Introduction: Today, the growing rate of soil contamination is a major environmental concern. The cohabitation between microorganisms and plants hasbeen in place for millions of years, and investigationsin this regardhave become an important research area. Methods: The preset study aimed to assessthe effects of variousconcentrations of lead (0, 50, and 100 mg/l) and Trichodermaharzianumfungus (5%, 10% and 15%) on cauliflowerin a factorial design using fully randomized blocks in three replications under the climatic conditions of Dehlamavillage in Shahroud, Iran.The research was conducted during2014-2015 to measure the levels of chlorophyll a, chlorophyll b, totalchlorophyll, carotenoid, phenols, and flavonoids, as well as the antioxidant properties of cauliflower. Results: The results indicated that the highestlevels of chlorophyll a (75.723 mg/wet weight), chlorophyll b (27.378 mg/wet weight), and total chlorophyll (109.074 mg/wet weight) were associated with the interactive effects of the treatment with 5% Trichoderma and lead concentration of 0 mg/l. Furthermore, thehighest level of antioxidant properties (79.88% of free radicals) was associated with the interactive effects of lead at the concentration of 50 mg/l and treatment with 5% Trichoderma. The highest level of phenols (21.33 mg of Gaelic acid/dry weight) was associated with the interactive effects of the lead concentration of 100 mg/l and treatment with 5% Trichoderma and flavonoids(22.889 mg of quercetin/g/dry weight), as well as the interactive effects of the lead concentration of 50 mg/l and treatment with 5% Trichoderma. Conclusion: Since carotenoids are antioxidants and precursors of vitamin A, the desired levels of antioxidants were achieved with the parallel effect of other antioxidants, such as total phenols and flavonoids. |
- Alguacil, M., et al. (2003). "Antioxidant enzyme activities in shoots from three mycorrhizal shrub species afforested in a degraded semi‐arid soil." Physiologia Plantarum 118(4): 562-570.
- Alloway, B. J. (2013). Sources of heavy metals and metalloids in soils. Heavy metals in soils, Springer: 11-50.
- Almeida, A.-A. F. d., et al. (2007). "Tolerance and prospection of phytoremediator woody species of Cd, Pb, Cu and Cr." Brazilian Journal of Plant Physiology 19(2): 83-98.
- Alvarez, M. a. E., et al. (1998). "Reactive oxygen intermediates mediate a systemic signal network in the establishment of plant immunity." Cell 92(6): 773-784.
- Babula, D., et al. (2007). Brassica oleracea. Vegetables, Springer: 227-285.
- Bagheri, A. A., et al. (2013). "Effect of endophytic fungus, Piriformospora indica, on growth and activity of antioxidant enzymes of rice (Oryza sativa L.) under salinity stress." International Journal of Advanced Biological and Biomedical Research 1(11): 1337-1350.
- Baldi, A., et al. (2010). "Enhanced production of podophyllotoxins by co-culture of transformed Linum album cells with plant growth-promoting fungi." Pure and Applied Chemistry 82(1): 227-241.
- Brundrett, M. (2004). "Diversity and classification of mycorrhizal associations." Biological Reviews 79(3): 473-495.
- Bryla, D. and J. Duniway (1997). "Growth, phosphorus uptake, and water relations of safflower and wheat infected with an arbuscular mycorrhizal fungus." The New Phytologist 136(4): 581-590.
- Burges, A., et al. (2018). "From phytoremediation of soil contaminants to phytomanagement of ecosystem services in metal contaminated sites." International journal of phytoremediation 20(4): 384-397.
- Burton, G. W. (1989). "Antioxidant action of carotenoids." The Journal of Nutrition 119(1): 109-111.
- Chen, S., et al. (2013). "Arbuscular mycorrhizal fungi (AMF) increase growth and secondary metabolism in cucumber subjected to low temperature stress." Scientia Horticulturae 160: 222-229.
