Seed soaking with melatonin promotes seed germination under chromium stress via enhancing reserve mobilization and antioxidant metabolism in wheat

Lei, Kangqi; Sun, Shuzhen; Zhong, Kaitai; Li, Shiyu; Hu, Hang; Sun, Chuanjiao; Zheng, Qiaomei; Tian, Zhigang; Dai, Tingbo; Sun, Jianyun

doi:10.1016/j.ecoenv.2021.112241

Cited by 64 publications

(62 citation statements)

References 52 publications

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“…Subsequently, some studies also reported that enhanced soluble sugars were detected after the treatment of melatonin [ 43 ]. Others demonstrated that accumulated osmolytes caused osmotic stress under abiotic stress, which was related to the redox homeostasis by exogenous melatonin [ 44 , 45 ]. The current results were aligned with the latter studies, showing decreased accumulation of SS and proline after the MT treatment under severe drought stress ( Figure S4 ).…”

Section: Discussionmentioning

confidence: 99%

“…The current results were aligned with the latter studies, showing decreased accumulation of SS and proline after the MT treatment under severe drought stress ( Figure S4 ). Lei et al [ 44 ] proposed that such MT-alleviated effects were not associated with osmotic adjustment. Besides, another possible explanation was that the disruption of ROS homeostasis under severe drought stress caused depressed functioning of cell metabolism.…”

Section: Discussionmentioning

confidence: 99%

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Melatonin Promotes SGT1-Involved Signals to Ameliorate Drought Stress Adaption in Rice

Yang

Wenyin

et al. 2022

IJMS

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Drought has become one of the environmental threats to agriculture and food security. Applications of melatonin (MT) serve as an effective way to alleviate drought stress, but the underlying mechanism remains poorly understood. Here, we found that foliar spray of 100-µM MT greatly mitigated the severe drought stress-induced damages in rice seedlings, including improved survival rates, enhanced antioxidant system, and adjusted osmotic balance. However, mutation of the suppressor of the G2 allele of skp1 (OsSGT1) and ABSCISIC ACID INSENSITIVE 5 (OsABI5) abolished the effects of MT. Furthermore, the upregulated expression of OsABI5 was detected in wild type (WT) under drought stress, irrespective of MT treatment, whereas OsABI5 was significantly downregulated in sgt1 and sgt1abi5 mutants. In contrast, no change of the OsSGT1 expression level was detected in abi5. Moreover, mutation of OsSGT1 and OsABI5 significantly suppressed the expression of genes associated with the antioxidant system. These results suggested that the functions of OsSGT1 in the MT-mediated alleviation of drought stress were associated with the ABI5-mediated signals. Collectively, we demonstrated that OsSGT1 was involved in the drought response of rice and that melatonin promoted SGT1-involved signals to ameliorate drought stress adaption.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Melatonin Promotes SGT1-Involved Signals to Ameliorate Drought Stress Adaption in Rice

Yang

Wenyin

et al. 2022

IJMS

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“…Moreover, Cr toxicity also induces cellular oxidative stress by triggering the accumulation of reactive oxygen species (ROS), which leads to the necrosis of plants. Several studies have reported that the accumulation of Cr in plants causes severe damage to crop production by increasing toxicity and inhibiting plant growth [12][13][14]. This growth retardation could be linked to the huge disturbance in cellular homeostasis and sub-cellular organelle damage [15,16].…”

