马尾松菌根化苗水分胁迫生理与耐旱性研究

采用人工模拟水分胁迫方法,对马尾松菌根化和非菌根化容器苗的耐旱性进行研究,结果表明,水分胁迫可显著降低马尾松容器苗土壤中的水分含量,对菌根化苗和非菌根化苗光合色素、硝酸还原酶、丙二醛等生理物质含量、水分含量和根系活力均有显著影响。但在同等程度的水分胁迫条件下,菌根化苗所受的影响明显低于非菌根化苗,其光合能力、降低水分蒸腾能力、减轻细胞膜受损能力、根系活力和苗木含水率均高于非菌根化苗,这表明菌根化苗的耐旱性高于非菌根化苗。因此,为提高马尾松容器苗的耐旱能力和造林成活率,采用印度块菌子囊果匀浆制成的孢子悬浮液对苗木进行接种菌根处理是可行的。

Study on Physiology of Water Stress and Characteristics of Drought Tolerance in Mycorrhizal Fungi Seedlings of Pinus massoniana

In this paper, characteristics of drought tolerance in mycorrhizal fungi seedlings and uninoculated seedlings of Pinus massoniana are studied by using the artificial simulation method of water stress. By measuring the physiological indicators of chlorophyll content,the activaty of NR、MDA content,the root activity,soil moisture and leaves water content, the characteristics of drought tolerance of mycorrhizal fungi seedlings were explored. At the same time, the likely effectiveness of Pinus massoniana mycorrhizal fungi seedlings was probed under water stress.