Figuras 14-25
Folha de
Bulbophyllum. Cortes transversais (14, 15, 20, 22, 24, 25), vista frontal (16-19, 21, 23), microscopia eletrônica de varredura (MEV) (18, 19, 21, 23). 14.
B. exaltatum, limbo com estômato (seta preta), epiderme (ep), inserção de tricoma (seta branca), mesofilo homogêneo, idioblastos espiralados (*) e feixe vascular (Fv). 15.
B. plumosum, limbo com estômato (seta preta), epiderme (ep), mesofilo heterogêneo com parênquima paliçádico (pp) e esponjoso (pe), idioblastos espiralados (*) e feixes vasculares (seta branca). 16.
B. exaltatum, face adaxial da epiderme. 17.
B. filifolium, na face abaxial da epiderme e estômato tetracítico. 18.
B. dusenii, face abaxial da epiderme, com cutícula estriada, estômato (seta branca) e tricoma colapsado (seta preta). 19.
B. perii, tricoma na folha jovem, face abaxial. 20.
B. perii, folha jovem, tricoma com célula basal (seta branca) e apical (seta preta). 21.
B. plumosum, tricoma com célula apical colapsada. 22.
B. perii, tricoma, reação positiva para PAS na célula apical (seta). 23.
B. tripetalum, tricoma colapsado na folha adulta com restos de exudatos (seta branca) e hifas (seta preta). 24.
B. weddellii, epiderme (ep) com cutícula espessa e estriada, face abaxial (seta). 25.
B. chloropterum, epiderme (ep) com cutícula moderadamente espessa e lisa, face adaxial (seta). Escalas: 200 μm (14, 15), 50 μm (16, 17, 20, 24, 25), 20 μm (18, 22), 10 μm (19, 21, 23).
Figures 13-25. Bulbophyllum leaf blade. Cross section (14, 15, 20, 22, 24, 25), front view (16-19, 21, 23), in scanning electron microscopy (SEM) (18, 19, 21, 23). 14. B. exaltatum, leaf blade with stomata (black arrow), epidermis (ep), insertion of trichomes (white arrow), homogeneous mesophyll, spiral idioblast (*) and vascular bundle (Fv). 15. B. plumosum, leaf blade with stomata (black arrow), epidermis (ep), heterogeneous mesophyll with palisade parenchyma (pp) and spongy parenchyma (pe), spiral idioblast (black arrow) and vascular bundle (white arrow). 16. B. exaltatum, adaxial epidermis. 17. B. filifolium, abaxial epidermis and tetracytic stomata. 18. B. dusenii, abaxial epidermis, with striated cuticle, stomata (white arrow) and colapsed trichome (black arrow). 19. B. perii, trichomes in young leaf, abaxial epidermis. 20. B. perii, young leaf, trichome with basal cell (white arrow) and apical cell (black arrow). 21. B. plumosum, trichomes with collapsed apical cell. 22. B. perii, trichome, positive reaction for PAS in the apical cell (arrow). 23. B tripetalum, collapsed trichomes in adult leaf, note the exudate (white arrows) and hyphae (black arrows). 24. B. weddellii, epidermis (ep), with thick and striated cuticle (arrow), abaxial side. 25. B. chloropterum, epidermis (ep) with moderate thickening and smooth cuticle (arrow), adaxial side. Scales: 200 μm (14, 15), 50 μm (16, 17, 20, 24, 25), 20 μm (18, 22), 10 μm (19, 21, 23).