Tall fescue (Festuca arundinacea Schreb) and Kentucky bluegrass (Poa pratensis L.) are widely used in turf industry in the transition zone. Both of the two species have long green period in shanghai, but they could not survive in the summer well. The objectives of this study are: 1) to screen and breed heat-tolerant and non-heat tolerant genotypes for application in turf industry and study of heat tolerance mechanisms, 2) to investigate the optimal concentration of salicylic acid (S A) on thermotolerance in...