3种木本植物种子航天诱变研究初报

利用返回式卫星搭载文冠果（Xanthoceras sorbifolia）、五角枫（Acer mono）和刺槐（Robinia pseudoacacia）3种木本植物种子，返回地面后进行种子活力，以及当代生苗木叶片的色素、MDA含量和生长量的测定。结果表明：经航天诱变处理后，3种木本植物的种子活力、幼苗成苗率和成活率都明显高于对照组，其早期生长得到明显促进。和对照相比文冠果和五角枫的MDA含量呈下降趋势；而叶片色素的含量都低于对照组，刺槐和五角枫的差异在0.01水平上达到显著。3个树种诱变组第1年的生长量小于对照组，生长受到抑制作用，但从第2年开始，五角枫和文冠果的生长超过对照组，刺槐的生长速率也表现出提高的趋势，表明航天诱变处理对3种木本植物的种子活力和幼苗抗逆性有一定的促进作用。

PRELIMINARY STUDY ON SPACE MUTAGENESIS OF THREE SPECIES OF WOODY PLANTS

Dry seeds of three woody plants, Xanthoceras sorbifolia, Acer mono and Robiniap pseudoacacia, were carried into space by the return satellite for mutation breeding. The seed vigor,  leaf pigments of seedlings, MDA contents and growth volume were analyzed. Compared with the earth control, the seed vigor of three woody plants were extremely improved by space-induced mutation, the seed germination rate, planting and survival rate of seedlings were all higher than those of earth control, and the MDA contents of Xanthoceras sorbifolia and Acer mono were declined. The leaf pigments content of the trees were all lower than those of the control, specially Robinia pseudoacacia and Acer mono, which were both significantly different from their control at 0.01 levels.The growth volume of the mutation group were inhibited in the first year; however, from the second year, the growth of Xanthoceras sorbifolia and Acer mono were faster than those of control, indicating that the space mutation can promote the seed vigor and seedling resistance of three woody plants.