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Role of Amf on Plant Growth, Nutrient Uptake Arsenic Toxicity and Chlorophyll Content of Chili Grown in Arsenic Amended Soil

F. E. Elahi
Scientific Officer
Plant Pathology Division, Bangladesh Agricultural Research Institute, Gazipur.

M. A. U. Mridha
Professor
Plant Production Department, King Saud University, Kingdom of Saudi Arabia

F. M. Aminuzzaman
Assistant Professor
Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Abstract/ Executive Summary:

Mycorrhizal fungi have their most significant effect on plant growth and have shown to reduce arsenic contamination to chili. The present experiment was carried out to determine the influence of AMF inoculation on plant growth, nutrient uptake, arsenic toxicity, and chlorophyll content of chili grown in arsenic amended soil. Chili was grown in arsenic amended soils with or without mycorrhizal inoculation. Three levels of arsenic concentrations (10 ppm, 100 ppm, and 500 ppm) were used. The seed germination was affected more by the two treatment variables. Root length, shoot height, root fresh weight, shoot fresh weight, root dry weight, shoot dry weight were higher in AMF inoculated plants in comparison to their respective treatments and decreased significantly with the increase rate of arsenic concentrations. Less arsenic content, higher chlorophyll, and nutrient uptake were recorded in mycorrhiza inoculated chili plants. The present findings indicated that AMP inoculation not only minimize arsenic toxicity, but also can increase growth and nutrient uptake of chili.

Keywords: Mycorrhizal fungi, Arsenic contamination, Chili.

Location: Agronomy field of Sher-e-Bangla Agricultural University

Start Date: 00-02-2008

End Date: 00-00-2008

Program Area: Risk Management in Agriculture

Commodity: Fertilizer

Objectives:

To assess the role of AMF on plant growth and nutrient uptake by chili and /or the interaction of arsenic and mycorrhiza on different physical and chemical growth parameters of chili plants.

Methodology:

A survey was conducted in the agronomy field of Sher-e-Bangla Agricultural University in February 2008 to collect natural inoculum of mycorrhiza. Many root samples of different plants were stained according to Koske and Gemma with some modifications. Among all the root samples, Leucas aspara showed the highest percentage of infection of mycorrhiza. For the preparation of 1000 ppm arsenic solution, 4 g sodium hydroxide, 1.32 g arsenic powder and 10% HCl were used. 10 ppm, 100 ppm and 500 ppm arsenic solution were prepared. 2 kg soil (in composition with 10 % sand and 90% soil) was sterilized with 0.05 % formaldehyde solution which was poured in poly bags mixing 25 g root inoculum and 100 g soil inoculum of mycorrhiza. Then arsenic solution of different concentrations (10 ppm, 100 ppm, and 500 ppm) was mixed with the poly bag soil and then the next day, chili seeds were sown in poly bags. The experiment was conducted following CRD with seven treatments (T_I= Control, T₂ = 10 ppm arsenic solution, T₃ = 10 ppm arsenic solution + mycorrhiza, T₄ = 100 ppm arsenic solution, T₅ = 100 ppm arsenic solution+ mycorrhiza, T₆ = 500 ppm arsenic solution, T₇ = 500 ppm arsenic solution + mycorrhiza), and 5 replications. Data were recorded on seedling emergence (%) (7 DAS, 10 DAS, and 15 DAS), shoot fresh and dry weight (g) (30 DAS, 45 DAS, and 60 DAS), root fresh and dry weight (g) (30 DAS, 45 DAS, and 60 DAS), shoot and root length (cm) (30 DAS, 45 DAs, and 60 DAS). Chemical analyses were done for the determination of P, K, S, N, and As by using Spectrophotometer, Flame photometer, micro-Kjeldahl method, and Hybrid Generation Atomic Absorption Spectrophotometer.

Source of Information: Bangladesh J. Agril. Res. 37(4): 635-644, December 2012, (ISSN 0258-7122)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Mycorrhizal technology would be least expensive, simple, and nature farming technology. Increased crop production and decreased arsenic toxicity of chili has particularly importance for human health and suggests that mycorrhizal inoculation may contribute to minimize arsenic through consumption of chili grown in arsenic contaminated areas of Bangladesh.

Knowledge Management: Journal