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Title: Effect of Different Photon Flux Densities (PAR) on Seedling Growth and Morphology of Metrosideros collina (Forst.) Gray 
Author: Friend, Douglas J.
Date: 1980-04
Publisher: University of Hawaii Press
Citation: Friend DJ. 1980. Effect of different Photon Flux Densities (PAR) on seedling growth and morphology of Metrosideros collina (Forst.) Gray. Pac Sci 34(2): 93-100.
Abstract: Seedlings of Metrosideros were capable of net accumulation of
dry matter at photon flux densities as low as 13 umol m-2 s-1 PAR (about
0.6 percent sunlight), when grown under a 12-hour day1ength at 20° or 25°C
for over 4 months. Seedlings became adapted to shade at low levels of PAR
by an increased leafiness of the plant (expressed as the leaf area ratio). This
increased leafiness was brought about by a marked reduction in leaf thickness
rather than by an increase in the proportion of assimilates distributed to
ISSN: 0030-8870

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