Yield and aroma stability under drought in indigenous aromatic rice cultivars (IARCs), which needs significant attenuation of reduction of grain yield and quality through redox metabolic reprograming in contributory flag leaf was rarely studied and hence was the subject of present investigation. The redox landscaping of flag leaves of experimental IARCs done (Oryza sativa L., Cultivars Tulaipanji, Badshabhog, Jamainadu, and Sitabhog) during ensuing drought stress at grain-filling stage (65% of field capacity) and stress withdrawal (after 6 days) revealed tilt in the magnitude of redox homeostasis (assessed in terms of oxidation of DCFDA, accumulation of O₂^⋅−, H₂O_2, free radical scavenging property, non-protein thiol compounds, redox osmolytes, antioxidant pigments, and ROS-antioxidant interaction index), efficacy of RboH- ascorbate–glutathione/catalase pathway and sensitive biomarkers oxidative stress (accumulation of free carbonyl compounds, hydroperoxide, conjugated diene, and thiobarbituric acid reactive substances). The Cultivars capable of regulating ROS-antioxidant interaction dynamics at metabolic interface in flag leaf (Badshabhog and Tulaipanji) and able to prevent oxidative deterioration of flag leaf caused better restoration of aroma profile, 2-acetyl-1-pyrroline (2AP) content, agronomic characters, seed yield, and kernel quality than the others (Jamainadu and Sitabhog). Further, germplasm specific comparative assessment of metabolites shared by redox osmolyte proline and (2AP), exhibited metabolic cross talking toward regulation of dehydration induced oxidative stress and restoration of aroma production. Ability of maintenance of aromatic compounds, agronomic characters, seed yield, and kernel quality under drought stress through redox-regulatory acclimatory events of flag leaves in IARCs is suggested.

本土香稻品种 (IARC) 在干旱条件下的产量和香气稳定性需要通过贡献旗叶中的氧化还原代谢重编程来显着减弱谷物产量和品质的下降，但很少有研究，因此是目前调查的主题。在随后的灌浆期干旱胁迫（田间持水量的 65%）和胁迫撤消（6 天后）期间，实验性 IARCs（Oryza sativa L.、Cultivars Tulaipanji、Badshabhog、Jamainadu 和 Sitabhog）旗叶的氧化还原景观美化显示氧化还原稳态幅度的倾斜（根据 DCFDA 的氧化、O ₂ ^⋅−的积累、H ₂ O _2、自由基清除特性、非蛋白质硫醇化合物、氧化还原渗透物、抗氧化色素和 ROS-抗氧化相互作用指数）、RboH-抗坏血酸-谷胱甘肽/过氧化氢酶途径的功效和敏感生物标志物氧化应激（游离羰基化合物的积累、氢过氧化物、共轭二烯和硫代巴比妥酸反应物质）。能够调节旗叶（Badshabhog 和 Tulaipanji）代谢界面 ROS-抗氧化相互作用动力学并能够防止旗叶氧化变质的品种能够更好地恢复香气特征、2-乙酰基-1-吡咯啉 (2AP) 含量、农艺学性状、种子产量和籽粒质量优于其他（Jamainadu 和 Sitabhog）。此外，氧化还原渗透物脯氨酸和 (2AP) 共有的代谢物的种质特异性比较评估，表现出代谢交叉调节脱水引起的氧化应激和恢复香气产生。提出了通过 IARC 中旗叶的氧化还原调节驯化事件在干旱胁迫下维持芳香化合物、农艺性状、种子产量和籽粒品质的能力。