water acquisition

How to Cite

Reinert, F., & Meirelles, S. (1993). WATER ACQUISITION STRATEGY SHIFTS IN THE HETEROPHYLOUS SAXICOLOUS BROMELIAD, VRIESEA GENICULATA (WAWRA) WAWRA. Selbyana, 14, 80–88. Retrieved from https://ojs.test.flvc.org/selbyana/article/view/122799


Vriesea geniculata produces two distinct morphological forms during its life cycle. Juveniles exhibit non-impounding rosettes composed ofsucculent narrow leaves bearing numerous elaborated trichomes. Adults possess an impounding rosette featuring flat broad leaves with nearly glabrous blades. Trichomes with a 4+8+ 16+32+64 shield cell pattern cover 80% ofjuvenile foliage. Trichomes with a reduced shield cell arrangement (4+8+32) cover less than 14% ofleafbase in the adult form. Stomatal
density increases distally while trichome density increases towards the leafbase in both life forms. There
are no adaxial stomata. Both atmospheric and tank forms show C3 photosynthesis.


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