五个观赏海棠品种抗旱性比较

摘要

The drought resistance of five cultivars of Chinese flowering crabapple including Royalty, Dolgo, Hopa, Pink Spires and Adams was comprehensively evaluated by subordinative function method under continous drought stress.The results of the study revealed that the retention capability of five crabapple cultivars under drought stress decreased in the order of Royalty>Hopa>Dolgo>Pink Spires>Adams.The descend range of chlorophyll content of Adams and Hopa was the minimum;the second was the Royalty;the descend range in Dolgo and Pink Spires was the maximum.The free proline accumulation was the maximum in Royalty and Adams;the second was Dolgo and Pink Spires;Hopa was the minimum.The accumulation of soluble protein in Pink Spires and Adams was the maximum and significantly higher than that in Dolgo, Royalty and Hopa.The accumulation of soluble sugar in Dolgo and Hopa was the largest;Pink Spires was the least.The accumulation of malondialdehyde in Dolgo was the highest;the second was Royalty, Hopa and Pink Spires;Adams was the least.The activity of superoxide dismutase showed as follows: Adams>Pink Spires>Royalty>Dolgo>Hopa.The activity of peroxidase showed as follows: Royalty>Hopa>Pink Spires>Dolgo>Adams.The activity of catalase in Royalty and Adam was significantly higher than that of other cultivars.The drought resistances of 5 cultivars were comprehensively evaluated by subordinative function method and their drought resistances were shown to decrease in the order of Royalty, Hopa, Pink Spires, Adams and Dolgo.%以5个观赏海棠品种王族、道格、粉手帕、粉屋顶和亚当为试材,在持续自然干旱条件下,运用隶属函数法,综合比较其抗旱性强弱.结果表明:干旱胁迫下,5个海棠品种的抗脱水能力由强到弱为:王族>粉手帕>道格>粉屋顶>亚当.亚当和粉手帕的叶绿素含量下降幅度最小;其次是王族;道格和粉屋顶的下降幅度最大.王族和亚当的游离脯氨酸积累最多,道格和粉屋顶游离脯氨酸积累次之,粉手帕积累最少;而粉屋顶和亚当的可溶性蛋白积累最多,显著高于道格、王族和粉手帕;道格和粉手帕的可溶性糖积累最多,粉屋顶最少.道格的丙二醛积累最高,王族、粉手帕和粉屋顶次之,亚当积累最少.超氧化物歧化酶活性表现为:亚当>粉屋顶>王族>道格>粉手帕;过氧化物酶活性表现为:王族>粉手帕>粉屋顶>道格>亚当;王族和亚当的过氧化氢酶活性均显著高于其他品种.隶属函数法综合评价结果表明,王族的抗旱能力最强,粉手帕、粉屋顶和亚当次之,道格最弱.