Scholarlink

Background <p>Arsenic (As) contamination is a pressing global challenge that substantially restricts crop productivity and growth due to its increasing prevalence in agricultural soils. Allantoin, a well-characterized plant metabolite, has not been thoroughly explored for its role in mitigating As-induced oxidative stress. This research explored the protective effects of foliar-applied allantoin in rice (<i>Oryza sativa</i> L. cv. BRRI dhan75) exposed to sodium arsenate (0.25 mM). At 10 days after transplanting plants subjected to As, with two allantoin doses (0.5 and 1.0 mM) applied as foliar sprays at 5-day intervals.</p> Results <p>Arsenic stress significantly inhibited growth, leaf expansion, chlorophyll content and water balance which reduced biomass accumulation, while elevating oxidative damage through higher hydrogen peroxide accumulation, lipid peroxidation, proline overproduction, electrolyte leakage, and suppression of glyoxalase and antioxidant enzyme activities. Conversely, allantoin application markedly alleviated these detrimental effects by improving photosynthetic performance, water status, and redox homeostasis through increased levels of ascorbate and glutathione. Moreover, allantoin activated key antioxidants and glyoxalase enzymes, including glutathione reductase, glutathione peroxidase, catalase, peroxidase, ascorbate peroxidase, monodehydroascorbate reductase, glutathione <i>S</i>-transferases, dehydroascorbate reductase, and glyoxalases.</p> Conclusions <p>These results highlight that allantoin reinforces reactive oxygen species scavenging and antioxidant defense machinery, thereby conferring resilience to As toxicity in rice.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Foliar application of allantoin reinforces antioxidant defense and glyoxalase systems to confer tolerance against arsenic toxicity in rice (Oryza sativa L.)

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月27日

查看全文
  • Mirza Hasanuzzaman,
  • Samiul Alam,
  • Abida Sultana,
  • Umme Kulsum Sabiha,
  • Md. Mahabub Alam,
  • P.V. Vara Prasad

摘要

Background

Arsenic (As) contamination is a pressing global challenge that substantially restricts crop productivity and growth due to its increasing prevalence in agricultural soils. Allantoin, a well-characterized plant metabolite, has not been thoroughly explored for its role in mitigating As-induced oxidative stress. This research explored the protective effects of foliar-applied allantoin in rice (Oryza sativa L. cv. BRRI dhan75) exposed to sodium arsenate (0.25 mM). At 10 days after transplanting plants subjected to As, with two allantoin doses (0.5 and 1.0 mM) applied as foliar sprays at 5-day intervals.

Results

Arsenic stress significantly inhibited growth, leaf expansion, chlorophyll content and water balance which reduced biomass accumulation, while elevating oxidative damage through higher hydrogen peroxide accumulation, lipid peroxidation, proline overproduction, electrolyte leakage, and suppression of glyoxalase and antioxidant enzyme activities. Conversely, allantoin application markedly alleviated these detrimental effects by improving photosynthetic performance, water status, and redox homeostasis through increased levels of ascorbate and glutathione. Moreover, allantoin activated key antioxidants and glyoxalase enzymes, including glutathione reductase, glutathione peroxidase, catalase, peroxidase, ascorbate peroxidase, monodehydroascorbate reductase, glutathione S-transferases, dehydroascorbate reductase, and glyoxalases.

Conclusions

These results highlight that allantoin reinforces reactive oxygen species scavenging and antioxidant defense machinery, thereby conferring resilience to As toxicity in rice.