Artículos de revistas
Vacuolar Remodelling Mediates Touch-induced Androgynophore Movement In Passiflora (subg. Decaloba, Sect. Xerogona) Flowers
Registro en:
Flora: Morphology, Distribution, Functional Ecology Of Plants. Urban Und Fischer Verlag Jena, v. 209, n. 11, p. 613 - 619, 2014.
3672530
10.1016/j.flora.2014.07.003
2-s2.0-84922531955
Autor
Scorza L.C.T.
Rossi M.L.
Dornelas M.C.
Institución
Resumen
Some species of the genus Passiflora (sect. Xerogona) have flowers that exhibit a mechanically-induced movement of the androgynophore that is probably involved in pollination. Despite the many reports of touch-induced movements of floral parts, the studies concerning anatomical, ultrastructural and molecular aspects of the plant movements are restricted to the vegetative parts. Rapid plant movements are highly dependent on turgor changes of a particular flexible tissue formed by specialized cells capable of losing and gaining water rapidly. Thigmotropic androgynophores of four species of Passiflora from section Xerogona were analyzed at cellular and subcellular levels. Our results show that the movement is due to a vacuolar remodelling in a group of parenchymatous cells at the base of the androgynophore. After the movement, plasmolyzed and multivacuolated cells are present at the stimulated side and turgid and univacuolated cells at the opposite side. 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