高温胁迫对北美海棠‘金吉丽’和‘特丽’的生理指标影响

Effect of Heat Stress on Physiological Indexes of North American Begonia ‘Jinjili' and ‘Teli'

北美海棠较湖北海棠具有更高的观赏价值,武汉夏季高温是限制北美海棠推广应用的关键因素。以北美海棠‘金吉丽’和‘特丽’为试材,以本地乡土植物湖北海棠为对照,经过1周35℃高温处理,测定海棠叶片的抗性生理指标变化。结果表明:北美海棠的叶绿素含量和保护酶活性高于湖北海棠、可溶性蛋白质含量低于湖北海棠、丙二醛含量与湖北海棠相似,总体来看,北美海棠抗性生理指标变化与本地乡土植物湖北海棠抗性生理相似。结合前期的形态学研究,进一步从生理水平上佐证了这2个北美海棠品种在武汉地区能够自然生长。

North American Begonia has higher ornamental value than Malus bupebensis. However, high temperature in Wuhan summer is the limiting factor in the application of the North American study, after one week of 35℃ high temperature treatment, resistance physiological indexes changes of the North American Begonia cultivars ‘Jinjili＇ and ‘Teli＇ were tested, comparing with M. hupehensis. Results showed that chlorophyll content and protective enzyme activities were higher in the North American Begonia than that in M. hupehensis, and their soluble protein contents were lower than similar results. Overall, North American As to MDA, they showed physiological changes with local native plants M. hupehensis. Combined with previous morphological study, it was further that the two North American Begonia varieties could grow naturally in Wuhan compared confirmed