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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Non-glandular trichomes in Lamiaceae and Verbenaceae species: morphological and histochemical features indicate more than physical protection

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dos Santos Tozin, Luiz Ricardo ; de Melo Silva, Stefany Cristina ; Rodrigues, Tatiane Maria
Total Authors: 3
Document type: Journal article
Source: NEW ZEALAND JOURNAL OF BOTANY; v. 54, n. 4, p. 446-457, 2016.
Web of Science Citations: 1

Non-glandular trichomes are traditionally known as acting in the physical protection of plants against biotic and abiotic stresses, forming a mechanical barrier against low humidity, high light intensity and temperatures, and feeding and oviposition activities of insects. However, detailed studies involving morphology, histochemistry and ultrastructure of these epidermal appendages are lacking. We characterised the morphology and histochemistry of the non-glandular trichomes in three Lamiaceae and four Verbenaceae species and evidenced their involvement in the production, storage and/or liberation of biologically active substances. Samples of leaves were prepared according to standard methods for scanning and transmission electron microscopy. Histochemical tests were performed using fresh material. The combination of structural and ultrastructural studies and histochemical techniques allowed us to verify that the non-glandular trichomes of all studied species are comprised by living cells able to act in the synthesis, storage and/or liberation of biologically active compounds. This is the first work showing the production of compounds in non-glandular trichomes in Lamiaceae and Verbenaceae species. Our observations indicate that more than a physical protection, the non-glandular trichomes of these species participate in the chemical interaction of the plants with the environment, supplementing the work of the typically glandular trichomes. (AU)

FAPESP's process: 13/07428-6 - Morphological, histochemical and ultrastructural diversity of glandular trichomes in Lantana camara L. (Verbenaceae) and relation between glandular morphotype and secretion
Grantee:Stefany Cristina de Melo Silva
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 08/55434-7 - Secretory structures in plant species from cerrado: structural, chemical and ecological approaches
Grantee:Silvia Rodrigues Machado
Support type: BIOTA-FAPESP Program - Thematic Grants