Effects of high salinity on physiological and anatomical indices in the early stages of Populus euphratica growth

Rajput, Vishnu D.; Chen, Y.; Ayup, Mubarek

doi:10.1134/s1021443715020168

Cited by 59 publications

(32 citation statements)

References 26 publications

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“…The enhanced antioxidant enzyme activity in this study was probably due to the increase of ROS such as H 2 O 2 , as reported in studies with Corylus avellana cell suspension cultures treated with silver nano particles [31]. In a study on tomato seedlings, ZnO induced oxidative stress by promoting antioxidant enzyme activities, as salinity stress induces anti-oxidative activity [32,33]. Elevated concentrations of ZnO (10-2000 mg/L) induced an abnormal defense system against ROS in Fagopyrum esculentum [21].…”

Section: Discussionsupporting

confidence: 77%

Influence of nano‐zinc oxide on tropane alkaloid production, h6h gene transcription and antioxidant enzyme activity in Hyoscyamus reticulatus L. hairy roots

Asl

Hosseini

Sharafi

et al. 2018

Engineering in Life Sciences

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The use of nanotechnology and biotechnology to improve the production of plant bioactive compounds is growing. Hyoscyamus reticulatus L. is a major source of tropane alkaloids with a wide therapeutic use, including treatment of Parkinson's disease and to calm schizoid patients. In the present study, hairy roots were obtained from two‐week‐old cotyledon explants of H. reticulatus L. using the A7 strain of Agrobacterium rhizogenes. The effects of different concentrations of the signaling molecule nano‐zinc oxide (ZnO) (0, 50, 100 and 200 mg/L), with three exposure times (24, 48 and 72 h), on the growth rate, antioxidant enzyme activity, total phenol contents (TPC), tropane alkaloid contents and hyoscyamine‐6‐beta‐hydroxylase (h6h) gene expression levels were investigated. Growth curve analysis revealed a decrease in fresh and dry weight of ZnO‐treated hairy roots compared to the control. ANOVA results showed that the antioxidant activity of the enzymes catalase, guaiacol peroxidase and ascorbate peroxidase was significantly higher in the ZnO‐treated hairy roots than in the control, as was the TPC. The highest levels of hyoscyamine (37%) and scopolamine (37.63%) were obtained in hairy roots treated with 100 mg/L of ZnO after 48 and 72 h, respectively. Semi‐quantitative RT‐PCR analysis revealed the highest h6h gene expression was in hairy roots treated with 100 mg/L of ZnO after 24 h. It can be concluded that ZnO is as an effective elicitor of tropane alkaloids such as hyoscyamine and scopolamine due to its enhancing effect on expression levels of the biosynthetic h6h gene.

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Section: Discussionsupporting

confidence: 77%

Influence of nano‐zinc oxide on tropane alkaloid production, h6h gene transcription and antioxidant enzyme activity in Hyoscyamus reticulatus L. hairy roots

Asl

Hosseini

Sharafi

et al. 2018

Engineering in Life Sciences

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“…3 and 4). The restricted and delayed development of bud tissues due to salinity in transformation to mature state is in harmony with the effects of salinity on the production of cells in the meristematic regions and expansion of mature tissues (Rajput et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Partial repair of salinity-induced damage to sprouting sugarcane buds by proline and glycinebetaine pretreatment

et al. 2015

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Sugarcane shows reduced crop stand under relatively suboptimal conditions; the main reason for this is its sensitivity to ionic stress in the soil solution. This research was performed to explore some physiological and developmental changes in the immature sugarcane buds submitted to salt stress and possible role of glycinebetaine (GB) and proline (Pro) in mitigating the ion toxicity in a time course manner. Salinity stress reduced fresh and dry weight, induced the generation of hydrogen peroxide, increased tissue levels of Na(+) sand Cl(-), reduced K(+) and Ca(2+), and K(+):Na(+) and Ca(2+):Na(+) ratios, while increasing the osmolyte synthesis in expanding sugarcane buds. Salinity stress reduced and delayed the formation of new bud leaves and their expansion, which was mainly because of reduction in the number and area of mesophyll cells and poor development of vascular bundles. The pretreatment of bud chips with 20 mM each of GB and Pro decreased tissue levels of Na(+) and Cl(-), reduced the generation of H2O2, improved K(+) and Ca(2+), K(+):Na(+) and Ca(2+):Na(+) ratios, and further increased the levels of GB, free proline (FP), and soluble sugars in the buds. The pretreatment increased mesophyll cell number and expansion of bud leaves and formation of elaborated vascular tissues, which apparently enabled the sprouting buds to adapt to salinity stress. Of the two osmolytes, GB was a relatively better inducer of salinity tolerance than Pro. In short, salinity-induced oxidative stress was the main cause for altered tissue development, the production of which was offset by pretreatment of bud tissues with Pro and GB.

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“…In the chloroplasts of the leaf parenchyma, the size of starch grains and plastoglobules increased significantly; the area of the thylakoids decreased, and inter-thylakoid space expanded (Rajput et al 2018d). These changes can be indicative of lowering the photosynthetic processes with relation to CuO-NPs toxicity (Rajput et al 2015).…”

Section: Effects On Cellular Ultrastructurementioning

confidence: 99%

“…The NPs could enhance ROS generation in plants, and cause oxidative stress, protein oxidation, lipid peroxidation, DNA damage and finally cell death (Ahmed et al 2018b;Mosa et al 2018). To avoid oxidative stress, plants activate a defence mechanism involving the anti-oxidative enzymes (Rajput et al 2015).…”

Section: Effects On Plants Ros and Anti-oxidative Activitiesmentioning

confidence: 99%

Interaction of Copper-Based Nanoparticles to Soil, Terrestrial, and Aquatic Systems: Critical Review of the State of the Science and Future Perspectives

Rajput

Minkina

Ahmed

et al. 2019

Reviews of Environmental Contamination and Toxicology

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Effects of high salinity on physiological and anatomical indices in the early stages of Populus euphratica growth

Cited by 59 publications

References 26 publications

Influence of nano‐zinc oxide on tropane alkaloid production, h6h gene transcription and antioxidant enzyme activity in Hyoscyamus reticulatus L. hairy roots

Influence of nano‐zinc oxide on tropane alkaloid production, h6h gene transcription and antioxidant enzyme activity in Hyoscyamus reticulatus L. hairy roots

Partial repair of salinity-induced damage to sprouting sugarcane buds by proline and glycinebetaine pretreatment

Interaction of Copper-Based Nanoparticles to Soil, Terrestrial, and Aquatic Systems: Critical Review of the State of the Science and Future Perspectives

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