leaf extracts of Clerodendrum viscosum, Ageratum conyzoides and Parthenium hysterophorus was observed on the seed germination of Chickpea in vitro (Cicer arietinum.L.).Seed germination was found to be inhibited in all the leaf extract concentrations used i.e. 2%,4%,6%,8% and 10%. However higher inhibition was observed in the 10% leaf extract of the test plants (i.e. Cl. viscosum, Ag. conyzoides and P. hysterophorus). In compare to all allelopathic plants extracts more inhibition was found in P. hysterophorus leaf extract followed by Cl. viscosum and Ag. conyzoides. Higher inhibition of radical and plumule growth of the Chickpea seeds was found with the increase in concentration of the leaf extracts used. Percentage of germination of Chickpea seeds was found to be low in 10% concentration whereas in untreated seeds it was found to be more.

scholarly journals Allelopathic Interference of Ageratum conyzoides L. against Rice Varieties

2020 ◽  
pp. 69-76
Author(s):  
Bhawna Negi ◽  
S.S Bargali ◽  
Kiran Bargali ◽  
Kavita Khatri
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Leaf Extract ◽  
Water Soluble ◽  
Allelopathic Effect ◽  
Aqueous Extracts ◽  
Ageratum Conyzoides ◽  
Leaf Extracts ◽  
Rice Varieties ◽  
Seedling Length

Ageratum conyzoides L. is an invasive weed that has severely infested cultivated lands and interferes with the growth of crops. In this study aqueous extracts of 50 and 100% concentration were prepared from fresh and air dried plant parts (Leaves and roots) of A. conyzoides and their allelopathic effect was observed on seed germination and seedling growth of two rice varieties namely Sava and Geru. In Sava variety, a significant reduction in seed germination, seedling length and dry weight was recorded under dry leaf extract while under fresh leaf extract seed germination and seedling length was increased at 50% concentration as compared to control. In Geru variety both fresh and dry leaf extracts resulted in decreased seed germination and seedling growth with increasing concentration. Similar patterns were recorded for fresh and dry root extracts. The inhibitory effect of leaf extracts was more pronounced than root extract and overall dry aqueous extracts of leaf and root were more inhibitory than fresh aqueous extracts. Among varieties, Sava was least affected as compared to the Geru. This study indicated that A. conyzoides exert allelopathic effect towards rice crop by releasing water soluble phytochemicals.

scholarly journals Allelopathic Effect of Artemisia Dubia Extracts on Seed Germination and Seedling Growth of Some Weeds and Winter Crops

2015 ◽  
Vol 21 ◽  
pp. 23-30
Author(s):  
Baby Babita Das Mallik ◽  
BD Acharya ◽  
M Saquib ◽  
MK Chettri
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Leaf Extract ◽  
Cyperus Rotundus ◽  
Allelopathic Effect ◽  
Ageratum Conyzoides ◽  
Bidens Pilosa ◽  
Winter Crops ◽  
Allelopathic Effects ◽  
Artemisia Dubia

Allelopathic effects of aqueous extract of different plant parts (root, stem and leaf) of Artemisia dubia on seed germination and seedling growth of two winter crops (Triticum aestivum and Brassica campestries, and some associated weeds (Bidens pilosa, Ageratum conyzoides, Galinsoga parviflora and Cyperus rotundus) have been investigated in the present study. Extracts of root, stem and leaves of Artemisia dubia showed significant reduction in germination and seedling growth of test crops and weeds. Germination of crop and weed seeds and growth of shoot and root were reduced significantly in test treatments in comparison to the control. The seed germination, shoot length and root length were low at higher concentration. Complete inhibition of seed germination of Ageratum conyzoides, Galinsoga parviflora and Cyperus rotundus at 5 and 10% leaf extract of A.dubia was observed. Allelopathic effects were more pronounced with leaf extract than root or stem extract in most cases.The result indicated difference in allelopathic effect on crop seed and weed seed at higher concentrations. ECOPRINT 21: 23-30, 2014DOI: http://dx.doi.org/10.3126/eco.v21i0.11901

scholarly journals Studies on Allelopathic Effect of Aqueous Leaf Extract of Putranjiva Roxburghii Wall. on Seed Germination and Early Growth of Chickpea (Cicer Arietinum L.)

