Mechanical wounding of leaf midrib and lamina elicits differential biochemical response and mitigates salinity induced damage in tomato

Sabina, S.; Jithesh, M. N.

doi:10.37855/jah.2021.v23i01.01

Cited by 6 publications

(6 citation statements)

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“…Further, it was also shown that MS treatment through rubbing increased stem resistance to tensile forces. The mean tensile strength resulted in a significant increase of 113% in rubbed plants, when compared to plants that were not treated [63]. It was also shown that calcium induced changes brought about by rubbing was thought to elicit downstream changes in gene expression and that, the Ca ++ effect is modulated by calmodulin [64].…”

Section: Mechanical Conditioning Methods For Stem Length Reductionmentioning

confidence: 99%

“…Alleviation of salt stress was higher in mid rib cuts than in lamina was confirmed through the stabilization of relative water content and also, an increase in antioxidant scavenging activity. Therefore, the defense response was stronger in plants with plants with leaf midrib injury than in those with laminar injury [63]. However, these experiments were done by methods that lead to discernible injury in the plant.…”

Section: Mechanical Conditioning and Cross Tolerance To Salinitymentioning

confidence: 99%

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Improving Tomato Productivity for Changing Climatic and Environmental Stress Conditions

Narayanan¹,

Viswanathan²,

Ramanujam³

et al. 2024

Tomato Cultivation and Consumption - Innovation and Sustainability

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Tomato (Lycopersicon esculentum Mill.) growth, cultivation and its productivity are adversely influenced by severe environmental pressures. Several environmental abiotic factors that are limited not only to drought, salinity, temperature and heat but also to mechanical stress affect tomato yield and productivity. Salinity is a persistent problem throughout the world that affects soil properties. Further, tomato productivity due to salinity stress is affected at all stages of plant development. Seed priming, a method to alleviate salinity stress is an effective technique that can improve performance and growth. It is a method that permits controlled hydration of seeds thereby, maintaining metabolic activity, without allowing the protrusion of the radicle. Mechanical conditioning, a term applied to plant stimulation by tactile stimuli through various methods like touching, brushing, or rubbing the plant material, is another environmentally friendly and simple method to regulate plant growth and also stress tolerance. Therefore, the mechanical conditioning practice primes plants for enhanced plant growth and also allows plants to defend against an impending stress factor. These two methods can be developed into successful production practices. In this chapter, we summarize current knowledge of seed priming and mechanical conditioning for plant growth, cross-tolerance and plant productivity improvement.

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Section: Mechanical Conditioning Methods For Stem Length Reductionmentioning

confidence: 99%

Section: Mechanical Conditioning and Cross Tolerance To Salinitymentioning

confidence: 99%

Improving Tomato Productivity for Changing Climatic and Environmental Stress Conditions

Narayanan¹,

Viswanathan²,

Ramanujam³

et al. 2024

Tomato Cultivation and Consumption - Innovation and Sustainability

View full text Add to dashboard Cite

show abstract

“…According to reports, a plant wound is a critical feature of moisture stress; thus, combining moisture stress and mechanical wounding increases ROS levels (Becerra-Moreno et al, 2015;Gao and Farmer, 2023). Sabina and Jithesh (2021) observed during the quantitative analysis of H2O2 levels that types of mechanical wounding caused a quick response, reaching the highest level at 4 hours of stress, followed by a reduction in H2O2 after 24 and 48 hours, respectively. It shows that mechanical wounding contributes to water deficit stress.…”

Section: Multi-abiotic Stress Factors Affecting Horticultural Plants ...mentioning

confidence: 99%

“…Plants with midrib and lamina injury demonstrated a substantial increase in 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) scavenging rate compared to the control plants. Plant leaves with midrib injury produced higher levels of DPPH scavenging rate by 46.6% at 48 hours compared with leaf lamina injury and control (Sabina and Jithesh, 2021). DPPH scavenging rate is measured to study the antioxidant activity of plant extracts.…”

Section: The Extent Of Wounding As a Potential Stress Factormentioning

confidence: 99%

Phytohormone-Based Biostimulants as an Alternative Mitigating Strategy for Horticultural Plants Grown Under Adverse Multi-Stress Conditions: Common South African Stress Factors

Khetsha,

Van der Watt,

Masowa

et al. 2024

Caraka Tani J. Sustain. Agric.

