Abstract
previous work on the New Zealand mistletoes Ileostylus micranthus and Tupeia antarctica indicates that these mistletoes have lower maximum electron transport rates (ETRmax) than their hosts. We extend this research by testing Seven of the eight extant endemic New Zealand mistletoes using chlorophyll fluorescence measurements. In addition, we examined whether loranthaceous (Alepis flavida&Ileostylus micranthus, peraxilla Colensoi p. tetra‐petala Tupeia antarctica) and viscaceous mistletoes (Korthalsella Iindsayi, K. salicornioides) differed in their capacities for electron transport. Electron transport rates were significantly related to photosyn‐thetically active Photon flux densities (PPFD). Overall, mistletoes had significantly lower (110 ± 18 mol m‐ s‐1) ETRmax than their hosts (219 ± 43 mol m‐2 S‐1) but Some specific host‐mistletoes Pairs showed no significant difference in ETRmax There was no clear distinction in ETRmax between mistletoe families. We conclude that New Zealand mistletoes generally have lower electron transport rates at the same PPFD and, usually, lower photosynthetic capacities than their hosts.
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