Download the new version for apple Pathway12/28/2023 ![]() (2020) Transcription profiles reveal sugar and hormone signaling pathways mediating tree branch architecture in apple ( Malus domestica Borkh.) grafted on different rootstocks. Overall, this study provides a framework for analysis of the molecular mechanisms underlying differential tree branch growth of apple trees grafted on different rootstocks.Ĭitation: Chen Y, An X, Zhao D, Li E, Ma R, Li Z, et al. The screened data suggested that sugar metabolism-related genes and complex hormone regulatory networks involved the auxin (IAA), cytokinin (CK), abscisic acid (ABA) and gibberellic acid (GA) pathways, as well as several transcription factors, participated in the complicated growth induction process. In total, 3610 differentially expressed genes (DEGs) were identified through pairwise comparisons. Transcriptomic profiles of the tender leaves adjacent to the top buds allowed us to identify genes that were potentially involved in signaling pathways that mediate the regulatory mechanisms underlying growth differences. The results showed that the sugar content, sugar metabolism-related enzyme activities, and hormone content all presented obvious differences in the tender leaves and buds of apple trees grafted on these rootstocks. The VR trees presented the biggest branch architecture. ![]() In this study, the branch growth phenotypes of three combinations of ‘ Fuji’ apple trees grafted on different rootstocks (VR: Malus baccata DIR: Malus baccata/T337 DSR: T337) were investigated. ![]() Apple trees grafted on different rootstock types, including vigorous rootstock (VR), dwarfing interstock (DIR), and dwarfing self-rootstock (DSR), are widely planted in production, but the molecular determinants of tree branch architecture growth regulation induced by rootstocks are still not well known. ![]()
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