Journal article

Responses of rainforest understorey plants to excess light during sunflecks

JR Watling, SA Robinson, IE Woodrow, CB Osmond

Functional Plant Biology | Published : 1997


Responses of Alocasia macrorrhiza (L.) G. Don, Castanospora alphandii (F. Muell.) F. Muell, and Alpinia hylandii R. Smith, growing in a tropical rainforest understorey, to excess light during sunflecks were investigated using chlorophyll fluorescence techniques and by analysing xanthophyll cycle activity. A fourth species, the pioneer Omalanthus novo-guineensis (Warb.) Schum., growing in a small gap, was also studied. In all three understorey species there were large and rapid decreases in the proportion of open Photosystem II (PSII) centres, as indicated by q(p), on illumination with saturating light and a concurrent increase in non-photochemical quenching. q(p) remained low (< 0.4) through..

View full abstract

University of Melbourne Researchers

Citation metrics