Coordinated effects of lead toxicity and nutrient deprivation on growth, oxidative status, and elemental composition of primed and non-primed rice seedlings.

Environmental Science and Pollution Research International
Fahad KhanMingjian Geng

Abstract

Rice crop is highly susceptible to the toxic levels of lead (Pb) during early growth stages. Moreover, a sufficient availability of mineral nutrients is critical for survival of plants particularly under stressful conditions. An experiment was carried out to unravel the coordinated effects of Pb stress (1-mM PbCl2) and different nutrient treatments (sufficient nutrient supply, nitrogen (N) deprivation, phosphorus (P) deprivation, and potassium (K) deprivation) on morphological growth, reactive oxygen species (ROS), antioxidants, and nutrient status in primed and non-primed rice seedlings. Seeding were primed with distilled water, 60-μM selenium, or 100-mg L-1 salicylic acid. Results indicated that Pb toxicity did not affect the root growth, but severely reduced the shoot growth (length and biomass) of rice in N- or P-deprived seedlings. Rice seedlings grown with sufficient supply of nutrients or K-deprivation showed no growth reduction under Pb toxicity. Exposure of Pb stress triggered the production of ROS (H2O2, O2˙-, OH-) and lipid peroxidation rate particularly under N- or P-deprivation. Moreover, the shoot accumulations of macronutrients (P in particular) were also restricted under Pb toxicity. Seed priming treatments effe...Continue Reading

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Citations

Sep 7, 2018·Environmental Science and Pollution Research International·Sadiq NaveedSaddam Hussain
Jun 7, 2019·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Sameer Suresh BhagyawantNidhi Srivastava
Feb 27, 2021·Frontiers in Plant Science·Muhammad AslamRafaqat Ali Gill

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