A possible role of leaf vascular network in heat dissipation in Vitis vinifera L.
- 86 Downloads
Recent studies showed how the density of leaf vascular system can be involved in the performance of physiological parameters. Major veins are commonly elevated in the lower epidermis of the leaf, and this anatomical feature could play a subsidiary role in increasing heat dispersion in the surrounding environment and may help dissipate excess light energy in the leaves. The aim of this study is to analyse the role of the leaf vein network in the heat dissipation process in Vitis vinifera (L.). Major leaf veins were insulated with liquid paraffin and analysed using thermal imaging. A significantly higher temperature was found on the leaf tissues with insulated veins compared to untreated leaves. Further studies are required to assess the real contribution of the leaf vascular network in thermal dissipation.
KeywordsDrought stress Grapevine Heat Plants Thermal imaging Vein density
Specific heat of air at constant pressure
- dTLeaf dt−1
Rate of temperature changed
Evaporation of transpired moisture
Mass per unit of leaf
Net photosynthetic rate
Parts per million
Photosynthetic active radiation
Density of air
Net radiant energy flux
Specific heat of leaf material
Leaf vein density
Vapour pressure deficit
The authors would like to thank Anna Vidus Rosin (Giakova srl, www.giakova.com) for the technical thermal device support as well as Maria Cristina Monteverdi, Fulvio Ducci and Maria Sole Vallecoccia for their valuable advice.
MP prepared the plant material and the set-up. MP and LB performed the experimental protocol. MP performed the data analysis; AP, PS and GC supervised the work. All authors contributed to writing the article. All authors read and approved the manuscript.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Acosta-Motos JR, Ortuno MF, Bernal-Vicente A, Diaz-Vivancos P, Sanchez-Blanco MJ, Hernandez JA (2017) Plant responses to salt stress: adaptive mechanisms. https://doi.org/10.20944/preprints201702.0083.v1. (Preprints)
- Chaves MM, Costaa JM, Zarrouka O, Pinheiroa C, Lopesb CM, Pereira JS (2016) Controlling stomatal aperture in semi-arid regions—The dilemma of saving water or being cool? Plant Sci. https://doi.org/10.1016/j.plantsci.2016.06.015
- Hager A (1980) The reversible, light-induced conversions of xanthophyll in the chloroplast. Berichte der Deutschen Botanischen Gesellschaft. http://agris.fao.org/agris-search/search.do?recordID=DE19760070623
- Linacre ET (1964) Determinations of the heat transfer coefficient of a leaf. Plant Physiol 687–690Google Scholar
- Pagano M, Storchi P (2016) Leaf vein density and photosynthetic rate in Rosa: is there a correlation? Bol Soc Argent Bot 51:683–687Google Scholar
- Palliotti A, Silvestroni O, Petoumenou D (2010) Seasonal patterns of growth rate and morpho physiological features in green organs of Cabernet sauvignon grapevines. Am J Enol Viticult 61:74–82Google Scholar
- Palliotti A, Tombesi S, Frioni T, Silvestroni O, Lanari V, D’Onofrio C, Matarese F, Bellincontro A, Poni S (2015) Physiological parameters and protective energy dissipation mechanisms expressed in the leaves of two Vitis vinifera L. genotypes under multiple summer stresses. J Plant Physiol 185:84–92CrossRefPubMedGoogle Scholar
- Parsons-Wingerter P, Vickerman MB (2011) Informative mapping by VESGEN analysis of venation branching pattern in plant leaves such as Arabidopsis thaliana. Gravit Space Res. http://www.gravitationalandspacebiology.org/index.php/journal/article/view/539
- Sack L, Scoffoni C, McKown AD, McKown AD, Frole K, Rawls M, Christopher H, Tran H, Tran T (2012) Developmentally based scaling of leaf venation architecture explains global ecological patterns. Nat Commun 837:1–10Google Scholar
- Taiz L, Zeiger E (2002) Plant physiology, 3rd edn. Sinaeur, Sunderland, pp 591–623Google Scholar