Allelopathic effect of methanol extracts from Tinospora tuberculata on selected crops and rice weeds

Farzad Aslania and Abdul Shukor Juraimi and Muhammad Saiful Ahmad-Hamdania and Dzolkhifli Omar and Md Amirul Alam and Farahnaz Sadat Golestan Hashemi and Md Abdul Hakim and Md Kamal Uddin (2014) Allelopathic effect of methanol extracts from Tinospora tuberculata on selected crops and rice weeds. Acta Agriculturae Scandinavica, Section B–Soil & Plant Science, 64. pp. 165-177. ISSN 0906-4710 (P-ISSN) , 1651-1913 (E-ISSN)

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Herbicidal potential of aerial parts of Tinospora tuberculata on germination and seedling growth of seven test plant species, namely rice (Oryza sativa L.); two rice weeds, barnyardgrass (Echinochloa crus-galli L.) and weedy rice (O. sativa f. spontanea); and four vegetable crops, lettuce (Lactuca sativa L.), tomato (Solanum lycopersicum L.), carrot (Daucus carota L.), and cucumber (Cucumis sativus L.) were evaluated. Six concentrations of methanol extract (3.12, 6.25, 12.5, 25, 50, and 100 g L−1 ) were compared with the control (distilled water). The rate of seed germination and the radicle and hypocotyl length of 7-day-old test plant seedlings were reduced as the concentration of extracts increased compared to the control. Generally, the degree of toxicity of extracts derived from the leaves was more than the extracts derived from the stem. Cluster analysis and the concentrations required for 50% inhibition (defined as EC50) of all parameters showed that radicle growth was more suppressed than germination and hypocotyl growth. Lettuce and carrot were observed as the most sensitive plants while rice showed the highest tolerance to both extracts. Moreover, the dicot target plants were affected more severely than the monocots when treated with leaf extract. The chemical composition of the T. tuberculata methanolic extracts was analyzed by a GC–MS system. A total of 92 and 22 constituents (not previously identified) were found in the leaves and stem, respectively. The results showed that 17 of the 92 components in the leaves, as compared to 4 of 22 compounds in the stem, are known as toxic compounds. These results suggest that T. tuberculata contains a significant source of plant growth inhibitors with potential for the development of future natural herbicide.

Item Type: Article
Keyword: Allelopathy , Cluster analysis , GC–MS , Natural herbicide , Plant growth inhibitors
Subjects: Q Science > QK Botany > QK1-989 Botany
S Agriculture > SB Plant culture > SB1-1110 Plant culture
Department: FACULTY > Faculty of Sustainable Agriculture
Date Deposited: 22 Nov 2022 11:15
Last Modified: 22 Nov 2022 11:15

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