Morphological Characterization of Root System Architecture in Diverse Tomato Genotypes during Early Growth

Abstract

Plant roots exploit morphological plasticity to adapt and respond to different soil environments. We characterized the root system architecture of nine wild tomato species and four cultivated tomato (Solanum lycopersicum L.) varieties during early growth in a controlled environment. Additionally, the root system architecture of six near-isogenic lines from the tomato ‘Micro-Tom’ mutant collection was also studied. These lines were affected in key genes of ethylene, abscisic acid, and anthocyanin pathways. We found extensive differences between the studied lines for a number of meaningful morphological traits, such as lateral root distribution, lateral root length or adventitious root development, which might represent adaptations to local soil conditions during speciation and subsequent domestication. Taken together, our results provide a general quantitative framework for comparing root system architecture in tomato seedlings and other related species.

An auxin‐mediated regulatory framework for wound‐induced adventitious root formation in tomato shoot explants

“…We previously studied several traits of the AR system in wholeroot excised shoot explants in different tomato cultivars (Alaguero-Cordovilla, Gran-Gómez, Tormos-Moltó, & Pérez-Pérez, 2018). AR emergence was significantly delayed (p-value = .000) in the 'Micro-Tom' cultivar when compared to that of the other studied cultivars Auxin produced in the cotyledons also contributes to the growth of young leaves.…”

Auxin-Induced Adventitious Root Formation in Nodal Cuttings of Camellia sinensis

“…Furthermore, BRs were reported to be closely correlated with auxin growth responses like gravitropic response and lateral root formation [31,32]. In tomato, the primary roots of bushy mutants were much shorter than their counterparts in the “Micro-Tom” background, which were correlated with the internal BR contents [33]. In tea cuttings, IBA treatment strongly induced four bHLH135 genes, which were potentially involved in BR signaling [15,34].…”

Bioinspired Optimization of Germination Nutrients Based on Lactuca sativa Seedling Root Traits as Influenced by Seed Stratification, Fortification and Light Spectrums

“…The complexity of root phenotyping involves open-field, partially controlled greenhouse, and controlled environment agriculture in generating throughout necessary for plant breeding, genomics, and agricultural intensification (Falk et al, 2020). Morpho-agronomical characterization of root architecture has been carried out on wheat (Tomar et al, 2016), wild lettuce (L. serriola) (Fu et al, 2017), oilseed rape (Brassca napus) (Shi et al, 2013), rice (Oryza sativa L.) (Wang et al, 2020), pea (Pisum sativum L.) and melon (Cucumis melo L.) (Solano, Hernández, Suardíaz, & Barba-Espín, 2020), thale cress (Arabidopsis thaliana) (Iglesias et al, 2019;Moore et al, 2013), common bean (Phaseolus vulgaris) (Strock et al, 2019), tomato (Solanum lycopersicum L.) (Alaguero-Cordovilla, Gran-Gómez, Tormos-Moltó, & Pérez-Pérez, 2018), and corn (Zea mays) (Ghorchiani, Etesami, & Alikhani, 2018). Some seeds have a dormancy stage and cold stratification can trigger the seed membrane and promote germination.…”