Root diversity in sesame (Sesamum indicum L.): insights into the morphological, anatomical and gene expression profiles

Su Ruqi, Zhou Rong, Mmadi Marie Ali, Li Donghua, Qin Lu, Liu Aili, Wang Jiankang, Gao Yuan, Wei Mengyuan, Shi Lisong, Wu Ziming, You Jun, Zhang Xiurong, Dossa Komivi. 2019. Root diversity in sesame (Sesamum indicum L.): insights into the morphological, anatomical and gene expression profiles. Planta, 250 : 1461-1474.

Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/bioproject/PRJNA552167

Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : Sesame provides one of the most nutritious and healthy vegetable oils, sparking an increasing demand of its seeds. However, with the low yield and productivity of sesame, there is still a huge gap between the seed demand and supply. Improving the root system has a high potential to increase crop productivity, but information on the diversity of the sesame root systems is still lacking. In this study, 40 diverse sesame varieties were grown in soil and hydroponics systems and the diversity of the root system was investigated. The results showed that sesame holds a large root morphological and anatomical diversity, which can be harnessed in breeding programmes. Based on the clustering of the genotypes in hydroponics and soil culture systems, we found that similar genotypes were commonly clustered either in the small-root or in the big-root group, indicating that the hydroponics system can be employed for a large-scale root phenotyping. Our results further revealed that the root biomass positively contributes to increased seed yield in sesame, based on multi-environmental trials. By comparing the root transcriptome of two contrasting genotypes, 2897 differentially expressed genes were detected and they were enriched in phenylpropanoid biosynthesis, starch and sucrose metabolism, stilbenoid, diarylheptanoid and gingerol biosynthesis, flavonoid biosynthesis, suggesting that these pathways are crucial for sesame root growth and development. Overall, this study sheds light on the diversity of sesame root system and offers the basis for improving root traits and increasing sesame seed yield.

Mots-clés Agrovoc : système racinaire, Sesamum indicum, amélioration des plantes, expression des gènes, génotype, rendement des cultures, racine, légume racine, phénotype, croissance, Transcription génique, rhizosphère, résistance à la sécheresse, sélection

Mots-clés géographiques Agrovoc : Chine

Mots-clés libres : Candidate genes, Phenotyping, Root morphology, Sesame, Yield improvement

Agences de financement hors UE : China Agriculture Research System, Agricultural Science and Technology Innovation Program, Chinese Academy of Agricultural Sciences

Auteurs et affiliations

• Su Ruqi, CAAS (CHN)
• Zhou Rong, CAAS (CHN)
• Mmadi Marie Ali, CAAS (CHN)
• Li Donghua, CAAS (CHN)
• Qin Lu, CAAS (CHN)
• Liu Aili, CAAS (CHN)
• Wang Jiankang, CAAS (CHN)
• Gao Yuan, CAAS (CHN)
• Wei Mengyuan, CAAS (CHN)
• Shi Lisong, CAAS (CHN)
• Wu Ziming, Jiangxi Agricultural University (CHN)
• You Jun, CAAS (CHN)
• Zhang Xiurong, CAAS (CHN) - auteur correspondant
• Dossa Komivi, CAAS (CHN) ORCID: 0000-0003-4894-6279 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/608269/)

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