Rose is the most economically important ornamental plant. However, cold stress seriously affects survival and regrowth of garden roses in northern regions. Cold acclimation was studied using two genotypes (Rosa wichurana R. hybrida ‘Yesterday’) selected from a rose breeding program. During winter season (November to April), hardiness stems, soluble sugar content, expression dehydrins related ke...

The study of the regulatory mechanism exogenous plant growth regulators (PGRs) on relevant physiological indicators is essential to maintain normal Rosa hybrida under high-temperature conditions. photosynthetic and characteristics ornamental cut rose ‘Carolla’ high temperature were studied by spraying leaves with various concentrations salicylic acid (SA; 0.5, 1.0, 1.5, or 2.0 mmol·L−1), 6-benz...

Abstract Roses ( Rosa hybrida ) are a highly merchandised flower but lack blue varieties. Overexpression of the flavonoid 3′,5′-hydroxylase F3′5′H gene can increase accumulation pigment (delphinidin anthocyanin). However, sometimes effect alone is inadequate for producing flowers. Furthermore, internal environment cell, such as an in pH, also help conversion anthocyanins to pigments. Nonetheles...