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Brazilian Journal of Botany

, Volume 41, Issue 1, pp 227–231 | Cite as

A possible role of leaf vascular network in heat dissipation in Vitis vinifera L.

  • Mario Pagano
  • Alberto Palliotti
  • Lorenzo Baldacci
  • Giorgio Carelli
  • Paolo Storchi
Short Communication
  • 86 Downloads

Abstract

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.

Keywords

Drought stress Grapevine Heat Plants Thermal imaging Vein density 

Abbreviations

Cp

Specific heat of air at constant pressure

dTLeaf dt−1

Rate of temperature changed

E

Transpiration rate

gs

Stomatal conductance

h

Heat-transfer coefficient

LED

Light-emitting diode

LE

Evaporation of transpired moisture

M

Mass per unit of leaf

PN

Net photosynthetic rate

ppm

Parts per million

PSII

Photosystem II

PAR

Photosynthetic active radiation

\(\rho\)

Density of air

R

Net radiant energy flux

r

Diffusion resistance

RH

Relative humidity

s

Specific heat of leaf material

VD

Leaf vein density

VPD

Vapour pressure deficit

Notes

Acknowledgements

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.

Authors’ contributions

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.

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Copyright information

© Botanical Society of Sao Paulo 2017

Authors and Affiliations

  1. 1.CREA – Research Centre for Viticulture and EnologyArezzoItaly
  2. 2.Dipartimento di scienze agrarie, alimentari ed ambientaliUniversità di PerugiaPerugiaItaly
  3. 3.NEST, CNR – Istituto Nanoscienze and Scuola Normale SuperiorePisaItaly
  4. 4.Dipartimento di FisicaUniversità di PisaPisaItaly

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