2019 ◽  
Author(s):  
Satyajit Oraon ◽  
Subrata Mondal
Keyword(s):  
Seed Germination ◽  
Leaf Extract ◽  
Inhibitory Effect ◽  
Early Growth ◽  
Growth Stages ◽  
Allelopathic Effect ◽  
Leaf Extracts ◽  
Cicer Arietinum L ◽  
Aqueous Leaf Extract ◽  
Putranjiva Roxburghii

The present study reveals the allelopathic effect of aqueous leaf extracts of Putranjiva roxburghii Wall. on seed germination and early growth stages of an economically important plant chickpea (Cicer arietinum L.). Aqueous leaf extracts at 0, 5, 10, 15, 25, 35, 50, 75 and 100% concentrations were applied to determine their effect on seed germination and early growth stages under laboratory conditions. Laboratory-based experiments with three replicates were used to arrange treatments accordingly. After 5 days of incubation the rate of seed germination, radicle length and hypocotyls length etc. of chickpea seeds were observed after treatment with aqueous leaf extracts. Highest inhibitory effect was noticed in 100% of aqueous leaf extract. Results indicated that the inhibitory effect was proportional to the concentration of the extracts. The water soluble leaf extracts contain allelochemicals, which inhibit the seed germination and reduced the early growth of chickpea.

scholarly journals Allelopathic Potential of Etlingera coccinea (B.) Sakai & Nagam on Seed Germination and Growth of Mung Bean and Siam Weed

2021 ◽  
Vol 15 (2) ◽  
pp. 79-89
Author(s):  
Mohamad Nadzrin Mohamad Zainurin ◽  
◽  
Nurfitri Harman ◽  
Lo Chor Wai ◽  
◽  
...  
Keyword(s):  
Seed Germination ◽  
Mung Bean ◽  
Suppressive Effect ◽  
Allelopathic Effect ◽  
Weed Species ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Methanolic Extracts ◽  
Germination And Growth

Etlingera coccinea, a native Borneon Zingiberaceae are found to exert allelopathic effect on some weed species. The objective of this study is to investigate the allelopathic effects of hexane (80%), methanol (80%), ethyl acetate (80%) extracts from the dried powder of both stem and leaf of E. coccinea on mung bean (Vigna radiata) and Siam weed (Chromolaena odorata). The phytochemical screening of both stem and leaf crude extracts elicited saponin, tannin, flavonoid, and terpenoid, which are targeted bioactive compounds for allelopathy. The allelopathic activity was assessed by evaluating their effects on seed germination and percentage of radicle and shoot growth. The results showed that both stem and leaf extracts have a suppressive effect on the mung bean development during in-vitro bioassay. The methanolic extracts of both stem and leaf showed the most significant suppression (100%) than other solvent extracts. In the pot experiment, the methanolic stem extracts suppressed the Siam weed’s germination by 57 ± 0.13% and the methanolic leaf extracts suppressed the growth by 46 ± 0.29%. The present study shows that E. coccinea methanolic extract has the potential as bio-herbicide.

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.

scholarly journals Evaluation of Some Indigenous Plant Extracts for Suppressing Bipolaris sorokiniana in Wheat Seed

2010 ◽  
pp. 96-104
Author(s):  
Rokshana Panna ◽  
FM Aminuzzaman ◽  
MR Islam ◽  
MHM Borhannuddin Bhuyan
Keyword(s):  
Seed Germination ◽  
Plant Extracts ◽  
Leaf Extract ◽  
Bipolaris Sorokiniana ◽  
Leaf Extracts ◽  
Pathology Laboratory ◽  
Black Cumin ◽  
Seed Pathology ◽  
Indigenous Plant ◽  
Black Cumin Seed

