Preserved in Portico This version is not peer-reviewed
Physiological Traits of Thirty-Five Tomato Accessions (Solanum lycopersicum L.) in Response to Low Temperature
: Received: 14 June 2021 / Approved: 15 June 2021 / Online: 15 June 2021 (09:03:49 CEST)
: Received: 17 July 2021 / Approved: 19 July 2021 / Online: 19 July 2021 (10:01:59 CEST)
A peer-reviewed article of this Preprint also exists.
Journal reference: Agriculture 2021, 11, 792
Tomato is exposure to diverse abiotic stresses. Cold stress is one of harsh environmental stresses and abnormal low temperature affects tomato growth and development including physio- logical disorders, flower drops, and abnormal fruit morphology, causing the decrease of tomato yield and a fruit quality. It is important to identify low temperature-(LT) tolerant tomato (Solanum lycopersicum L.) cultivars relying on different fruit types. This study focused on analyzing physiological traits of 35 tomato accessions with three different fruit types (cherry, medium, and large sizes) under night temperature set-points of 15°C for normal temperature (NT) and 10°C for LT, respectively. Plant heights (PH) of most tomato accessions in LT were remarkably decreased compared to those in NT. The growth of leaf length (LL) and leaf width (LW) was reduced depending on the genotypes under LT. In addition, the number of fruits (NFR), fruit set (FS), fruit yield (FY), and marketable yield (MY) were negatively affected in LT. The variation was further investigated by the correlation analysis, the principal component (PCA), and the cluster analysis. Interestingly, positive correlations between different vegetative and reproductive traits were uncovered. Multivariate analysis including the PCA and hierarchical clustering classified LT-treated 35 tomato accessions into four major groups. The identified accessions were associated with vegetative and reproductive parameters on positive directions and might be utilized for breeding programs on selecting LT-tolerant cultivars.
Tomatoes; Night low temperature; Physiological traits; Fruit yield; Tomato breeding; 28 correlation coefficients
BIOLOGY, Anatomy & Morphology
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.