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  5.     <title>UTas ePrints - Light response characteristics of a morphologically diverse group of southern hemisphere conifers as measured by chlorophyll fluorescence</title>
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  13.     <meta content="Brodribb, Tim J." name="eprints.creators_name" />
  14. <meta content="Hill, Robert S." name="eprints.creators_name" />
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  21. <meta content="Light response characteristics of a morphologically diverse group
  22. of southern hemisphere conifers as measured
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  28. <meta content="chlorophyll fluorescence; light response; leaf morphology; shade adaptation; conifers " name="eprints.keywords" />
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  30. " name="eprints.note" />
  31. <meta content="Unlike northern hemisphere conifer families, the southern family, Podocarpaceae, produces a great variety of foliage forms ranging from functionally broad-, to needle-leaved. The production of broad photosynthetic surfaces in podocarps has been linked qualitatively to low-light-environments, and we undertook to assess the validity of this assumption by measuring the light response of a morphologically diverse group of podocarps. The light response, as apparent photochemical electron transport rate (ETR), was measured by modulated fluorescence in ten species of this family and six associated species (including five Cupressaceae and one functionally needle-leaved angiosperm) all grown under identical glasshouse conditions. In all species, ETR was found to increase as light intensity increased, reaching a peak value (ETR(max)) at saturating quantum flux (PPFDsat), and decreasing thereafter. ETR(max) ranged from 217 mu mol electrons . m(-2). s(-1) at a PPFDsat of 1725 mu mol photons . m(-2). s(-1) in Actinostrobus acuminatus to an ETR of 60 mu mol electrons . m(-2). s(-1) at a PPFDsat of 745 mu mol electrons . m(-2). s(-1) in Podocarpus dispermis. Good correlations were observed between ETR(max) and both PPFDsat and maximum assimilation rate measured by gas-exchange analysis. The effective quantum yield at light saturation remained constant in all species with an average value of 0.278 +/- 0.0035 determined for all 16 species. Differences in the shapes of light response curves were related to differences in the response of non-photochemical quenching (q(n)), with q(n) saturating faster in species with low PPFDsat. Amongst the species of Podocarpaceae, the log of average shoot width was well correlated with PPFDsat, wider leaves saturating at lower light intensities. This suggests that broadly flattened shoots in the Podocarpaceae are an adaptation to low light intensity. " name="eprints.abstract" />
  32. <meta content="1997" name="eprints.date" />
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  34. <meta content="Oecologia" name="eprints.publication" />
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  38. <meta content="10.1007/s004420050127" name="eprints.id_number" />
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  42. <meta content="Bilger W, Schreiber U, Brock M (1995) Determination of the
  43. quantum efficiency of photosystem II and of non-p
  44. quenching of chlorophyll ¯uorescence in the ®eld. Oecologia
  45. 102: 425±432
  46. BjoÈrkman O, Demmig B (1987) Photon yield of O2 evolution and
  47. chlorophyll ¯uorescence characteristics at 77 K among vascular
  48. plants of diverse origins. Planta 170: 489±504
  49. Bond WJ (1989) The tortoise and the hare: ecology of angiosperm
  50. dominance and gymnosperm persistence. Biol J Linn Soc 36:
  51. 227±249
  52. Bordman N (1977) Comparative photosynthesis of sun and shade
  53. plants. Annu Rev Plant Physiol 28: 355±377
  54. Brodribb T (1996) Dynamics of changing intercellular CO2 concentration
  55. during drought and determination of minimum
  56. functional ci. Plant Physiol 111: 179±185
  57. Carter GA, Smith WK (1985) In¯uence of shoot structure on light
  58. interception and photosynthesis in conifers. Plant Physiol 79:
  59. 1038±1043
  60. Demmig-Adams B, Adams W, Logan B, Verhoeven A (1995)
  61. Xanthophyll cycle dependant energy dissipation and ¯exible
  62. photosystem II efficiency in plants acclimated to light stress.
