Growth and quality parameters of Tea (Camellia sinensis) mediated by arbuscular mycorrhizal fungi

Abstract

Arbuscular mycorrhizal fungi (AMF) inoculation not only increases the growth but also improves the quality of many commercial plants. Tea (Camellia sinensis) plants were grown on different growth medium (with and without AMF inoculation) and the chemical properties of the leaves were assayed and compared. The growth media were sterilized soil with AMF, sterilized soil, natural soil inoculated with AMF, natural soil, and natural soil in natural condition with AMF. The highest root colonization (23 %) was found in tea plants grown on natural soil with AMF, whereas no colonization was found in the sterilized soil treatment. The highest level of leaf chlorophyll-a (2.74±0.06 μg.mL-1), chlorophyll-b (1.77±0.03 μg.mL-1) and carotenoid (0.35±0.01 μg.mL-1) contents were found in tea plants grown on natural soil under natural condition with AMF. The highest polyphenol concentration (64.46 mg.L-1) was found in natural soil inoculated with AMF whereas the lowest (38.09 mg.L-1) was recorded in sterilized soil. The highest contents of tannin (30.34 mg.mL-1) and reducing sugar (46.61 mg.L-1) were recorded in plants grown on natural soil under natural condition with AMF and the lowest values (21.22 mg.mL-1, 33.16 mg.L-1, respectively) in sterilized soil treatment. Though antioxidant properties (% scavenging effect) did not differed due to treatments, the highest IAA (Indole-3-acetic acid) concentration (3.16 μg.mL-1) was recorded in tea plants grown on natural soil under natural condition with AMF. The study concludes that AMF inoculation improves the quality of tea leaves.

Antimicrobial activity of peels and physicochemical properties of juice prepared from indigenous citrus fruits of Sylhet region, Bangladesh

“…Citrus peel oils also have potent antioxidant and antibacterial properties ( Raspo et al., 2020 ). Antioxidant compounds derived from natural sources, including fruits, rice, olive seeds, beans, spices, and vegetables, have been studied ( Hossain et al., 2020b ; Sarkar et al., 2020a , Sarkar et al., 2020b ). Many of these bioactive components are present in many plants, including pulses, wood, bark, stem, leaf, fruit, root, herb, and seed ( Roy et al., 2021 ; Sarkar et al., 2020a , Sarkar et al., 2020b ; Zzaman et al., 2021 ).…”

Evaluation of quality parameters and antioxidant properties of protein concentrates and hydrolysates of hyacinth bean (Lablab purpureus)

“…This need has prompted interest in discovering additional natural antioxidant substances are growing tremendously worldwide. Natural antioxidants like ascorbic acid (AA), vitamin A, herbal extracts, and tea extracts are widely being utilized as sources of antioxidants in food systems (Sarkar, Rahman, et al, 2020; Shahidi, 2000). Recently, some research has shown that protein hydrolysates from various sources, including plant‐based products, have the potentiality to exhibit antioxidant activities against the lipid oxidation (Peña‐Ramos et al, 2004).…”