Browse Articles

Article|19 Feb 2022|OPEN
Fruit transpiration drives interspecific variability in fruit growth strategies
Federica Rossi1 , Luigi Manfrini1 , Melissa Venturi1 , Luca Corelli Grappadelli1 and Brunella Morandi,1 ,
1Department of Agricultural and Food Sciences, University of Bologna, V.le Fanin 44, 40127, Bologna (Italy)
*Corresponding author. E-mail: brunella.morandi@unibo.it

Horticulture Research 9,
Article number: uhac036 (2022)
doi: https://doi.org/10.1093/hr/uhac036
Views: 24

Received: 16 Jul 2021
Accepted: 25 Dec 2021
Published online: 19 Feb 2022

Abstract

Fruit growth is a complex mechanism resulting from biochemical and biophysical events leading water and dry matter to accumulate in the fruit tissues. Understanding how fruits choose their growth strategies can help growers optimizing their resource management for a more sustainable production and a higher fruit quality. This paper compares the growth strategies adopted by different fruit crops, at different times during the season and relates their fruit surface conductance to key physiological parameters for fruit growth such as phloem and xylem inflows as well transpiration losses. Our results show how fruits capacity to transpire (determined by their surface conductance) is a key driver in determining the growth strategy adopted by a species and explains the inter-species variability existing among different crops. Indeed, fruits change their surface conductance depending on the species and the phenological stage. This has an impact on the fruit’s ability to lose water due to transpiration, affecting fruit pressure potential and increasing the force with which the fruit is able to attract xylem and phloem flows, with a considerable impact on fruit growth rate.