Plant Allelopathy
A K M Mominul Islam; Md Azhiat-ul-Haque Hia; Md Anwarul Abedin; Md Jewel Alam; Md Parvez Anwar; A K M Aminul Islam
Abstract
Purpose: The experiment was conducted to investigate into the allelopathic potential of the aqueous extracts of different parts of Jatropha curcuson seven selected field crop species. Research method: The leaf, stem, bark, twig, root, pericarp, seed and oilcake extracts of J. curcus at four different ...
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Purpose: The experiment was conducted to investigate into the allelopathic potential of the aqueous extracts of different parts of Jatropha curcuson seven selected field crop species. Research method: The leaf, stem, bark, twig, root, pericarp, seed and oilcake extracts of J. curcus at four different concentrations (1:5, 1:10, 1:15 and 1:20 (w/v)) were tested against jute, mungbean, mustard, radish, rice, wheat and tomato. Control i.e. distilled water without extracts was also maintained in each case. The experiments were conducted following completely randomized design with three replications. Findings: Except few, the aqueous extracts of J. curcas plant parts significantly inhibited the seedling growth of all the test species at concentration more than 1:15 (w/v) whereas, at or below this level stimulated the seedling growth. Percent shoot and root growth inhibition of the test crops varied among J. curcus parts extract from 10 to 100, at 1:5 (w/v) concentration. At the same concentration, J. curcas oilcake extract completely (100%) inhibited the shoot and root growth of all the test crop species except rice. Similarly, seed extract completely inhibited (100%) the shoot and root growth of jute and mustard, whereas around or more than 70% inhibition of the shoot and root growth of all the test species except rice. These results confirm that J. curcushas allelopathic properties and may possess allelochemicals. Since oilcake of J. curcus extract had greater inhibitory activity than other parts, this could be used for isolation and identification of allelochemical(s). The results of this experiment will be helpful for the researchers to know the plant-plant interaction of J. curcus with its neighboring plant species or the intercrops introduce in Jatropha field. Limitations: There was no significant limitation to the report. Originality/Value: This research compares the allelopathic properties of different parts of Jatropha curcus on seven selected field crop species.
Plant Allelopathy
Oly Bhowmik; Sabina Yeasmin; A K M Mominul Islam; Md. Parvez Anwar; Abdul Shukor Juraimi
Abstract
Purpose: Aphanamixis polystachya (Wall.) R.N. Parker, belonging to Meliaceae family is very well known for its medicinal properties. But its allelopathic potentiality not yet has been reported. Hence, aqueous extracts of different parts of Aphanamixis polystachya were examined to investigate their allelopathic ...
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Purpose: Aphanamixis polystachya (Wall.) R.N. Parker, belonging to Meliaceae family is very well known for its medicinal properties. But its allelopathic potentiality not yet has been reported. Hence, aqueous extracts of different parts of Aphanamixis polystachya were examined to investigate their allelopathic potentiality. Research Method: Different parts of A. polystachya extracts at four different concentrations (1:5, 1:10, 1:15 and 1:20 (w/v)) along with control (distilled water without extracts) were tested against jute, mungbean, mustard, radish, rice, wheat and tomato. The experiments were conducted following completely randomized design with three replicates. Findings: Among the test crop species, shoot growth of mustard was most sensitive (43% average inhibition (a.i.)) followed by radish (41% a.i.) to the extracts of different parts of A. polystachya., whereas shoot growth of tomato (14% a.i.) was less sensitive to the extracts followed by rice (25% a.i.) and mungbean (29% a.i.). Root growth of radish was most sensitive (41% a.i.) species followed by mustard (39% a.i.) and jute (36% a.i.) to the extract of different parts of A. polystachya. Root growth of mungbean (13% a.i.) was less sensitive to the extracts followed by tomato (18% a.i.) and rice (20% a.i.). Among the plant parts, leaf showed most phytotoxic activity on the shoot growth (41%) and twig on the root (40%) growth of the test plants. However, stem extract was less sensitive to both shoot and root growth of the test species. These results confirm that A. polystachyahas allelopathic properties and may possess allelochemicals. Research limitations: There was no significant limitation to the report. Originality/Value: To the best of our knowledge this is the first report about the allelopathic potential of Aphanamixis polystachya.