Studies were conducted in the Seed Pathology Laboratory, Department of Plant Pathology, Sher-e-Bangla Agricultural University to evaluate some indigenous plant extracts on the incidence of Bipolaris sorokiniana of wheat and seed germination. Seed treated with plant extracts reduced the incidence of Bipolaris sorokiniana. The lowest incidence was counted (12.33%) in seeds treated with Burmuda grass extracts (1:2W/V). While the highest seed germination (99.60%) was recorded in seeds treated with this grass extract followed by 99.33% germination in seeds treated with Neem leaf extract (1:2W/V), 98.00% with nut sedge grass rhizome extract (1:2 W/V), 87.67% with Allamanda leaf extract (1:2W/V). Comparatively the lowest incidence of Bipolaris sorokiniana (14.00%) was observed in seeds treated with Neem leaf extracts (1:2W/V) followed by 14.50% in seeds treated with Nut sedge grass rhizome extracts (1:2W/V), Black cumin seed extracts (15.20%) and Allamanda leaf extract (24.00%).

scholarly journals Swailing affects seed germination of plants of European bio-and agricenosis in a different way

2017 ◽  
Vol 12 (1) ◽  
pp. 62-75 ◽  
Author(s):  
Renata Bączek-Kwinta
Keyword(s):  
Seed Germination ◽  
Agricultural Practice ◽  
Seedling Vigour ◽  
Habitat Composition ◽  
Indirect Impact ◽  
Wild Thyme ◽  
Plant Habitat ◽  
Seed Testa ◽  
Stimulation Of

AbstractSwailing as a part of agricultural practice is an illegal habit in many European countries. The indirect effect of swailing is the emission of volatiles (SGV), hence the aim of the study was to identify their impact to seeds of different species occurring or grown Europe. It was carried out on seeds of 29 species of 10 botanical families within the angiosperms. The response to SGV was more or less differentiated within a family, and even within the species, e.g. in the case of tomato. The stimulation of germination and/or increased seedling vigour was established in celery, green- and red-leafed basil, white and red cabbage, white clover and wild thyme. The same effect was noticed for the seeds of stratified broadleaf plantain and the positively photoblastic seeds of German chamomile germinated in darkness. The inhibition of seed germination and/ or reduced seedling vigour was demonstrated in case of caraway, dill and forget-me-not. Similar results were obtained in the experiments carried outin vitroand in the soil, hence it can be assumed that the indirect impact of SGV on plant habitat composition is likely. The interaction of SGV compounds with seed testa and seed phytohormones is discussed.

scholarly journals The PHYTOCHEMICALS, ANTIOXIDANT AND ANTIMICROBIAL PROPERTIES OF Senna alata AND Senna tora LEAF EXTRACTS AGAINST BACTERIAL STRAINS CAUSING SKIN INFECTIONS

2019 ◽  
Vol 2 (1) ◽  
pp. 19
Author(s):  
Murni Halim
Keyword(s):  
Leaf Extract ◽  
Antimicrobial Properties ◽  
Inhibition Zone ◽  
Antimicrobial Activities ◽  
Diffusion Method ◽  
Bacterial Strains ◽  
Leaf Extracts ◽  
Natural Drugs ◽  
Senna Alata

A study was carried out to screen for phytochemical constituents and assess the antioxidant and antimicrobial activities of Senna alata and Senna tora leaf extracts. The leaves were first dried at room temperature and 50°C in an oven prior to solvent extraction using ethanol and methanol. The in-vitro qualitative assays showed that both S. alata and S. tora leaf extracts contained bioactive and secondary metabolites components such as tannins, steroids, saponin, terpenoids, glycosides, flavonoids and phenols. The antioxidant activity and capacity test were carried out by conducting free radical of 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity and Ferric reduction antioxidant plasma (FRAP) assays. Both assays showed S. tora leaf extract has higher antioxidant capacity than S. alata leaf extract. The efficacy of these leaf extracts were tested against skin pathogens through agar well diffusion method. S. alata extract showed an inhibition zone (1.15 – 1.59 mm) against Pseudomonas aeruginosa while S. tora extracts exhibited a strong antimicrobial activity against S. epidermidis (inhibition zone of 12 – 16.94 mm) followed by P. aeruginosa (inhibition zone of 1 – 1.59 mm). Nonetheless, no inhibition zone was observed for S. aureus by both leaf extracts. The phytochemicals and antioxidant constituents as well as inhibitory potential on skin pathogens possessed by S. alata and S. tora leave highlighted their potential utilization in the development of natural drugs or cosmetics to treat skin related diseases or infections.

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