Environmental stresses generate reactive oxygen species (ROS) which might be detrimental to the plants when produced in an uncontrolled way. However, the plants ameliorate such stresses by synthesizing antioxidants and enzymes responsible for the dismutation of ROS. Additionally, the dehydrins were also able to protect the inactivation of the enzyme lactate dehydrogenase against hydroxyl radicals (OH⋅) generated during Fenton’s reaction. SbDhn1 and SbDhn2 overexpressing transgenic tobacco plants were able to protect against oxidative damage. Transgenic tobacco lines showed better photosynthetic efficiency along with high chlorophyll content, soluble sugar and proline. However, the malonyl dialdehyde (MDA) content was significantly lower in transgenic lines. Experimental evidence demonstrates the protective effect of dehydrins on electron transport chain in isolated chloroplast upon methyl viologen (MV) treatment. The transgenic tobacco plants showed significantly lower superoxide radical generation () upon MV treatment. The accumulation of the H2O2 was also lower in the transgenic plants. Furthermore, in the transgenic plants the expression of ROS scavenging enzymes was higher compared to non-transformed (NT) or vector transformed (VT) plants. Taken together these data, during oxidative stress dehydrins function by scavenging the () directly and also by rendering protection to the enzymes responsible for the dismutation of () thereby significantly reducing the amount of hydrogen peroxides formed. Increase in proline content along with other antioxidants might also play a significant role in stress amelioration. Dehydrins thus function co-operatively with other protective mechanisms under oxidative stress conditions rendering protection in stress environment.

During the COVID-19 pandemic, Canada has witnessed a sharp increase in racial violence against Chinese Canadians, and, in an undifferentiated racism, other Asian Canadians have been seen as bearers of disease as well, which often made them targets of racism. The quick transformation of Asian minority groups into threats of contagion during the pandemic points to the persistence of latent fears and anxieties about Chinese Canadians across generational differences, immigration status, and national origin. This essay reflects on how knowledges about early Chinese newcomers that were generated by colonial administrators laid the foundations for modes of racial governance that continue to inform public policy and public discourse in multicultural Canada in ways at once familiar and new. It examines the 1885 Report of the Royal Commission on Chinese Immigration as an important tool in reinforcing the political goal of “white Canada” by strengthening the power of European colonists. Less than a century later, in 1967, the immigration points system was introduced, preceding the adoption of multiculturalism policy in 1971, both breaking with explicitly racist national policies. Yet there is more continuity than there are differences across the 1885 Report and the 1967 immigration policy. Both participate in a historical narrative that excludes the Chinese from national imagining, laying fertile ground for contemporary anti-Chinese racisms during the recent COVID-19 pandemic. Contemporary media narratives during the pandemic reproduce the same racial hierarchies, excluding Chinese Canadians from the nation. By placing the rise in anti-Asian racism during the COVID-19 pandemic in the long historical trajectory of institutional racism in Canada, this essay argues for the need to learn about the historical legacies of racism to be able to intervene in structural racism so that Canada’s promise of multiculturalism can be grounded in justice and equity.

Plants use a diverse set of proteins to mitigate various abiotic stresses. The intrinsically disordered protein dehydrin is an important member of this repertoire of proteins, characterized by a canonical amphipathic K-segment. It can also contain other stress-mitigating noncanonical segments—a likely reflection of the extremely diverse nature of abiotic stress encountered by plants. Among plants, the poikilohydric mosses have no inbuilt mechanism to prevent desiccation and therefore are likely to contain unique noncanonical stress-responsive motifs in their dehydrins. Here we report the recurring occurrence of a novel amphipathic helix-forming segment (D-segment: EGφφD(R/K)AKDAφ, where φ represents a hydrophobic residue) in Physcomitrella patens dehydrin (PpDHNA), a poikilohydric moss. NMR and CD spectroscopic experiments demonstrated the helix-forming tendency of the D-segment, with the shuffled D-segment as control. PpDHNA activity was shown to be size as well as D-segment dependent from in vitro , in vivo , and in planta studies using PpDHNA and various deletion mutants. Bimolecular fluorescence complementation studies showed that D-segment-mediated PpDHNA self-association is a requirement for stress abatement. The D-segment was also found to occur in two rehydrin proteins from Syntrichia ruralis , another poikilohydric plant like P. patens . Multiple occurrences of the D-segment in poikilohydric plant dehydrins/rehydrins, along with the experimental demonstration of the role of D-segment in stress abatement, implies that the D-segment mediates unique resurrection strategies, which may be employed by plant dehydrins that are capable of mitigating extreme stress.

The present paper is an endeavour to get in the brutal social practices against scheduled caste (SC) women in India utilizing state-level information over the period of nearly two decades, that is, 2001–2019. Besides law enforcement and punishment, there can be other compelling instruments for controlling rape against SC women. The result proposes interstate disparity in rape rate. Rape against SC women may be controlled with higher economic growth, education and expanding expenditure on police. The DEMARU states are still found slacking behind in controlling rape of SC women.

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