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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.)

Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in Kielmeyera

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Author(s):
Costa, Ellenhise R. [1] ; Tangerina, Marcelo M. P. [1] ; Ferreira, Marcelo J. P. [1] ; Demarco, Diego [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Biociencias, Dept Bot, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: PLANTS-BASEL; v. 10, n. 5 MAY 2021.
Web of Science Citations: 0
Abstract

Secretory ducts have been reported for more than 50 families of vascular plants among primary and secondary tissues. A priori, all ducts of a plant are of the same type, and only slight variations in the concentration of their compounds have been reported for few species. However, two types of secretion were observed in primary and secondary tissues of Kielmeyera appariciana, leading us to investigate the possible influence of duct origins on the structure and metabolism of this gland. Kielmeyera appariciana has primary ducts in the cortex and pith and secondary ducts in the phloem. Both ducts are composed of uniseriate epithelium surrounded by a sheath and a lumen formed by a schizogenous process. Despite their similar structure and formation, the primary ducts produce resin, while the secondary ducts produce gum. This is the first report of two types of ducts in the same plant. The distinct origin of the ducts might be related to the metabolic alteration, which likely led to suppression of the biosynthetic pathway of terpenoids and phenolics in the secondary ducts. The functional and evolutionary implications of this innovation are discussed in our study and may be related to the diversification of Kielmeyera and Calophyllaceae in tropical environments. (AU)

FAPESP's process: 17/23882-0 - Articulated and non-articulated laticifers: structure, development and evolution
Grantee:Diego Demarco
Support Opportunities: Regular Research Grants
FAPESP's process: 14/21593-2 - Baccharis L. (Asteraceae) and endophytic fungi: secondary metabolites and biological activities
Grantee:Marcelo José Pena Ferreira
Support Opportunities: Regular Research Grants
FAPESP's process: 17/15085-2 - Development, secretory activity and chemical composition of the resin from ducts of Kielmeyera appariciana Saddi (Calophyllaceae)
Grantee:Ellenhise Ribeiro Costa
Support Opportunities: Scholarships in Brazil - Master