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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/112594
Title: 
Bacterial leaf glands in Styrax camporum (Styracaceae): first report for the family
Author(s): 
Institution: 
  • Universidade Estadual Paulista (UNESP)
  • Universidade de São Paulo (USP)
ISSN: 
1916-2790
Sponsorship: 
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Sponsorship Process Number: 
  • FAPESP: 08/55434-7
  • CNPq: 470643/2006-4
Abstract: 
In this study, we recorded, for the first time, the occurrence of leaf glands in a member of Styracaceae and their association with bacteria. Samples of Styrax camporum Pohl shoot apices and leaves at different developmental stages were prepared according to the conventional techniques for light and electron microscopy. Glands are emergences constituted by epidermal and parenchyma cells and are differentiated into a secretory body on a short nonsecretory stalk supplied with phloem. Actively secreting glands occur from leaf primordia to mature leaves and produce mucilage that accumulates inside schizogenous intercellular spaces. The epidermal secretory cells have abundant cytoplasm rich in hyperactive dictyosomes, an extensive endoplasmic reticulum, and modified plastids. Bacteria enter the gland via the intact surface and proliferate in the intercellular spaces of the glands. Once inside the intercellular spaces of the glands, bacteria enter the cells owing to the weakening of the anticlinal and inner periclinal cell walls and by phagocytosis. Strands of actin filaments occur near the endocytical vesicles containing degenerating bacteria. Accumulations of phenolic compounds and callose could explain the absence of bacteria in the stalk cells. The presence of bacteria inside the leaf glands of S. camporum is a regular and cyclic trait. The significance of the bacteria (not yet identified) and the type of interaction between these two organisms remain unknown.
Issue Date: 
1-May-2014
Citation: 
Botany-botanique. Ottawa: Canadian Science Publishing, Nrc Research Press, v. 92, n. 5, p. 403-411, 2014.
Time Duration: 
403-411
Publisher: 
Canadian Science Publishing, Nrc Research Press
Keywords: 
  • anatomy
  • bacteria
  • leaf glands
  • Styrax camporum
  • symbiosis
  • ultrastructure
Source: 
http://dx.doi.org/10.1139/cjb-2013-0297
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/112594
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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