scholarly journals Effect of Some Integrated Pest Management Elements on the Population Density of Bemisia Tabaci (Gennadius) (Hemiptera: Aleyrodidae) on Tomato Plants (Solanum Lycopersicum L.)

2021 ◽  
Vol 42 (1) ◽  
pp. 57-68
Author(s):  
Adnan Darwish ◽  
Mohammed M. R. Attia ◽  
Alaa M. H. Khozimy
Keyword(s):  
Population Density ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Solanum Lycopersicum ◽  
Bemisia Tabaci ◽  
Tomato Plants ◽  
Solanum Lycopersicum L

scholarly journals Comparative Physiological and Biochemical Changes in Tomato (Solanum lycopersicum L.) Under Salt Stress and Recovery: Role of Antioxidant Defense and Glyoxalase Systems

Antioxidants ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 350 ◽  
Author(s):  
Parvin ◽  
Hasanuzzaman ◽  
Bhuyan ◽  
Nahar ◽  
Mohsin ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Plant Growth ◽  
Solanum Lycopersicum ◽  
Nutrient Solution ◽  
Stress Responses ◽  
Antioxidant Defense ◽  
Oxygen Species ◽  
Tomato Plants ◽  
Solanum Lycopersicum L ◽  
Post Stress

Salinity toxicity and the post-stress restorative process were examined to identify the salt tolerance mechanism in tomato, with a focus on the antioxidant defense and glyoxalase systems. Hydroponically grown 15 day-old tomato plants (Solanum lycopersicum L. cv. Pusa Ruby) were treated with 150 and 250 mM NaCl for 4 days and subsequently grown in nutrient solution for a further 2 days to observe the post-stress responses. Under saline conditions, plants showed osmotic stress responses that included low leaf relative water content and high proline content. Salinity induced oxidative stress by the over-accumulation of reactive oxygen species (H2O2 and O2•−) and methylglyoxal. Salinity also impaired the non-enzymatic and enzymatic components of the antioxidant defense system. On the other hand, excessive Na+ uptake induced ionic stress which resulted in a lower content of other minerals (K+, Ca2+, and Mg2+), and a reduction in photosynthetic pigment synthesis and plant growth. After 2 days in the normal nutrient solution, the plants showed improvements in antioxidant and glyoxalase system activities, followed by improvements in plant growth, water balance, and chlorophyll synthesis. The antioxidant and glyoxalase systems worked in concert to scavenge toxic reactive oxygen species (ROS), thereby reducing lipid peroxidation and membrane damage. Taken together, these findings indicate that tomato plants can tolerate salinity and show rapid post-stress recovery by enhancement of their antioxidant defense and glyoxalase systems.

Overexpression of LeNHX4 improved yield, fruit quality and salt tolerance in tomato plants (Solanum lycopersicum L.)

2020 ◽  
Vol 47 (6) ◽  
pp. 4145-4153 ◽  
Author(s):  
Mostapha Maach ◽  
Mourad Baghour ◽  
Mustapha Akodad ◽  
Francisco Javier Gálvez ◽  
María Elena Sánchez ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Solanum Lycopersicum ◽  
Fruit Quality ◽  
Tomato Plants ◽  
Solanum Lycopersicum L

Nitrogen and photorespiration pathways, salt stress genotypic tolerance effects in tomato plants (Solanum lycopersicum L.)

2019 ◽  
Vol 42 (1) ◽  
Author(s):  
Alejandro de la Torre-González ◽  
Eloy Navarro-León ◽  
Begoña Blasco ◽  
Juan M. Ruiz
Keyword(s):  
Salt Stress ◽  
Solanum Lycopersicum ◽  
Tomato Plants ◽  
Solanum Lycopersicum L

scholarly journals Analysis of Volatile Compound at Different Age of Corn Crops Used as Bemisia tabaci Repellent

2019 ◽  
Vol 23 (1) ◽  
pp. 142
Author(s):  
Retno Wikan Tyasningsiwi ◽  
Witjaksono Witjaksono ◽  
Siwi Indarti
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Bemisia Tabaci ◽  
Volatile Compound ◽  
Gas Chromatography Mass Spectrometry ◽  
Patchouli Alcohol ◽  
Main Crop ◽  
Chromatography Mass Spectrometry

Bemisia tabaci is one of the red chili pests that plays a role as a Begomovirus vector. This vector can be controlled through Integrated Pest Management (IPM) practices. One of the potential practices is by utilizing corn as a barrier crop to prevent the vector from attacking the main crop. The aim of this research was to examine the repellence activity of the volatile compound obtained from various ages of corn crop against B. tabaci. The volatile compound was collected from the corns at 4 week after planting (WAP), 6 WAP, 8 WAP, 10 WAP, and 12 WAP. Volatile compound capture device was designed with two solvents, i.e. hexane and ethanol, then the volatile compound analyzed by Gas Chromatography Mass Spectrometry (GC-MS). B. tabaci repellency against volatile compound was examined using Y-tube olfactometer. Each treatment was employed with 5 replications. Data were analyzed using ANOVA with 95% and further analyzed by Least Significant Different (LSD). The parameter observed was the total of B. tabaci avoided the volatile compound tested until half of the control olfactometer arm. The results showed that all ages of the corn produced repellent compound and the most optimal were corn aged 12 WAP with repellency rate of 83.72%. GC-MS analysis identified the volatile compound were citronella, limonene, β-phellandrene, β-caryophyllene, 1.8 cineole, farnesol, caryophyllene, and patchouli alcohol.

scholarly journals β-Cyclocitral, a Master Regulator of Multiple Stress-Responsive Genes in Solanum lycopersicum L. Plants

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2465
Author(s):  
Shreyas Deshpande ◽  
Vishwabandhu Purkar ◽  
Sirsha Mitra
Keyword(s):  
Solanum Lycopersicum ◽  
Calcium Binding ◽  
Environmental Stresses ◽  
Transcriptional Responses ◽  
Biosynthetic Genes ◽  
Tomato Plants ◽  
Multiple Stress ◽  
Solanum Lycopersicum L ◽  
Stress Responsive Genes ◽  
Upregulated Genes

β-cyclocitral (βCC), a major apocarotenoid of β-carotene, enhances plants’ defense against environmental stresses. However, the knowledge of βCC’s involvement in the complex stress-signaling network is limited. Here we demonstrate how βCC reprograms the transcriptional responses that enable Solanum lycopersicum L. (tomato) plants to endure a plethora of environmental stresses. Comparative transcriptome analysis of control and βCC-treated tomato plants was done by generating RNA sequences in the BGISEQ-500 platform. The trimmed sequences were mapped on the tomato reference genome that identifies 211 protein-coding differentially expressed genes. Gene ontology and Kyoto Encyclopedia of Genes and Genomes analysis and their enrichment uncovered that only upregulated genes are attributed to the stress response. Moreover, 80% of the upregulated genes are functionally related to abiotic and biotic stresses. Co-functional analysis of stress-responsive genes revealed a network of 18 genes that code for heat shock proteins, transcription factors (TFs), and calcium-binding proteins. The upregulation of jasmonic acid (JA)-dependent TFs (MYC2, MYB44, ERFs) but not the JA biosynthetic genes is surprising. However, the upregulation of DREB3, an abscisic acid (ABA)-independent TF, validates the unaltered expression of ABA biosynthetic genes. We conclude that βCC treatment upregulates multiple stress-responsive genes without eliciting JA and ABA biosynthesis.

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