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Effect of Salinity on Tomato Plant Architecture

Abstract : It is well known that dry weight and fruit production of tomato plants are sharply affected by salinity in the root environment. Moreover, several studies have focussed on the physiological consequences of salinity. However, little information is available dealing with the effect of salinity on the plant architecture, not only on final plant height, number of leaves and leaf area, but also on dynamic information on development and growth from the leaflet to the plant scale. Tomato plants have been grown in glasshouses at four salinity levels (expressed as electrical conductivity of the solution, i.e. 4, 7, 10 and 13 dS m(-1)). Plant development (leaf and cluster initiation), leaf growth rate, final leaf dimensions were measured along the stem following the phytomer rank and treatment. At the leaf scale, the terminal and lateral leaflet were measured (rachis length, leaflet length width and area). Salinity affected the leaflet growth (length and width), the number of leaflets per leaf as well as the internodes of rachis. Therefore, at the leaf scale, the dimensions were affected. Moreover, the growth rate and growth duration were also modified. Longer growth duration for high salinity treatment tended to attenuate the effect on large difference in the leaves growth rate. The leaves internodes were also shortened by the salinity. Therefore, at the plant scale, the height and diameter of plant, as well as the leaves area were decreased with salinity. However, techniques such as thinning out of the leaves were differently applied following the treatment. All these data have been used to estimate the plant development and growth at the leaflet, leaf and plant scale. These parameters are essential input of 3-D dynamic plant architecture, leading to a complete description of the plant architecture, from the leaflet to the plant scale. These plant architectures should be useful to estimate resource acquisition and radiative balance.
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https://hal.inrae.fr/hal-02756683
Contributor : Migration Prodinra <>
Submitted on : Wednesday, June 3, 2020 - 11:14:30 PM
Last modification on : Tuesday, February 9, 2021 - 11:48:04 AM

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Safaa Najla, Gilles Vercambre, Loic Pagès, Dominique Grasselly, Hélène Gautier, et al.. Effect of Salinity on Tomato Plant Architecture. International Symposium on High Technology for Greenhouse System Management (Greensys 2007), Oct 2007, Naples, Italy. ⟨hal-02756683⟩

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