Trichomes are unique polarized cells of the plant epidermis that provide an excellent model system for studying the plant cytoskeleton. Unlike Arabidopsis trichomes that are unicellular with a typical three-branch shape, the trichomes in tomato (Solanum lycopersicum) are multicellular with additional morphology and function diversity. Technically, it is hard to image tomato trichomes at the subcellular level because of their size and because they can be easily damaged. Here, we describe the methods we have used for the visualization and quantification of cytoskeletal arrangements in tomato trichomes which are at different developmental stages, using both live-cell imaging and phalloidin staining after fixation.
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http://dx.doi.org/10.1007/978-1-0716-2867-6_27 | DOI Listing |
Pest Manag Sci
January 2025
Department of Entomology and Nematology, University of California, Davis, USA.
Background: Light-emitting diodes (LEDs) are being used in controlled environments to enhance crop production and pest management with most studies focusing on continuous treatments (applied throughout the entire daytime or nighttime period). Here, we tested the hypothesis that providing tomato plants with timed LED regimes (daily 3-h doses of red, blue, or far-red LED) during the day or at night may affect their traits (leaf reflectance indices, element composition, and phenolic profile), performance of two-spotted spider mites (Tetranychus urticae) (TSSM), and a species of predatory mite (Phytoseiulus persimilis).
Results: Nighttime LED regimes significantly altered leaf element composition: red LED increased K levels, blue LED enhanced Mg levels, and far-red LED enhanced Mn and Cu and reduced Zn levels.
J Am Soc Mass Spectrom
January 2025
Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States.
Leaves of tomato plants contain various glandular trichomes that produce a wide range of metabolic products including acylsugars, which may serve as a defense mechanism against various insect pests. Acylsugars exhibit significant structural diversity, differing in their sugar cores, acylated positions, and type of acyl chains. This work demonstrated a comprehensive approach using multidimensional separation techniques, specifically liquid chromatography-ion mobility-tandem mass spectrometry (LC-IM-MS/MS), for structural characterization, and the discrimination of different tomato plants (one cultivar and five accessions) was demonstrated using tomato leaf extracts; six genotypes from five species of were represented.
View Article and Find Full Text PDFPest Manag Sci
November 2024
Agroscope, Research Division Agroecology and Environment, Zurich, Switzerland.
Background: Phthorimaea absoluta, a highly destructive invasive pest, poses a significant threat to tomato production globally. Exploring alternative control methods, such as host plant resistance can contribute to diminish reliance on insecticides and promote sustainable integrated pest management (IPM) practices. Thus, the identification of new P.
View Article and Find Full Text PDFPlant Cell
October 2024
College of Life Sciences, College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Herbivore-induced wounding can elicit a defense response in plants. However, whether plants possess a surveillance system capable of detecting herbivore threats and initiating preparatory defenses before wounding occurs remains unclear. In this study, we reveal that tomato (Solanum lycopersicum) trichomes can detect and respond to the mechanical stimuli generated by herbivores.
View Article and Find Full Text PDFPlant Dis
September 2024
IHSM-UMA-CSIC, Estacion Experimental La Mayora, Algarrobo-costa, Malaga, Spain, 29750;
Tomato yellow leaf curl virus (TYLCV) is a begomovirus (genus , family ) transmitted persistently by the whitefly . It causes tomato yellow leaf curl disease (TYLCD), resulting in significant yield losses worldwide. TYLCD is controlled mainly by using F1 hybrid tomato cultivars harboring the TYLCV resistance gene .
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