大庆地区6种委陵菜生长末期的生理指标变化

在自然降温过程中,以大庆地区委陵菜、蔓委陵菜、伏委陵菜、蒿叶委陵菜、光叉委陵菜、鹅绒委陵菜为试验材料,对叶片中的过氧化物酶(POD)、过氧化氢酶(CAT)、硝酸还原酶(NR)的活性及丙二醛(MDA)、脯氨酸(Pro)、可溶性糖的含量等指标进行了研究。结果表明,随着温度的逐渐降低,光叉委陵菜中POD活性最小,NR活性波动最大。鹅绒委陵菜中可溶性糖的含量在6种委陵菜中波动最小,Pro含量最低,委陵菜中MDA含量波动范围最大,蒿叶委陵菜中CAT活性最低,POD活性最高。

Physiological Indexes Variation of 6 kinds of Potentilla chinensis at the End of Growth in Daqing Area

In the process of natural cooling, the activities of peroxides （POD）, catalase （CAT）, nitrate reductase（ NR）, and the content of malondialdehyde （ MDA）, proline （Pro） and soluble sugar were studied based on 6 kinds of experimental materials such as Potentilla chinensis, PotentiUa flagellaris, PotentiUa paradoxa, Potentilla tanacetifolia, Potentilla bifurca, and PotentiUa artsrina in Daqing area. The results showed that the activities of POD in the Potentilla bifurcais are the least while the fluctuation scope of activities of NR in the Potentilla bifurca is higher than others, with the temperature getting lower. Among them, the content of soluble sugar in Potentilla anserina fluctuates least and it has the least Pro. The fluctuation scope of cor/tent of MDA in the Potentilla chinensis is superior to others. The activities of CAT are mini- mum but that of POD operate at their most efficient.