Survey the Allelopathic Effects of Tobacco (Nicotiana Tabacum L.) on Corn (Zea Mays L.) Growth and Germination

Abstract

Allelopathy is the direct influence of chemical released from one plant on the development and growth of another plant. The trial accomplished in seed technology laboratory of Faculty of Agriculture, Islamic Azad University of Isfahan, in 2018. A factorial layout within completely randomized design with four replications was used. Treatments included plant organs extract (leaf, stem, root and total plant), and different tobacco extract densities includes four levels of 0%, 25%, 50% and 100%. Control treatment (0% of tobacco extract) had obtained the highest value of germination rate, germination percentage, coleoptile weight, radicle weight, radicle length and coleoptile length. The maximum germination rate, germination percentage, coleoptiles weight, radicle weight, radicle length and coleoptiles length was related to extract of stem extract which had meaningful differences with other treatments. Both radicle and coleoptile length decreased with increase in concentration of tobacco extract. Tobacco extract has negatively effects on corn seeds by decreasing the germination rate. Tobacco may increase the presence of secondary metabolites, such as alkaloids, all of which may have different effects on seed germination percentage. The highest germination percentage (91.91%), coleoptile weight (0.046 mg), radicle weight (0.0161 mg), radicle length (7.24 mm), and coleoptiles length (6.45 mm) was related to interaction between control treatment (0% of extract) and stem extract. It is concluded that the extract of Nicotiana tabacum had both inhibitory and stimulatory effects on seedling growth of Zea mays.

Allelopathic Potential of Nicotiana glauca Aqueous Extract on Seed Germination and Seedlings of Acacia gerrardii

“…The allelochemical compounds weaken or inhibit seed endosperm, decreasing or stopping plant germination entirely [38,42]. Our results are in accordance with those of [43], which reported that Nicotiana tabacum L. extracts negatively affected corn seeds by decreasing the germination rate. The tobacco plant contains secondary metabolites, such as alkaloids and phenols, and all have different effects on the seed germination percentage.…”

“…Also, the hypocotyl vigor index was decreased by the concentration increase. According to [43], the root aqueous extracts of invasive N. glauca inhibited corn (Zea mays L.) growth. However, their leaches from the vegetative part inhibited the development of different plants such as L. sativa [44].…”

Traditional Herbal Medicine for the Prevention and Treatment of Cold and Flu in the Autumn of 2020, Overlapped With COVID-19

“…[9][10][11][12] Their important roles in public health and wellness have led many people of different nationalities to rely on traditional herbal remedies, including TCM and traditional Persian medicine. [13][14][15][16][17] Asia, especially China and Iran, are reservoirs of various high-valued medicinal plants, which have been used in the cosmetic, nutraceutical, and pharmaceutical industries. [18][19][20][21][22] Chinese and other Asian herbal medicines focus on prevention more than treatment.…”