Zn alleviated salt toxicity in Solanum lycopersicum L. seedlings by reducing Na+ transfer, improving gas exchange, defense system and Zn contents

Ali, Muhammad Ubaid; Parveen, Aasma; Malik, Zaffar; Kamran, Muhammad; Saleem, Muhammad Hamzah; Abbasi, Ghulam Hassan; Ahmad, Ijaz; Ahmad, Sahrim; Sathish, Manda; Okla, Mohammad K.; Al-amri, Saud S.; Alaraidh, Ibrahim A.; Ali, Shafaqat

doi:10.1016/j.plaphy.2022.06.028

Cited by 12 publications

(9 citation statements)

References 64 publications

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“…Our results indicated that higher concentrations of Zn and Ni inhibited seed germination. Previous studies have also documented a detrimental effect of Zn on plant growth parameters, which is in agreement with the findings of Saleem et al [ 48 ], who demonstrated that cadmium stress can cause chlorosis and variability in the lipid membrane thus preventing plant growth. Similar reports were found in the present study in which the application of R P improved the germination percentage in the presence of Zn.…”

Section: Discussionsupporting

confidence: 91%

Combined effect of endophytic Bacillus mycoides and rock phosphate on the amelioration of heavy metal stress in wheat plants

Shahzad,

Aslam,

Ferdous

et al. 2024

BMC Plant Biol

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Background Zinc (Zn) and nickel (Ni) are nutrients that are crucial for plant growth; however, when they are present at higher concentrations, they can cause toxicity in plants. The present study aimed to isolate plant growth promoting endophytic bacteria from Viburnum grandiflorum and assess its plant and defense promoting potential alone and in combination with RP in zinc (Zn) and nickel (Ni) toxic soil. The isolated endophytic bacteria were identified using 16s rRNA gene sequencing. For the experiment, twelve different treatments were applied using Zn, Ni, isolated endophytic Bacillus mycoides (Accession # MW979613), and rock phosphate (RP). The Ni, Zn and RP were used at the rate of (100 mg/kg) and (0.2 g/kg) respectively. A pot experiment with three replicates of each treatment was conducted using a complete randomized design (CRD). Results The results indicated that Ni (T5 = seed + 100 mg/kg Ni and T9 = seed + 100 mg/kg Zn) and Zn concentrations inhibited plant growth, but the intensity of growth inhibition was higher in Ni-contaminated soil. Bacillus mycoides and RP at 100 mg/Kg Zn (T12 = inoculated seed + 100 mg/kg Zn + RP0.2 g/kg.) increased the shoot length, leaf width, protein and sugar content by 57%, 13%, 20% and 34%, respectively, compared to the control. The antioxidant enzymes superoxide dismutases (SOD), peroxidase (POD) were decreased in contaminated soil. Furthermore, Ni and Zn accumulation was inhibited in T11 (seed + 100 mg/kg Zn + RP0.2 g/Kg) and T12 (inoculated seed + 100 mg/kg Zn + RP0.2 g/Kg) by 62 and 63% respectively. The Cu, Ca, and K, contents increased by 128, 219 and 85, Mn, Na, and K by 326, 449, and 84% in (T3 = inoculated seed) and (T4 = inoculated seed + RP 0.2 g/Kg) respectively. Conclusions Ni was more toxic to plants than Zn, but endophytic bacteria isolated from Viburnum grandiflorum, helped wheat (Triticum aestivum) plants and reduced the toxic effects of Ni and Zn. The effect of Bacillus mycoides was more prominent in combination with RP which promoted and suppressed heavy-metal toxicity. The reported combination of Bacillus mycoides and RP may be useful for improving plant growth and overcoming metal stress.

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Section: Discussionsupporting

confidence: 91%

Combined effect of endophytic Bacillus mycoides and rock phosphate on the amelioration of heavy metal stress in wheat plants

Shahzad,

Aslam,

Ferdous

et al. 2024

BMC Plant Biol

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“…Sulfhydryl groups in membrane proteins can be affected by excessive Cu 2+ stress, resulting in the deformations of cell membranes ( Emamverdian et al., 2015 ). The only way for organisms to survive deleterious oxidative stress is through evolving an effective and efficient system of antioxidants, e.g., superoxide dismutase (SOD), catalase (CAT), peroxidases (POD), proline, carotenoids, glutathione (GSH) and ascorbic acid (AsA) ( Das and Roychoudhury, 2014 ; Hasan et al., 2018 ; Ali et al., 2022 ). For optimal growth, it is essential to coordinate antioxidants (enzymatic and non-enzymatic) to maintain ROS levels at stable levels, especially under metal contaminations ( Noctor et al., 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of nano-silicon on the regulation of ascorbate-glutathione contents, antioxidant defense system and growth of copper stressed wheat (Triticum aestivum L.) seedlings

