水素水施用がカドミウム・鉛ストレス下における香り米の初期生育および生理生化学的機能に与える影響
This study examined how hydrogen-rich water (HRW, 500 ppb H2) affects early seedling development and physiological responses in two fragrant rice cultivars (Yuxiangyouzhan and Xiangyaxiangzhan) exposed to cadmium (Cd, 75 µmol/L) or lead (Pb, 750 µmol/L). Growth parameters were measured at 5 and 10 days after treatment. HRW application increased shoot, root, and whole-seedling dry biomass at 10 days. Under Pb stress, both fresh and dry weights of roots and whole seedlings improved substantially at both time points. Cd-induced root inhibition was partially relieved by HRW at 10 days. Antioxidant enzyme activities—catalase (CAT) and peroxidase (POD)—were elevated following HRW application, while root Pb and Cd accumulation declined in both cultivars. These findings indicate that HRW mitigates heavy-metal-induced growth suppression by enhancing antioxidant defense mechanisms in rice seedlings.
HRW application elevated catalase and peroxidase activities, reinforcing antioxidant defenses and reducing oxidative damage caused by Cd and Pb. This was accompanied by decreased heavy metal accumulation in root tissues of rice seedlings.
Hydrogen-rich water is a low-risk delivery route, but the achievable systemic hydrogen dose is bounded. For clinical applications, inhalation is the most efficient route; inhalation, however, carries explosion risk, and concentration matters (empirical LFL of 10% applies to inhalation environments; high-concentration devices are documented in the Consumer Affairs Agency accident database and are not recommended).
See also:
https://h2-papers.org/en/papers/34114146