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High temperature stress is one of the majorfactors limiting use of cool-season grasses in tran-sitional and warm climatic regions[1~4]. The opti-mum temperature for cool-season turfgrass ranges15~24°C for shoot growth and 10~18°C for rootgrowth[5]. However, temperatures during summermonths in these regions often exceed the optimalranges for prolonged periods. Grasses are exposedto the high temperatures over 30/25 °C (day/night) for 70 to 90 d during the summer in Shang-hai, China. Such pr… 相似文献
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