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Host plant growth promotion and cadmium detoxification in Solanum nigrum, mediated by endophytic fungi.
Ecotoxicol Environ Saf. 2017 Feb; 136:180-188.EE

Abstract

Current investigation conducted to evaluate the associated fungal endophyte interactions of a Cd hyper-accumulator Solanum nigrum Korean ecotype under varying concentrations of Cd. Two indole-3-acetic acid (IAA) producing fungal strains, RSF-4L and RSF-6L, isolated from the leaves of S. nigrum, were initially screened for Cd tolerance and accumulation potential. In terms of dry biomass production, the strain RSF-6L showed higher tolerance and accumulation capacity for Cd toxicity in comparison to RSF-4L. Therefore, RSF-6L was applied in vivo to S. nigrum and grown for six weeks under Cd concentrations of 0, 10, and 30mgKg-1 of dry sand. The effect of fungal inoculation assessed by plant physiological responses, endogenous biochemical regulations, and Cd profile in different tissues. Significant increase were observed in plant growth attributes such as shoot length, root length, dry biomass, leaf area, and chlorophyll contents in inoculated RSF-6L plants in comparison to non-inoculated plants with or without Cd contamination. RSF-6L inoculation decreased uptake of Cd in roots and above ground parts, as evidenced by a low bio-concentration factor (BCF) and improved tolerance index (TI). However, Cd concentration in the leaves remained the same for inoculated and non-inoculated plants under Cd spiking. Fungal inoculation protected the host plants, as evidenced by low peroxidase (POD) and polyphenol peroxidase (PPO) activities and high catalase (CAT) activity. Application of appropriate fungal inoculation that can improve tolerance mechanisms of hyper-accumulators and reduce Cd uptake can be recommended for phyto-stabilisation/immobilisation of heavy metals in crop fields.

Authors+Show Affiliations

School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea; Institute of Biotechnology and Genetic Engineering, The University of Agriculture, Peshawar, Pakistan.School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.UoN Chair of Oman's Medicinal Plants & Marine Natural Products, University of Nizwa, 616 Nizwa, Oman.School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.Department of Botany, University of Peshawar, Peshawar, Pakistan.School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.Department of Plant Sciences, Kohat University of Science and Technology (KUST), Kohat 26000, Pakistan.School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea. Electronic address: jhshin@knu.ac.kr.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27931714

Citation

Khan, Abdur Rahim, et al. "Host Plant Growth Promotion and Cadmium Detoxification in Solanum Nigrum, Mediated By Endophytic Fungi." Ecotoxicology and Environmental Safety, vol. 136, 2017, pp. 180-188.
Khan AR, Ullah I, Waqas M, et al. Host plant growth promotion and cadmium detoxification in Solanum nigrum, mediated by endophytic fungi. Ecotoxicol Environ Saf. 2017;136:180-188.
Khan, A. R., Ullah, I., Waqas, M., Park, G. S., Khan, A. L., Hong, S. J., Ullah, R., Jung, B. K., Park, C. E., Ur-Rehman, S., Lee, I. J., & Shin, J. H. (2017). Host plant growth promotion and cadmium detoxification in Solanum nigrum, mediated by endophytic fungi. Ecotoxicology and Environmental Safety, 136, 180-188. https://doi.org/10.1016/j.ecoenv.2016.03.014
Khan AR, et al. Host Plant Growth Promotion and Cadmium Detoxification in Solanum Nigrum, Mediated By Endophytic Fungi. Ecotoxicol Environ Saf. 2017;136:180-188. PubMed PMID: 27931714.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Host plant growth promotion and cadmium detoxification in Solanum nigrum, mediated by endophytic fungi. AU - Khan,Abdur Rahim, AU - Ullah,Ihsan, AU - Waqas,Muhammad, AU - Park,Gun-Seok, AU - Khan,Abdul Latif, AU - Hong,Sung-Jun, AU - Ullah,Rehman, AU - Jung,Byung Kwon, AU - Park,Chang Eon, AU - Ur-Rehman,Shafiq, AU - Lee,In-Jung, AU - Shin,Jae-Ho, PY - 2015/10/20/received PY - 2016/03/04/revised PY - 2016/03/08/accepted PY - 2016/12/10/entrez PY - 2016/12/10/pubmed PY - 2017/1/20/medline KW - Cd-hyperaccumulator KW - Endophytic fungi KW - Phytoremediation KW - Solanum nigrum SP - 180 EP - 188 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 136 N2 - Current investigation conducted to evaluate the associated fungal endophyte interactions of a Cd hyper-accumulator Solanum nigrum Korean ecotype under varying concentrations of Cd. Two indole-3-acetic acid (IAA) producing fungal strains, RSF-4L and RSF-6L, isolated from the leaves of S. nigrum, were initially screened for Cd tolerance and accumulation potential. In terms of dry biomass production, the strain RSF-6L showed higher tolerance and accumulation capacity for Cd toxicity in comparison to RSF-4L. Therefore, RSF-6L was applied in vivo to S. nigrum and grown for six weeks under Cd concentrations of 0, 10, and 30mgKg-1 of dry sand. The effect of fungal inoculation assessed by plant physiological responses, endogenous biochemical regulations, and Cd profile in different tissues. Significant increase were observed in plant growth attributes such as shoot length, root length, dry biomass, leaf area, and chlorophyll contents in inoculated RSF-6L plants in comparison to non-inoculated plants with or without Cd contamination. RSF-6L inoculation decreased uptake of Cd in roots and above ground parts, as evidenced by a low bio-concentration factor (BCF) and improved tolerance index (TI). However, Cd concentration in the leaves remained the same for inoculated and non-inoculated plants under Cd spiking. Fungal inoculation protected the host plants, as evidenced by low peroxidase (POD) and polyphenol peroxidase (PPO) activities and high catalase (CAT) activity. Application of appropriate fungal inoculation that can improve tolerance mechanisms of hyper-accumulators and reduce Cd uptake can be recommended for phyto-stabilisation/immobilisation of heavy metals in crop fields. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/27931714/Host_plant_growth_promotion_and_cadmium_detoxification_in_Solanum_nigrum_mediated_by_endophytic_fungi_ DB - PRIME DP - Unbound Medicine ER -