International Journal of Molecular Sciences, Год журнала: 2024, Номер 25(18), С. 9926 - 9926

Опубликована: Сен. 14, 2024

The maritime pine (Pinus pinaster Ait.) is a highly valuable Mediterranean conifer. However, recurrent drought events threaten its propagation and conservation. P. populations exhibit remarkable differences in tolerance. To explore these differences, we analyzed stem transcriptional profiles of grafts combining genotypes with contrasting responses under well-watered water-stress regimes. Our analysis underscored that tolerance mainly associated constitutively expressed genes, which vary based on genotype provenance. identified key genes encoding proteins involved water stress response, abscisic acid signaling, growth control including PHD chromatin regulator, histone deubiquitinase, the ABI5-binding protein 3, transcription factors from Myb-related, DOF NAC LHY families. Additionally, drought-tolerant rootstock could enhance sensitive scions by regulating accumulation transcripts carbon mobilization, osmolyte biosynthesis, flavonoid terpenoid metabolism, reactive oxygen species scavenging. These included galactinol synthase, CBL-interacting serine/threonine kinase 5, BEL1-like homeodomain protein, dihydroflavonol 4-reductase, 1-deoxy-D-xylulose-5-phosphate. results revealed several hub help us to understand molecular physiological response conifers. Based all above, grafting selected rootstocks promising method for propagating elite recalcitrant conifer species, such as pinaster.

Язык: Английский