- DHINDSA, R. S., et al. (1981). "Leaf senescence: correlated with increased levels of membrane permeability and lipid peroxidation, and decreased levels of superoxide dismutase and catalase." Journal of Experimental botany 32(1): 93-101.
- Dixit, R., et al. (2015). "Bioremediation of heavy metals from soil and aquatic environment: an overview of principles and criteria of fundamental processes." Sustainability 7(2): 2189-2212.
- Druege, U., et al. (2007). "Piriformospora indica promotes adventitious root formation in cuttings." Scientia Horticulturae 112(4): 422-426.
- Fargasova, A. (2004). "Toxicity comparison of some possible toxic metals (Cd, Cu, Pb, Se, Zn) on young seedlings of Sinapis alba L." Plant Soil and Environment 50(1): 33-38.
- Fukumoto, L. and G. Mazza (2000). "Assessing antioxidant and prooxidant activities of phenolic compounds." Journal of agricultural and food chemistry 48(8): 3597-3604.
- Gardea-Torresdey, J. L., et al. (2005). "Phytoremediation of heavy metals and study of the metal coordination by X-ray absorption spectroscopy." Coordination chemistry reviews 249(17-18): 1797-1810.
- Hrastar, M. (2016). HASH (0xbd0cd850), HASH (0xbd16c690).
- Kadukova, J. and N. Kalogerakis (2007). "Lead accumulation from non-saline and saline environment by Tamarix smyrnensis Bunge." European Journal of Soil Biology 43(4): 216-223.
- Labana, K. and M. Gupta (1993). Importance and origin. Breeding Oilseed Brassicas, Springer: 1-7.
- Meng, L., et al. (2005). "Long-term application of organic manure and nitrogen fertilizer on N2O emissions, soil quality and crop production in a sandy loam soil." Soil Biology and Biochemistry 37(11): 2037-2045.
- Mercik, S. and W. Stêpieñ (2005). "The most important soil properties and yields of plants in 80 years of static fertilizing experiments in Skierniewice." Fragmenta Agronomica 22(1).
- Mishra, S., et al. (2006). "Lead detoxification by coontail (Ceratophyllum demersum L.) involves induction of phytochelatins and antioxidant system in response to its accumulation." Chemosphere 65(6): 1027-1039.
- NASIBI, F., et al. (2012). "THE EFFECTS OF SPERMIDIN AND METHYLENE BLUE PRETREATMENT ON SOME PHYSIOLOGICAL RESPONSES OF MATRICARIA RECUTITA PLANTS TO SALT STRESS.
- Sun, C., et al. (2010). "Piriformospora indica confers drought tolerance in Chinese cabbage leaves by stimulating antioxidant enzymes, the expression of drought-related genes and the plastid-localized CAS protein." Journal of plant physiology 167(12): 1009-1017.
- Suzuki, S., et al. (2003). "Indole-3-acetic acid production in Pseudomonas fluorescens HP72 and its association with suppression of creeping bentgrass brown patch." Current Microbiology 47(2): 0138-0143.
- Tripathi, S., et al. (2008). Mycorrhizal fungi and other root endophytes as biocontrol agents against root pathogens. Mycorrhiza, Springer: 281-306.
- Tsunoda, S. and S. Nishi (1968). Origin, differentiation and breeding of cultivated Brassica. Proc XII Int Congr Genet.
- Vlyssides, A., et al. (2002). "Electrochemical treatment in relation to pH of domestic wastewater using Ti/Pt electrodes." Journal of Hazardous Materials 95(1-2): 215-226.
- Waller, F., et al. (2005). "The endophytic fungus Piriformospora indica reprograms barley to salt-stress tolerance, disease resistance, and higher yield." Proceedings of the National Academy of Sciences 102(38): 13386-13391.
- Wright, I. J., et al. (2004). "The worldwide leaf economics spectrum." Nature 428(6985): 821.
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