Pre-exposure of calli to ozone promotes tolerance of regenerated Lycopersicon esculentum cv. PKM1 plantlets against acute ozone stress

Nagendra-Prasad, D.; Sudhakar, N.; Murugesan, K. Sakthi; Mohan, N.

doi:10.1016/j.jplph.2007.10.003

Cited by 10 publications

(2 citation statements)

References 52 publications

(65 reference statements)

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“…then they were placed on callus inducing ms medium [25]. media were supplemented with Gamborg B5 vitamins [13], 30 g l -1 sucrose, 8 g l -1 agar, 5 μM α-naphthyl acetic acid (NAA) in combination with 8.8 μM 6-benzyladenine (Ba) [26]. the ph of the culture medium was adjusted to 5.8 with 0.1 n KOh and the cultures were incubated at 25 °c in darkness.…”

Section: Establishment Of Suspension Culturesmentioning

confidence: 99%

Opposite extremes in ethylene/nitric oxide ratio induce cell death in suspension culture and root apices of tomato exposed to salt stress

Poór¹,

Borbély²,

Kovács³

et al. 2014

Acta Biologica Hungarica

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The plant hormone ethylene or the gaseous signalling molecule nitric oxide (NO) may enhance salt stress tolerance by maintaining ion homeostasis, first of all K+/Na+ ratio of tissues. Ethylene and NO accumulation increased in the root apices and suspension culture cells of tomato at sublethal salt stress caused by 100 mM NaCl, however, the induction phase of programmed cell death (PCD) was different at lethal salt concentration. The production of ethylene by root apices and the accumulation of NO in the cells of suspension culture did not increase during the initiation of PCD after 250 mM NaCl treatment. Moreover, cells in suspension culture accumulated higher amount of reactive oxygen species which, along with NO deficiency contributed to cell death induction. The absence of ethylene in the apical root segments and the absence of NO accumulation in the cell suspension resulted in similar ion disequilibrium, namely K+/Na+ ratio of 1.41 ± 0.1 and 1.68 ± 0.3 in intact plant tissues and suspension culture cells, respectively that was not tolerated by tomato.

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Section: Establishment Of Suspension Culturesmentioning

confidence: 99%

Opposite extremes in ethylene/nitric oxide ratio induce cell death in suspension culture and root apices of tomato exposed to salt stress

Poór¹,

Borbély²,

Kovács³

et al. 2014

Acta Biologica Hungarica

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“…Plants primarily deal with O 3 stress via an endogenous defensive mechanism consisting of different antioxidant compounds that are able to scavenge free radicals [30]. Thus, O 3 could be a beneficial tool for enhancing tolerance to various abiotic stresses without any environmental problems [31]. A detailed literature survey showed that various researchers have evaluated the harmful effect of high O 3 concentrations on plants.…”

Section: Introductionmentioning

confidence: 99%

Influence of Seed Soaking and Foliar Application Using Ozonated Water on Two Sweet Pepper Hybrids under Cold Stress

Sharaf-Eldin

Alshallash²,

Alharbi³

et al. 2022

Sustainability

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The harmful impacts of ozone (O3) on plant development and productivity have been excessively studied. Furthermore, the positive influences of its low concentrations still need to be explored further. The present study was performed to assess the impact of low concentrations of O3 on two sweet pepper hybrids under cold stress. The ozonated water was utilized for seed soaking or foliar application at concentrations of 0, 10, 20, 30, and 40 ppm. Seed soaking using ozonated water for 1 h was compared to soaking in distilled water as a control. Moreover, exogenously ozonated water was sprayed thrice at three-day intervals compared with untreated control. The differences between the applied methods (seed soaking and foliar application using ozonated water) were not statistically detected in most of the evaluated parameters. On the other hand, the evaluated hybrids displayed significant differences in the studied parameters, with the superiority of the Lirica evident in most germination and seedling growth parameters. Both applied methods significantly improved germination and seedling growth parameters. In particular, the concentration of 40 ppm displayed the highest enhancement of the germination index, coefficient velocity, and seedling quality. In addition, it promoted the seedling maintenance of high relative water content (RWC), chlorophyll, proline, and ascorbate peroxidase activity under cold stress conditions. Moreover, it protected the cell wall from damage by decreasing membrane permeability (MP). Generally, the best results were obtained from 40 ppm followed by 30 ppm of O3 as seed soaking or foliar spray. The results pointed out the possible use of O3 in a low concentration to protect the plants from cold stress during germination and early plant growth.

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Individual Effects of High Temperature and Tropospheric Ozone on Tomato: A Review

Gupta

Yadav

Agrawal

et al. 2022

J Plant Growth Regul

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Pre-exposure of calli to ozone promotes tolerance of regenerated Lycopersicon esculentum cv. PKM1 plantlets against acute ozone stress

Cited by 10 publications

References 52 publications

Opposite extremes in ethylene/nitric oxide ratio induce cell death in suspension culture and root apices of tomato exposed to salt stress

Opposite extremes in ethylene/nitric oxide ratio induce cell death in suspension culture and root apices of tomato exposed to salt stress

Influence of Seed Soaking and Foliar Application Using Ozonated Water on Two Sweet Pepper Hybrids under Cold Stress

Individual Effects of High Temperature and Tropospheric Ozone on Tomato: A Review

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