PJB-2022-78
Magnesium and nitrogen co-doped carbon dots alleviate UV-B radiation damage in wheat seedlings
Ting Mu and Rong Han
Abstract
Ultraviolet B radiation (UV-B) has a negative effect on crops seedling vigor and germination. Magnesium and nitrogen co-doped carbon dots (Mg-N-CDs) are the major molecules participated in various physiological events of seedlings. The effects of various concentrations of exogenous Mg-N-CDs on the wheat seed germination together with the features of early seedling growth under a stress of UV-B were studied. The UV-B stress (10.08 KJ m-2 d-1) significantly suppressed the germination index, seed germination potential, the growth of germs and roots and vigor index. The pretreatment of Mg-N-CDs attenuated the effect of UV-B stress with a dose-dependent mode, as exhibited by increasing the features of early seedling growth parameters and seed germination, the mitigation effect of 0.04 mg ml-1 Mg-N-CDs was the most significant. Mg-N-CDs pretreatment activated the effective antioxidant systems and then effectively enhanced the peroxidase (POD), catalase (CAT) and superoxide dismutase (SOD) activities in roots and germs, so as to prevent the oxidative damage caused by UV-B stress. In addition, Mg-N-CDs pre-treatment significantly increased the increase the expression of other related genes to improve the antioxidant capacity of roots and germs, leading to the up-regulated ATPS, CS, and GS level. The results demonstrated that applying Mg-N-CDs to the wheat seeds probably is an excellent choice. It can enhance the seed germination together with seedling growth under a stress of UV-B by regulating physiological response, so as to improve the seed germination along with seedling growth
To Cite this article:
Mu, T. and R. Han. 2024. Magnesium and nitrogen co-doped carbon dots alleviate UV-B radiation damage in wheat seedlings. Pak. J. Bot., 56(1): DOI: http://dx.doi.org/10.30848/PJB2024-1(33)
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