et al. 2022

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Copper (Cu2+) toxicity can inhibit plant growth and development. It has been shown that silicon (Si) can relieve Cu2+ stress. However, it is unclear how Si-nanoparticles (SiNPs) relieve Cu2+ stress in wheat seedlings. Therefore, the current study was conducted by setting up four treatments: CK, SiNP: (2.5 mM), Cu2+: (500 µM), and SiNP+Cu2+: (2.5 mM SiNP+500 µM Cu2+) to explore whether SiNPs can alleviate Cu2+ toxicity in wheat seedlings. The results showed that Cu2+ stress hampered root and shoot growth and accumulated high Cu2+ concentrations in roots (45.35 mg/kg) and shoots (25.70 mg/kg) of wheat as compared to control treatment. Moreover, Cu2+ treatment inhibited photosynthetic traits and chlorophyll contents as well as disturbed the antioxidant defense system by accumulating malondialdehyde (MDA) and hydrogen peroxidase (H2O2) contents. However, SiNPs treatment increased root length and shoot height by 15.1% and 22%, respectively, under Cu2+ toxicity. Moreover, SiNPs application decreased MDA and H2O2 contents by 31.25% and 19.25%, respectively. SiNPs increased non-enzymatic compounds such as ascorbic acid-glutathione (AsA-GSH) and enhanced superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbic peroxidase (APX) activities by 77.5%, 141.7%, 68%, and 80%, respectively. Furthermore, SiNPs decreased Cu2+ concentrations in shoots by 26.2%, as compared to Cu2+ treatment alone. The results concluded that SiNPs could alleviate Cu2+ stress in wheat seedlings. The present investigation may help to increase wheat production in Cu2+ contaminated soils.

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“…Various studies have highlighted the role of Zn 2+ in ameliorating the effects of injury caused by Na + . It has been shown that Zn is capable of altering the accumulation of solutes, improving water relations, increasing the expression of salinity resistance genes, and scavenging ROS (Ali et al, 2022;Fatemi et al, 2020;Ouni et al, 2016;Xu et al, 2014), although these studies were performed using considerably lower concentrations of Zn than in our experiments. In addition, a mechanism could be acting to reduce the transport of Zn and Na from the roots to the aboveground parts when a severe excess of ionic imbalance is detected, and preliminary studies point in that direction (nonpublished results).…”

Section: Combination Of Salinity and Zn Stressesmentioning

confidence: 90%

The differential expressions of aquaporins underline the diverse strategies of cucumber and tomato against salinity and zinc stress

Martinez‐Alonso,

Nicolás‐Espinosa,

Carvajal

et al. 2024

Physiologia Plantarum

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Salinity and excess zinc are two main problems that have limited agriculture in recent years. Aquaporins are crucial in regulating the passage of water and solutes through cells and may be essential for mitigating abiotic stresses. In the present study, the adaptive response to moderate salinity (60 mM NaCl) and excess Zn (1 mM ZnSO4) were compared alone and in combination in Cucumis sativus L. and Solanum lycopersicum L. Water relations, gas exchange and the differential expression of all aquaporins were analysed. The results showed that cucumber plants under salinity maintained the internal movement of water through osmotic adjustment and the overexpression of specific PIPs aquaporins, following a “conservation strategy”. As tomato has a high tolerance to salinity, the physiological parameters and the expression of most aquaporins remained unchanged. ZnSO4 was shown to be stressful for both plant species. While cucumber upregulated 7 aquaporin isoforms, the expression of aquaporins increased in a generalized manner in tomato. Despite the differences, water relations and transpiration were adjusted in both plants, allowing the RWC in the shoot to be maintained. The aquaporin regulation in cucumber plants facing NaCl+ZnSO4 stress was similar in the two treatments containing NaCl, evidencing the predominance of salt in stress. However, in tomato, the induced expression of specific isoforms to deal with the combined stress differed from independent stresses. The results clarify the key role of aquaporin regulation in facing abiotic stresses and their possible use as markers of tolerance to salinity and heavy metals in plants.

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Zn alleviated salt toxicity in Solanum lycopersicum L. seedlings by reducing Na+ transfer, improving gas exchange, defense system and Zn contents

Cited by 12 publications

References 64 publications

Combined effect of endophytic Bacillus mycoides and rock phosphate on the amelioration of heavy metal stress in wheat plants

Combined effect of endophytic Bacillus mycoides and rock phosphate on the amelioration of heavy metal stress in wheat plants

Effect of nano-silicon on the regulation of ascorbate-glutathione contents, antioxidant defense system and growth of copper stressed wheat (Triticum aestivum L.) seedlings

The differential expressions of aquaporins underline the diverse strategies of cucumber and tomato against salinity and zinc stress

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