杜英等树种对盐雾胁迫的反应及其生理特性研究

以饱和NaCl溶液模拟盐雾胁迫,对杜英等11个树种在盆栽(其中的7个树种)和离体条件下的叶片和芽进行处理,通过对盐害症状及其时间极限的观察,结合叶片叶绿素含量、游离脯氨酸含量、超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量等生理指标的测定,发现耐盐雾性的强弱依次为成熟叶组织＞嫩叶组织＞芽组织,盆栽条件下叶片耐盐雾性强于离体状况,阔叶树类耐盐雾性强于针叶树类,而7个参试树种耐盐雾性强弱的综合排序依次为杨梅＞木荷＞杜英＞二次结实板栗＞湿地松＞枫香＞马尾松.

Studies on respondent of some tree species as Elaeocarpus decipiens to stress of salt fog and its physiologi-cai characteristics.

Leaf blades of 11 species of trees, such as Elaeocarpus decipiens, on conditions of separation and pot culture, were treated with saturated solution of sodium chloride to simulate stress of salt fog. From observation of symptoms of salt damage and time limitation and determination of physiological indexes, including chlorophyll content, free proline content, SOD activity and MDA content, the results showed that the order of salt fog tolerance of different tissues was that leaf >tinder leaf >bud. Salt fog tolerance of the leaf blades cultured in pot was higher than that in vitro. Salt fog tolerance of broad leaved trees was higher than that of coniferous trees. The order of salt fog tolerance of the treated seven species of trees was that Myrica rubra > Schima superba> Elaeocarpus decipiens> Castanea mollissima cv. ercijieshibanli> Pinus elliottii Engelm> Liquidamber formosana> Pinus massoniana.