ArticleJournal of experimental botany2020
Tomato SD1, encoding a kinase-interacting protein, is a major locus controlling stem development.
Article in Journal of experimental botany, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 18 citations in OpenAlex.
- Integration of single-nuclei transcriptome and bulk RNA-seq to unravel the role of AhWRKY70 in regulating stem cell development in Arachis hypogaea L.Plant biotechnology journal · 2025Article
- Article
- Molecular breeding of tomato: Advances and challenges.Journal of integrative plant biology · 2025Review
- QTL mapping reveals candidate genes for main agronomic traits inFrontiers in plant science · 2022Article
- Regulation of tomato fruit elongation by transcription factor BZR1.7 through promotion ofHorticulture research · 2022Article
- Combined analysis of the transcriptome and metabolome provides insights into the fleshy stem expansion mechanism in stem lettuce.Frontiers in plant science · 2022Article
- The SlHB8 Acts as a Negative Regulator in Stem Development and Lignin Biosynthesis.International journal of molecular sciences · 2021Article
- Genome-wide association study reveals the genetic architecture of 27 agronomic traits in tomato.Plant physiology · 2021Article
- Using precision phenotyping to inform de novo domestication.Plant physiology · 2021Article
- Tomato SlPUB24 enhances resistance to Xanthomonas euvesicatoria pv. perforans race T3.Horticulture research · 2021Article
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Authors and funding
11 authors at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Stems serve as key determinants of plant development by connecting and supporting parts of the plant body, transporting nutrients important for long-distance communication that affect crop yield, and producing new organs. Nonetheless, studies on the regulation of stem development in crops are rather limited. Here, we found a significant correlation (P<0.001) between stem diameter (SD) and fruit size in tomato (Solanum lycopersicum). We performed a genome-wide association study and identified a novel quantitative trait locus (QTL), SDR9 (stem diameter regulator on CHROMOSOME 9), that co-localized with a gene encoding a kinase-interacting family protein (KIP), which is the most likely candidate gene related to SD (hereafter referred to as SD1). Overexpression of SD1 in thin-stem accessions resulted in increased SD. In contrast, suppressed expression of SD1 in thick-stem accessions using RNA interference exhibited the opposite effect. Further microscopic analyses showed that SD1 affected the stem diameter by controlling the size and number of secondary phloem cells. An 11-bp indel in the promoter region of SD1 that disrupts a gibberellin-responsive cis-element was linked to SD. Expression analysis revealed that SD1 was mainly expressed at the cambium of the stem and positively regulates stem development. Evolutionary analysis revealed that the thick-stem allele of SD1 was selected during the recent process of tomato improvement. Our results provide novel genetic and molecular insight into natural variation of SD in tomato and may accelerate the breeding of high yield tomato.
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