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Worldwide, it has been recorded extensively that plants are subjected to severe abiotic and biotic stressors. The scientific research community has widely reported that multi-abiotic stressors cause horticultural crop losses, accounting for at least 50 to 70% of the crop yield and quality losses. Therefore, this review focused on the detrimental effects caused by abiotic stress factors occurring in single-, combined- and multi-cell stresses on horticultural plants worldwide, along with the best production systems practices for mitigation during and post-single and combined abiotic or multi-stress damages. A conclusion and recommendation could be reached using the pool of research material, which constituted research articles, reviews, book chapters, thesis, research short communications and industrial short communications from at least twenty-five years ago. Findings showed that some of the leading abiotic stresses are single- and combined abiotic stressors like water deficit, salinity, soil pH, phosphate deficiency, wounding, soil density and pot size. Established commercial and smallholder farmers are globally adapting to plant growth regulators and biostimulants as part of their production systems. However, as much as the effectiveness of biostimulants containing humic acids, algal extracts, plant growth-promoting microorganisms and phytohormones has been reported to promote plant development under multi-stress, only a few studies are focusing on organic phytohormone-based biostimulants on horticultural crops grown under adverse multi stress factoring. In conclusion, the review recommends alternative solutions for emerging South African farmers and growers who cannot afford agricultural insurance options and energy alternatives on the common single- and combined abiotic- or multi-stress-factors.

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“…H 2 O 2 accumulation has been reported in salt-stressed maize and tomato plants at 24 and 48 hours post-salt application (Forieri, Hildebrandt and Rostas, 2016;Tandra et al , 2022). A study reported that ROS accumulation under salt stress primed a JA-mediated anti-insect herbivory defense response (Sabina and Jithesh, 2021). As salt stress and herbivory co-occur, plant responses to one stress will have implications for cross-tolerance to another (Capiati, Pais and Tellez-Inon, 2006;Fujita et al , 2006).…”

Section: Introductionmentioning

confidence: 99%

Tomato Defenses Under Stress: The Impact of Salinity on Direct Defenses Against Insect Herbivores

Pawar,

Paranjape,

Kalowsky

et al. 2024

Preprint

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Plant responses to multifactorial stress combinations are seldom studied, but combinations of abiotic and biotic stresses may cause drastic yield reductions in crops. While an abiotic stress, the salinization of agricultural soil, affects crop production, added pressures of insect herbivores could lead to further losses. In this paper, we investigate the effects of salinity on an insect herbivore, the corn earworm caterpillar ( Helicoverpa zea), feeding on tomato ( Solanum lycopersicum cv. Better Boy) plants. We show that salt-stressed tomato plants are poor hosts for H. zea, impacting caterpillar growth rates, caterpillar feeding preference, and moth oviposition. We further show that these observations are best explained by reductions in both relative leaf water content and leaf total protein content, along with ionic toxicity and imbalance. We observe that salt stress does not influence anti-insect herbivory defense protein (PPO and TPI) levels. Finally, we observe that salt treatment leads to differences in specific volatiles, with lower emissions of 2-carene, α-phellandrene, β-phellandrene, α-humulene, and β-caryophyllene in salt-treated plants. We demonstrate that salt exposure changes tomato plant quality and chemical composition, which in turn negatively affects insect herbivores feeding on these plants.

show abstract

Mechanical wounding of leaf midrib and lamina elicits differential biochemical response and mitigates salinity induced damage in tomato

Cited by 6 publications

References 0 publications

Improving Tomato Productivity for Changing Climatic and Environmental Stress Conditions

Improving Tomato Productivity for Changing Climatic and Environmental Stress Conditions

Phytohormone-Based Biostimulants as an Alternative Mitigating Strategy for Horticultural Plants Grown Under Adverse Multi-Stress Conditions: Common South African Stress Factors

Tomato Defenses Under Stress: The Impact of Salinity on Direct Defenses Against Insect Herbivores

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