  63. Aust J Plant Physiol 22: 249±260
  64. Edwards GE, Baker NR (1993) Can assimilation in maize leaves be
  65. predicted accurately from chlorophyll ¯uorescence analysis?
  66. Photosynth Res 37: 89±102
  67. Enright NJ, Hill RS (eds) (1995) Ecology of the southern conifers.
  68. Melbourne University Press, Melbourne
  69. Farquhar GD, Caemmerer S von, Berry JA (1980) A biochemical
  70. model of photosynthetic CO2 assimilation in leaves of C3 species.
  71. Planta 149: 78±90
  72. Genty B, Briantais J, Baker NR (1989) The relationship between
  73. the quantum yield of photosynthetic electron transport and
  74. quenching of chlorophyll ¯uorescence. Biochim Biophys Acta
  75. 990: 87±92
  76. Hill RS (1995) Conifer origin, evolution and diversi®cation in the
  77. southern hemisphere. In: Enright NJ, Hill RS (eds) Ecology of
  78. the southern conifers. Melbourne University Press, Melbourne
  79. pp 10±29
  80. Hill RS, Carpenter RJ (1991) Evolution of Acmopyle and Dacrycarpus
  81. (Podocarpaceae) foliage as inferred from macrofossils in
  82. south-eastern Australia. Aust Sys Bot 4: 449±479
  83. Hill RS, Pole MS (1992) Leaf and shoot morphology of extant
  84. Afrocarpus, Nageia and Retrophyllum (Podocarpaceae) species,
  85. and species with similar leaf arrangement from Tertiary sediments
  86. in Australasia. Aust Syst Bot 5: 337±358
  87. Hill RS, Scriven LJ (1995) The angiosperm-dominated woody
  88. vegetation of Antarctica: a review. Rev of Palaeobot Palynol
  89. 86: 175±198
  90. Leverenz JW (1995) Shade shoot structure of conifers and the
  91. photosynthetic response to light at two CO2 partial pressures.
  92. Funct Ecol 9: 413±421
  93. Loreto F, Domenico T, Di Marco G (1995) On the relationship
  94. between electron transport rate and photosynthesis in leaves of
  95. the C4 plant Sorghum bicolor exposed to water stress, temperature
  96. changes and carbon metabolism inhibition. Aust J Plant
  97. Physiol 22: 885±892
  98. KoÈniger M, Harris GC, Virgo A, Winter K (1995) Xanthophyllcycle
  99. pigments and photosynthetic capacity in tropical forest
  100. species: a comparative ®eld study on canopy gap and understorey
  101. plants. Oecologia 104: 280±290
  102. McKiernan M, Baker NR (1992) A method for the rapid monitoring
  103. of photosynthetic shade adaptation in leaves. Funct Ecol
  104. 6: 405±410
  105. 16
  106. Schreiber U, Bilger W (1992) Progress in chlorophyll ¯uorescence
  107. research: major developments during the past years in retrospect.
  108. Prog Bot 54: 151±173
  109. Schreiber U, Schlewa U, Bilger W (1986) Continuous recording of
  110. photochemical and non±photochemical chlorophyll ¯uorescence
  111. quenching with a new type of modulation ¯uorometer.
