Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Allelopathic Effects of Lantana Camara on Germination and Growth Behavior of Some Agricultural Crops in Bangladesh

Romel Ahmed
Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Shahjalal University of Science and Technology (SUST), Sylhet- 3114, Bangladesh

Mohammad Belal Uddin
Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Shahjalal University of Science and Technology (SUST), Sylhet- 3114, Bangladesh

Mohammed Abu Sayed Arfin Khan
Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Shahjalal University of Science and Technology (SUST), Sylhet- 3114, Bangladesh

Sharif Ahmed Mukul*
Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Shahjalal University of Science and Technology (SUST), Sylhet 3114, Bangladesh

Mohammed Kamal Hossain
Institute of Forestry and Environmental Sciences (IFES), Chittagong University, Chittagong 4331, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted to understand the growth inhibitory effects of aqueous extracts derived from Lantana camaraL. (a globally recognized invasive alien weed) on six popular agricultural crops of Bangladesh. The test was conducted in sterilized petridishes with a photoperiod of 24 hours and an average temperature of 29°C. The effect of different concentrations of L. camara leaf ex-tracts were recorded and compared with control (i.e., distill water). Result showed different concentrations of aqueous leaf extracts caused significant inhibitory effect on germination, root and shoot elongation and development of lateral roots of receptor crops. Bioassays also indicated that the inhibitory effect was proportional to the concentrations of the extracts and higher concentration had the stronger inhibitory effect whereas the lower concentration showed stimulatory effect in some cases. The inhibitory effect was much pronounced in root and lateral root development rather than shoot and germination.

Keywords: Lantana camara L.; Allelopathy; Agricultural crops; Germination, Growth

Location:

Start Date:

End Date:

Program Area: Development of Host and Medicinal Plants

Commodity: Medicinal Plants

Objectives:

An attempt to explore the allelopathic effects of L.camara water extracts on some common agricultural crops of Bangladesh.

Methodology:

The receptor plants The receptor agricultural crops were Brassica juncea (L.) Czern. (Indian mustard); Cucumis sativus L. (Garden Cucumber), Phaseolus mungo L. (Black Gram), Raphanus sativus L. (Rad-ish), Vigna unguiculata (L.)Walp. (Asparagus Bean) and Cicer arietinum L. (Bengal Gram). Donor plant and preparation of leaf extracts In the present experiment we have used L. camara (a widely found alien invasive weed species all over the country), as the donor plant. Beside, for preparation of aqueous L. camara leaf extracts, 100 g of fresh L. camara leaves was soaked in 500-mL distilled water and kept in a room temperature of 28-30°C, with-out allowing any possible chemical changes. After 24 h the aque-ous extract was filtered through the sieve and then some extracts were diluted to make the concentration of 10%, 25%, 50% and 75% (on the basis of volume) and stored for seed treatment experiments. Treatments The following treatments were followed during the experiment: T0 Seeds of receptor plants grown in distill water only (Control); T1 Seeds of receptor plants grown in extracts of 10% concentration; T2 Seeds of receptor plants grown in extracts of 25% concentration;T3 Seeds of receptor plants grown in extracts of 50% concentration; T4 Seeds of receptor plants grown in extracts of 75% concentration; T5 Seeds of receptor plants grown in extracts of 100% concentration.Germination and growth records The germination test was carried out in sterile petridishes of 12 cm in size placing a Whatman® no.3 filter paper on petridishes. The extract of each concentration was added to each petridish of respective treatment daily in such an amount just enough to wet the seeds. The control was treated only with distill water. 20 seeds of each receptor crop were placed in the petridish replicating 5 times. The petridishes were set in the room temperature of 28−30 °C. The experiment was extended over a period of seven days to allow the last seed germination and the measurement of the shoot and root length. A seed was considered as germinated, when radicle emerged. The germination was recorded daily and the results were determined by counting the number of germinated seeds, number of lateral roots and measuring the length of primary root and main shoot on seventh day of the experiment. Data obtained through the study were analyzed in variance and Duncan’s Multiple Range Test (DMRT). The germination and elongation ratio were calculated by the following equations as suggested by Rho and Kil (1986). R=G/Gr × 100 (1) where, R is the relative germination ratio, G the germination ratio of tested plant, and Gr is the germination ratio of control. Rs= Ms/ MC× 100 (2) where, Rs is the relative elongation ratio of shoot, Ms the mean shoot length of tested plant, MC the mean length of control. Rr=M/ Mc× 100 (3) where, Rr is the relative elongation ratio of root and M the mean root length of tested plant. For the calculation of percentage of inhibitory (or stimulatory) effect on germination and growth parameters of treatment plants to control, we used the following formula: I=100-(E2 × 100/E1) (4) where, I is the % inhibition (or stimulation); E1 the response of control plant, and E2 the response of treatment plant.

Source of Information: Journal of Forestry Research, 18 (4): 301-304 (2007)

Article Link (Online Journal): DOI: 10.1007/s11676-007-0060-6

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The observation of our study confirms the findings of Bansal (1998), who reported that the suppressed seed germination and seedling growth in all associated weeds and the suppressive effect increased with an increase in percent content increasing of L. camara extracts.The result also revealed that root elongation and lateral root developments of receptor crops were markedly inhibited compared to that of shoot elongation. These findings also were in accordance with the results of Alam 1990; Chou et al 1986 and Zackrisson and Nilsson 1992, in which root growth was more sensitive and responds more strongly to the increasing concentration of the aqueous extract. The suppressive effect of Lantana on other weeds may be caused by allelopathy. Lantana has also been reported to be allelopathic against milk weed vine (Morrenia odorata), velvet leaf (Abutilon theophrasti), and fern (Cyclossus dentatus) because of the presence of phenolic compounds. Allelochemicals from L. camara may, however, be different and need to be identified. Though laboratory bioassays in allelopathic researches are of great importance, a field study is recommend to confirm the allelopathic effects of Lantana on forest, tea garden and agricultural crops in various field conditions.

Knowledge Management: Journal