Abstract
The structure and function of fern galls are poorly studied, especially those occurring in poikilohydric ferns such as Pleopeltis minima (Polypodiaceae), which hosts globoid Cecidomyiidae galls on fronds. We expected that anatomical and histochemical features related to poikilohydry would be expressed in galls, potentially enhancing features that support gall inducer survival. We examined non-galled pinnae (NGP) and galled pinnae (GP) of P. minima from anatomical, histochemical, and histometrical perspectives. The NGP are covered on the abaxial surface by peltate scales with unlignified, pectin-thickened cell walls on the shield, which contain mucilage and polyphenols. The GP are covered by similar but larger scales on the adaxial and abaxial surfaces. This feature, potentiated in galls, is related to water absorption and reduction of water loss.
Keywords:
fern galls; mucilage; pectins; poikilohydry; scales
Full Article: https://www.scielo.br/j/abb/a/PCfLJBBqqMKXj9WN7SZCVpr/?format=html&lang=en