Nitric oxide acts as a signal molecule in microwave pretreatment induced cadmium tolerance in wheat seedlings

Qiu, Zongbo; Guo, Junli; Zhang, Manman; Lei, Mengyun; Li, Zhenlin

doi:10.1007/s11738-012-1048-1

Cited by 27 publications

(16 citation statements)

References 42 publications

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“…Similar responses in terms of NO changes were also observed in Cd-exposed Medicago roots [15] and confirm unequivocal action of the given compounds despite various species and applied concentrations. Impact of SNP and PTIO on Cd-induced changes observed here is in accordance with data from various species and indicates similar action despite different applied concentrations: SNP ameliorates negative Cd influence but (c)PTIO reverses this action in terms of oxidative stress-related parameters [15], [20], [21]. Our present data are in agreement with mentioned studies and confirm our earlier study where PTIO induced increase in ROS in Cu-exposed chamomile roots [6].…”

Section: Resultssupporting

confidence: 93%

Unexpected Behavior of Some Nitric Oxide Modulators under Cadmium Excess in Plant Tissue

et al. 2014

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Various nitric oxide modulators (NO donors - SNP, GSNO, DEA NONOate and scavengers – PTIO, cPTIO) were tested to highlight the role of NO under Cd excess in various ontogenetic stages of chamomile (Matricaria chamomilla). Surprisingly, compared to Cd alone, SNP and PTIO elevated Cd uptake (confirmed also by PhenGreen staining) but depleted glutathione (partially ascorbic acid) and phytochelatins PC2 and PC3 in both older plants (cultured hydroponically) and seedlings (cultured in deionised water). Despite these anomalous impacts, fluorescence staining of NO and ROS confirmed predictable assumptions and revealed reciprocal changes (decrease in NO but increase in ROS after PTIO addition and the opposite after SNP application). Subsequent tests using alternative modulators and seedlings confirmed changes to NO and ROS after application of GSNO and DEA NONOate as mentioned above for SNP while cPTIO altered only NO level (depletion). On the contrary to SNP and PTIO, GSNO, DEA NONOate and cPTIO did not elevate Cd content and phytochelatins (PC2, PC3) were rather elevated. These data provide evidence that various NO modulators are useful in terms of NO and ROS manipulation but interactions with intact plants affect metal uptake and must therefore be used with caution. In this view, cPTIO and DEA NONOate revealed the less pronounced side impacts and are recommended as suitable NO scavenger/donor in plant physiological studies under Cd excess.

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Section: Resultssupporting

confidence: 93%

Unexpected Behavior of Some Nitric Oxide Modulators under Cadmium Excess in Plant Tissue

et al. 2014

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“…It was suggested that the protective effect of NO could consist of stimulation of SOD activity to counteract the overproduction of superoxide radicals, thus preventing the formation of peroxynitrite from NO and O 2 − . Similar properties of NO were also found in plants under aluminum, cadmium and copper stress Singh et al 2008;Li et al 2012;Qiu et al 2013). On the other hand, Cassia tora plants pretreated for 12 h with 0.4 mM SNP and then treated with 10 mM aluminum for 24 h showed significantly greater root elongation and decrease in accumulation of aluminum in root apexes compared to control plants (Wang and Yang 2005).…”

Section: Heavy Metalssupporting

confidence: 71%

Nitric Oxide: Role in Plants Under Abiotic Stress

Bajguz

2013

Physiological Mechanisms and Adaptation Strategies in Plants Under Changing Environment

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“…These results are in accordance with our previous study in which we demonstrated that NO counteracted Cd-induced decrease in the activities of antioxidant enzymes. Qiu et al (2013) have also reported that NO upregulated the components of the antioxidant defense machinery activities of SOD, POD, and CAT. Improved activities of SOD, POD, and CAT in Cd-stressed peanut plants prevented lipid peroxidation and MDA production, and thus the plant cells were protected from Cd stress damage.…”

Section: Discussionmentioning

confidence: 91%

Effects of the application of exogenous NO at different growth stage on the physiological characteristics of peanut grown in Cd-contaminated soil

Dong

Zhang

et al. 2013

Journal of Plant Interactions

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A pot experiment was conducted to study the effects of sodium nitroprusside (SNP, a nitric oxide [NO] donor) on cadmium (Cd) toxicity in peanut plants. SNP solution was poured into Cd-contaminated soil at sowing, seedling, flowering, and pod setting stages, respectively. The results showed that exogenous NO increased the biomass and yield of peanuts and improved chlorophyll content, photosynthesis (P n ), and transpiration (T r ). Cd-induced oxidative damages were eliminated by exogenous NO, reflected by decreased accumulation of superoxide anion (O À 2 ), hydrogen peroxide (H 2 O 2 ), and malondialdehyde (MDA). Moreover, exogenous NO increased Cd-decreased activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and soluble protein and proline contents also reached a normal level. Furthermore, exogenous NO improved the uptake of nutrient elements and reduced Cd accumulation in the roots, shoots, and kernels under Cd stress. These data suggest that SNP application at sowing and seedling stages had better alleviation effects on Cd toxicity in peanut plants.

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Nitric oxide acts as a signal molecule in microwave pretreatment induced cadmium tolerance in wheat seedlings

Cited by 27 publications

References 42 publications

Unexpected Behavior of Some Nitric Oxide Modulators under Cadmium Excess in Plant Tissue

Unexpected Behavior of Some Nitric Oxide Modulators under Cadmium Excess in Plant Tissue

Nitric Oxide: Role in Plants Under Abiotic Stress

Effects of the application of exogenous NO at different growth stage on the physiological characteristics of peanut grown in Cd-contaminated soil

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