  112. Photosynth Res 10: 51±62
  113. Schreiber U, Bilger W, Neubauer C (1994) Chlorophyll ¯uorescence
  114. as a non-intrusive indicator for rapid assessment of in
  115. vivo photosynthesis. In: Schulze ED, Caldwell MM (eds) Ecophysiology
  116. of photosynthesis. Springer, Berlin Heidelberg New
  117. york, pp 49±70
  118. Sorrensen-Cothern KA, Ford ED, Sprugel DG (1993) A model of
  119. competition incorporating plasticity through modular foliage
  120. and crown development. Ecol Monogr 63: 277±304
  121. Taylor G, Truswell EM, McQueen KG, Brown MC (1990) Early
  122. Tertiary palaeogeography, landform evolution and palaeoclimates
  123. of the Southern Monaro, NSW, Australia. Palaeogeogr
  124. Palaeoclimatol Palaeoecol 78: 109±134
  125. Truswell EM (1991) Antarctica: a history of terrestrial vegetation.
  126. In: Tingey RJ (ed) The geology of Antarctica. Clarendon, Oxford.
  127. pp 499±537
  128. Yun JI, Taylor SE (1986) Adaptive implications of leaf thickness
  129. for sun- and shade-grown Abutilon theophrasti. Ecology 67:
  130. 1314±131" name="eprints.referencetext" />
  131. <meta content="Brodribb, Tim J. and Hill, Robert S. (1997) Light response characteristics of a morphologically diverse group of southern hemisphere conifers as measured by chlorophyll fluorescence. Oecologia, 110 (1). pp. 10-17. ISSN 0029-8549" name="eprints.citation" />
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  139. <meta content="270402 Plant Physiology" name="DC.subject" />
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  255.     <h1 class="ep_tm_pagetitle">Light response characteristics of a morphologically diverse group of southern hemisphere conifers as measured by chlorophyll fluorescence</h1>
  256.     <p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Brodribb, Tim J.</span> and <span class="person_name">Hill, Robert S.</span> (1997) <xhtml:em>Light response characteristics of a morphologically diverse group of southern hemisphere conifers as measured by chlorophyll fluorescence.</xhtml:em> Oecologia, 110 (1). pp. 10-17. ISSN 0029-8549</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/2648/1/Oecol__conifer__light.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/2648/1/Oecol__conifer__light.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />419Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="3471" name="docid" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1007/s004420050127">http://dx.doi.org/10.1007/s004420050127</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Unlike northern hemisphere conifer families, the southern family, Podocarpaceae, produces a great variety of foliage forms ranging from functionally broad-, to needle-leaved. The production of broad photosynthetic surfaces in podocarps has been linked qualitatively to low-light-environments, and we undertook to assess the validity of this assumption by measuring the light response of a morphologically diverse group of podocarps. The light response, as apparent photochemical electron transport rate (ETR), was measured by modulated fluorescence in ten species of this family and six associated species (including five Cupressaceae and one functionally needle-leaved angiosperm) all grown under identical glasshouse conditions. In all species, ETR was found to increase as light intensity increased, reaching a peak value (ETR(max)) at saturating quantum flux (PPFDsat), and decreasing thereafter. ETR(max) ranged from 217 mu mol electrons . m(-2). s(-1) at a PPFDsat of 1725 mu mol photons . m(-2). s(-1) in Actinostrobus acuminatus to an ETR of 60 mu mol electrons . m(-2). s(-1) at a PPFDsat of 745 mu mol electrons . m(-2). s(-1) in Podocarpus dispermis. Good correlations were observed between ETR(max) and both PPFDsat and maximum assimilation rate measured by gas-exchange analysis. The effective quantum yield at light saturation remained constant in all species with an average value of 0.278 +/- 0.0035 determined for all 16 species. Differences in the shapes of light response curves were related to differences in the response of non-photochemical quenching (q(n)), with q(n) saturating faster in species with low PPFDsat. Amongst the species of Podocarpaceae, the log of average shoot width was well correlated with PPFDsat, wider leaves saturating at lower light intensities. This suggests that broadly flattened shoots in the Podocarpaceae are an adaptation to low light intensity. </p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Additional Information:</th><td valign="top" class="ep_row">The original publication is available at www.springerlink.com&#13;
  257. </td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">chlorophyll fluorescence; light response; leaf morphology; shade adaptation; conifers </td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/270402.html">270000 Biological Sciences &gt; 270400 Botany &gt; 270402 Plant Physiology</a><br /><a href="http://eprints.utas.edu.au/view/subjects/270400.html">270000 Biological Sciences &gt; 270400 Botany</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">2648</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Scholarly Publications Librarian</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">11 Dec 2007 08:28</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=2648;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&amp;eprintid=2648">item control page</a></p>
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