Abstract: Based on the natural climate conditions of Shanghai, and taking flowering period, maximum flower opening rate, relative conductivity, proline content, and light utilization efficiency as the indices of rose heatresistance, the heatresistance of 13 rose varieties in the field was evaluated by the methods of subordinative function analysis, principal component analysis, and hierarchical cluster analysis. Among the 13 varieties, Rosa cv. ‘Abhisarika’, Rosa cv. ‘Black Lady’, and Rosa cv. ‘Red Hat’ had most stronger heatresistance, Rosa cv. ‘Bright Smile’ and Rosa cv. ‘Lawinia’ had stronger heatresistance, Rosa cv. ‘Golden Marie’, Rosa cv. ‘Berrrcrd Buffet’, Rosa cv. ‘Shocking Blue’, Rosa cv. ‘My choice’, and Rosa cv. ‘ANITA PEREIRE’ had midlevel heatresistance, and Rosa cv. ‘Orange Wave’, Rosa cv. ‘Angela’, and Rosa cv. ‘MY KONOS’ had low level heatresistance. Rosa cv. ‘Abhisarika’ and Rosa cv. ‘Bright Smile’ were recommended to be popularized in the gardens and parks in Shanghai and JiangHuai basins.

Key words: seed germination, antioxidation capacity, ion balance., salt stress, exogenous sugar