Journal of Experimental Botany, Vol 49, 1437-1445, Copyright © 1998 by Oxford University Press
I Dodd, C Critchley, G Woodall and G Stewart
Photoinhibition, as measured by the dark-adapted chlorophyll
a fluorescence ratio
Fv/Fm, was assessed in
Syzygium moorei, a species with dark green juvenile
leaves, Syzygium corynanthum, which has light green
juvenile leaves, and two species with pink-red juvenile leaves
(Syzygium wilsonii and Syzygium
luehmannii). All plants were glasshouse-grown (maximum
PPFD 1500
ARTICLES
Photoinhibition in differently coloured juvenile leaves of Syzygium species
Department of Botany, The University of Queensland, St Lucia 4072, Australia; Corresponding author
mol
m-2 s-1) under optimum
nutrition and water.When measured at midday, dark-adapted
Fv/Fm ratios of juvenile leaves
gradually increased in all species as percentage of full leaf expansion (%
FLE) increased. Fluorescence measurement 3h after
sunset or pre-dawn also showed a developmental effect on
Fv/Fm, with juvenile leaves of
S. luehmannii and S. wilsonii
showing much lower Fv/Fm at all
stages of development. Dark-adapted
Fv/Fm, values in both juvenile
and mature leaves generally never exceeded 0.8 at any stage in any of the
species.Courses of Fv/Fm on sunny
days showed greater diurnal photoinhibition in green juvenile
(c. 50% FLE) leaves of
S. moorei (24%) and S.
corynanthum (36%) than in mature leaves of the previous flush in
these species (<10%). Diurnal photoinhibition was statistically
similar (18-24%) in pink-red juvenile and green mature leaves of
S. luehmannii and S. wilsonii.
Re-positioning juvenile leaves of S. wilsonii
horizontally increased diurnal photoinhibition.Exposure of leaves to a
standard mild photoinhibitory light treatment (30 min at 1000 mol
m-2s-1) showed that juvenile
leaves of all species had a lower percentage of high energy state quenching
(qE) and a higher percentage of photoinhibitory
quenching (qI) than mature
leaves.Keywords: Syzygium,
photoinhibition, leaf development, chlorophyll fluorescence,
non-photochemical quenching, anthocyanins
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  N. M. Hughes, T. C. Vogelmann, and W. K. Smith Optical effects of abaxial anthocyanin on absorption of red wavelengths by understorey species: revisiting the back-scatter hypothesis J. Exp. Bot., September 1, 2008; 59(12): 3435 - 3442. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. Heddad, H. Noren, V. Reiser, M. Dunaeva, B. Andersson, and I. Adamska Differential Expression and Localization of Early Light-Induced Proteins in Arabidopsis Plant Physiology, September 1, 2006; 142(1): 75 - 87. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. Hormaetxe, J. M. Becerril, I. Fleck, M. Pinto, and J. I. Garcia-Plazaola Functional role of red (retro)-carotenoids as passive light filters in the leaves of Buxus sempervirens L.: increased protection of photosynthetic tissues? J. Exp. Bot., October 1, 2005; 56(420): 2629 - 2636. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. S. Feild, D. W. Lee, and N. M. Holbrook Why Leaves Turn Red in Autumn. The Role of Anthocyanins in Senescing Leaves of Red-Osier Dogwood Plant Physiology, October 1, 2001; 127(2): 566 - 574. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. L. Hale, S. P. McGrath, E. Lombi, S. M. Stack, N. Terry, I. J. Pickering, G. N. George, and E. A.H. Pilon-Smits Molybdenum Sequestration in Brassica Species. A Role for Anthocyanins? Plant Physiology, August 1, 2001; 126(4): 1391 - 1402. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. S. Gould, K. R. Markham, R. H. Smith, and J. J. Goris Functional role of anthocyanins in the leaves of Quintinia serrata A. Cunn. J. Exp. Bot., June 1, 2000; 51(347): 1107 - 1115. [Abstract] [Full Text] [PDF]
|
|