Section: Introductionmentioning

confidence: 99%

Seed Priming with Brassinosteroids Alleviates Chromium Stress in Rice Cultivars via Improving ROS Metabolism and Antioxidant Defense Response at Biochemical and Molecular Levels

et al. 2021

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This research was performed to explore the vital role of seed priming with a 0.01 µM concentration of brassinosteroids (EBL) to alleviate the adverse effects of Cr (100 µM) in two different rice cultivars. Seed priming with EBL significantly enhanced the germination attributes (germination percentage, germination energy, germination index, and vigor index, etc.), photosynthetic rate as well as plant growth (shoot and root length including the fresh and dry weight) under Cr toxicity as compared to the plants primed with water. Cr toxicity induced antioxidant enzyme activities (SOD, POD, CAT, and APX) and ROS level (MDA and H2O2 contents) in both rice cultivars; however, a larger increment was observed in YLY-689 (tolerant) than CY-927 (sensitive) cultivar. EBL application stimulatingly increased antioxidant enzyme activities to scavenge ROS production under Cr stress. The gene expression of SOD and POD in EBL-primed rice plants followed a similar increasing trend as observed in the case of enzymatic activities of SOD and POD compared to water-primed rice plants. Simultaneously, Cr uptake was observed to be significantly higher in the water-primed control compared to plants primed with EBL. Moreover, Cr uptake was significant in YLY-689 compared to CY-927. In ultra-structure studies, it was observed that EBL priming relieved the rice plants from sub-cellular damage. Conclusively, our research indicated that seed priming with EBL could be adopted as a promising strategy to enhance rice growth by copping the venomous effect of Cr.

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“…Previous studies found that soaking seeds with melatonin (100 μM) could have the potential to protect wheat seeds from chromium toxicity. It effectively improved the germination under chromium stress by enhancing the reserve mobilization and antioxidant metabolism of wheat [ 19 ]. The results in our experiment indicate that melatonin increases the germination rate of seeds and promotes the subsequent growth in a concentration-dependent manner, but this effect is offset at high concentrations.…”

Section: Discussionmentioning

confidence: 99%

“…Melatonin has a dose-dependent effect. The optimal concentration of melatonin has been different in different plant species and plays an important role in resisting environmental stress [ 19 ]. In response to the oxidative stress caused by adverse environments, taller plants have formed a set of antioxidant enzyme systems, including SOD, POD, and CAT [ 21 ].…”

Section: Discussionmentioning

confidence: 99%

Exogenous Melatonin Activates Antioxidant Systems to Increase the Ability of Rice Seeds to Germinate under High Temperature Conditions

Deng

Zhou

et al. 2022

Plants

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High temperatures are a major concern that limit rice germination and plant growth. Although previous studies found that melatonin can promote seed germination, the physiological regulation mechanism by which exogenous melatonin mediates high temperature tolerance during rice seed germination is still largely unknown. In order to overcome these challenges, the present study investigates the effects of melatonin on the characteristics of rice seed germination as well as on antioxidant properties, under different high temperature conditions. The results show that 100 μM melatonin seed-soaking treatment under high temperature conditions effectively improves the germination potential, the germination index, and the vigor index of rice seeds; increases the length of the shoot and the root; improves the activity of the antioxidant enzymes; and significantly reduces the malondialdehyde content. The gray relational grade of the shoot peroxidase activity and the melatonin soaking treatment was the highest, which was used to evaluate the effect of melatonin on the heat tolerance of rice. The subordinate function method was used to comprehensively evaluate the tolerance, and the results show that the critical concentration of melatonin is 100 μM, and the critical interactive treatment is the germination at 38 °C and followed by the recovery at 26 °C for 1 day + 100 μM. In conclusion, 100 μM of melatonin concentration improved the heat resistance of rice seeds by enhancing the activity of the antioxidant enzymes.

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Seed soaking with melatonin promotes seed germination under chromium stress via enhancing reserve mobilization and antioxidant metabolism in wheat

Cited by 64 publications

References 52 publications

Melatonin Promotes SGT1-Involved Signals to Ameliorate Drought Stress Adaption in Rice

Melatonin Promotes SGT1-Involved Signals to Ameliorate Drought Stress Adaption in Rice

Seed Priming with Brassinosteroids Alleviates Chromium Stress in Rice Cultivars via Improving ROS Metabolism and Antioxidant Defense Response at Biochemical and Molecular Levels

Exogenous Melatonin Activates Antioxidant Systems to Increase the Ability of Rice Seeds to Germinate under High Temperature Conditions

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