The study examined 57 global accessions of the invasive hybrid Kalanchoe xhoughtonii and its parents, revealing extensive cytogenetic and genomic variation among morphotypes but identifying a single tetraploid genotype (morphotype A) that dominates worldwide. This genotype exhibits remarkable genetic uniformity, high phenotypic plasticity, and prolific vegetative propagation, illustrating how hybridization and polyploidy can drive rapid invasive success.
Transcriptome responses of two Halophila stipulacea seagrass populations from pristine and impacted habitats, to single and combined thermal and excess nutrient stressors, reveal local adaptive features and core stress-response genes
Authors: Nguyen, H. M., Yaakov, B., Beca-Carretero, P., Procaccini, G., Wang, G., Dassanayake, M., Winters, G., Barak, S.
The study examined transcriptomic responses of the tropical seagrass Halophila stipulacea from a pristine and an impacted site under single and combined thermal and excess nutrient stress in mesocosms. Combined stress caused greater gene reprogramming than individual stresses, with thermal effects dominating and the impacted population showing reduced plasticity but higher resilience. Core stress‑response genes were identified as potential early field indicators of environmental stress.