Effect of salinity on physiological, biochemical and photostabilizing attributes of two genotypes of quinoa (Chenopodium quinoa Willd.) exposed to arsenic stress.

Autor: Parvez, Shumaila1 (AUTHOR), Abbas, Ghulam1 (AUTHOR) g.a92pk@gmail.com, Shahid, Muhammad1 (AUTHOR), Amjad, Muhammad1 (AUTHOR), Hussain, Munawar2 (AUTHOR), Asad, Saeed Ahmad3 (AUTHOR), Imran, Muhammad4 (AUTHOR), Naeem, Muhammad Asif1 (AUTHOR)
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Zdroj: Ecotoxicology & Environmental Safety. Jan2020, Vol. 187, pN.PAG-N.PAG. 1p.
Abstrakt: Soil salinity and arsenic (As) contamination are serious environmental problems. To investigate the effects of salinity on As uptake and physiological and biochemical attributes of quinoa (Chenopodium quinoa Willd.), a hydroponic experiment was performed. One-month old healthy plants of two quinoa genotypes; Vikinga and A7 were transplanted in plastic tubs containing half strength Hoagland's nutrient solution. Plants were exposed to different levels of As (0, 150 and 300 μM), salinity (0, 150 and 300 mM) and their combinations (150 μM As + 300 mM NaCl; 300 μM As + 300 mM NaCl) for five weeks. Results revealed that combined application of salinity and As caused more pronounced reduction in growth, chlorophyll contents and caused more oxidative damage in both quinoa genotypes. Under combined application of salinity and As, Na+ concentration was increased whereas As content was decreased in plant tissues. Quinoa genotype A7 was more tolerant than Vikinga against salinity, As and their combination perhaps because of less uptake of toxic ions and higher activities of antioxidant enzymes (SOD, CAT, POD). Bioconcentration factor (BCF), translocation factor (TF) and tolerance index (TI) indicated that genotype A7 can be successfully employed for phytostabilization of As contaminated saline soils. Image 1 • Effects of salinity on arsenic (As) uptake and biochemical attributes of quinoa genotypes; A7 and Vikinga were studied. • Joint application of As and salinity reduced As but increased Na uptake by plants. • Activities of antioxidant enzymes; SOD, CAT, POD were more pronounced in A7 genotype. • Quinoa genotype, A7 proved to be more tolerant to As and salinity compared with Vikinga. • A7 genotype was suitable for phytostabilization of As in contaminated saline soils. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE
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