Abstract
Lead (Pb) is a ubiquitous non-biodegradable heavy metal pollutant. It has an inhibitory effect on the growth and nutrient accumulation of mungbean. Flavonoid exposure has been reported to alleviate Pb toxicity in many plants. However, there is no report documenting the effect of naringenin on mungbean in presence of Pb. The current study addresses the novel aspect of naringenin towards mungbean protein digestibility and solubility. Exogenous application of naringenin on Pb stressed mungbean showed alleviation of Pb induced morphological and biochemical alterations. Naringenin exposure enhanced the non-enzymatic antioxidant potential of mungbean as a result of more accumulation of polyphenolics and flavonoids. However, the enzymatic antioxidant potential system of the mungbean was reduced as naringenin itself has high free radical scavenging potential. Further, the protein accumulation along with protein bioavailability was also enhanced on naringenin exposure. The most significant alleviation responses were observed at 1 mM naringenin. Thus in the present scenario of concomitant stress inductions mimicking global climate change, treatment of seeds with phytochemicals like naringenin possesses the potential to impart heavy metal stress tolerance to legumes including mungbean.
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