AOBPreview originally published online on May 16, 2006
Annals of Botany 2006 98(1):257-265; doi:10.1093/aob/mcl097
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
The Photoprotective Role of Epidermal Anthocyanins and Surface Pubescence in Young Leaves of Grapevine (Vitis vinifera)
1 Laboratory of Plant Physiology, Department of Agricultural Biotechnology, Agricultural University of Athens, Iera Odos 75, 118 55, Botanikos, Athens, Greece and 2 Laboratory of Plant Physiology, Department of Biology, University of Patras, 265 00, Patras, Greece
* For correspondence. E-mail g_liak{at}aua.gr
Received: 2 December 2005 Returned for revision: 7 February 2006 Accepted: 23 March 2006 Published electronically: 16 May 2006
• Background and Aims Depending on cultivar, surfaces of young leaves of Vitis vinifera may be glabrous-green (‘Soultanina’) or transiently have anthocyanins (‘Siriki’) or pubescence (‘Athiri’). A test is made of the hypothesis that anthocyanins and pubescence act as light screens affording a photoprotective advantage to the corresponding leaves, and an assessment is made of the magnitude of their effect.
• Methods Measurements were made on young leaves of the three cultivars in spring under field conditions. Photosynthetic gas-exchange and in vivo chlorophyll fluorescence were measured. Photosynthetic and photoprotective pigments were analysed by HPLC.
• Key Results Compared with glabrous-green leaves, both anthocyanic and pubescent leaves had greater dark-adapted PSII photochemical efficiency and net photosynthesis. In leaves possessing either anthocyanins or pubescence, the ratio of xanthophyll cycle components to total chlorophyll, and mid-day de-epoxidation state of the xanthophyll cycle were considerably smaller, than in glabrous-green leaves. These differences were more evident in pubescent leaves, probably indicating that trichomes were more effective in decreasing light stress than anthocyanins in the epidermis.
• Conclusions Light screens, especially in the form of pubescence, decrease the risk of photoinhibition whilst allowing leaves to maintain a smaller content of xanthophyll cycle components and depend less on xanthophyll cycle energy dissipation. This combination of photoprotective features, i.e. decreased photon flux to the photosynthetic apparatus and lower xanthophyll cycle utilization rates may be particularly advantageous under stressful conditions.
Key words: Anthocyanins, Vitis vinifera, leaf development, photoprotection, photosynthesis, pubescence, xanthophyll cycle
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  H. Kobayashi, S. Suzuki, F. Tanzawa, and T. Takayanagi Low Expression of Flavonoid 3',5'-Hydroxylase (F3',5'H) Associated with Cyanidin-based Anthocyanins in Grape Leaf Am. J. Enol. Vitic., September 1, 2009; 60(3): 362 - 367. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. Zeliou, Y. Manetas, and Y. Petropoulou Transient winter leaf reddening in Cistus creticus characterizes weak (stress-sensitive) individuals, yet anthocyanins cannot alleviate the adverse effects on photosynthesis J. Exp. Bot., July 1, 2009; 60(11): 3031 - 3042. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. R. Steele, A. A. Gitelson, D. C. Rundquist, and M. N. Merzlyak Nondestructive Estimation of Anthocyanin Content in Grapevine Leaves Am. J. Enol. Vitic., March 1, 2009; 60(1): 87 - 92. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
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]
|
|
|
|
 |
|
 T. D. Kim, B. S. Lee, T. S. Kim, and Y. E. Choi Developmental Plasticity of Glandular Trichomes into Somatic Embryogenesis in Tilia amurensis Ann. Bot., August 1, 2007; 100(2): 177 - 183. [Abstract] [Full Text] [PDF]
|
|