Molecular and physiological responses to salt stress in salinity-sensitive and tolerant Hibiscus rosa-sinensis cultivars  

作　　者：Alice Trivellini Giulia Carmassi Guido Scatena Paolo Vernieri Antonio Ferrante 

机构地区：[1]Department of Agriculture,Food and Environment,University of Pisa,Pisa,Italy [2]Italian Institute for Environmental Protection and Research–ISPRA,Via del Cedro 38,57122 Leghorn,Italy [3]Department of Agricultural and Environmental Sciences,Universita Degli Studi Di Milano,Via Celoria 2,20133 Milan,Italy

出　　处：《Molecular Horticulture》2023年第1期1-18,共18页分子园艺（英文）

基　　金：funded by MIUR with PRIN 2006-2007“Physiological and molecular aspects of hormonal regulation during the post-production quality of flowering potted plants”.

摘　　要：Ornamental plants are used to decorate urban and peri-urban areas,and during their cultivation or utilisation,they can be exposed to abiotic stress.Salinity is an abiotic stress factor that limits plant growth and reduces the ornamental value of sensitive species.In this study,transcriptomic analysis was conducted to identify genes associated with tolerance or sensitivity to salinity in two hibiscus(Hibiscus rosa-sinensis L.)cultivars,‘Porto’and‘Sunny wind’.The physiological and biochemical parameters of plants exposed to 50,100,or 200 mM NaCl and water(control)were monitored.Salinity treatments were applied for six weeks.After four weeks,differences between cultivars were clearly evident and‘Porto’was more tolerant than‘Sunny wind’.The tolerant cultivar showed lower electrolyte leakage and ABA concentrations,and higher proline content in the leaves.Accumulation of Na in different organs was lower in the flower organs of‘Porto’.At the molecular level,several differential expressed genes were observed between the cultivars and flower organs.Among the highly expressed DEGs,coat protein,alcohol dehydrogenase,and AP2/EREBP transcription factor ERF-1.Among the downregulated genes,GH3 and NCED were the most interesting.The differential expression of these genes may explain the salt stress tolerance of‘Porto’.

关 键 词：FLOWER ABA Ion leakage PETALS PROLINE TRANSCRIPTOME 

分 类 号：Q37[生物学—遗传学]