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运用扫描电镜对中国产的落叶松属8个种和9个不同种源的兴安落叶松种皮微形态进行了观察。结果表明,种子的背面纹饰、腹面纹饰和种孔周围纹饰截然不同。该属内两个组的种皮纹饰存在明显差异。在红杉组内,太白落叶松、红杉和怒江落叶松背、腹和种孔周围纹饰均存在不同。在落叶松组内,除了新疆落叶松外,其余种之间纹饰特征差异较小,特别是兴安落叶松、长白落叶松和华北落叶松之间差异更小。种皮纹饰特征在兴安落叶松种内基本上是稳定的,其中,背面纹饰变异幡度最小,腹面纹饰次之,种孔周纹饰变异幅度最大。
Scanning electron microscopy (SEM) was used to observe the micro-morphology of seed coat of Larix gmelinii from 8 species and 9 different provenances of Larch in China. The results showed that the back of the seeds ornamentation, ventral decoration and ornamentation around the hole completely different. There are obvious differences between the two groups of seed coat ornamentation. Within the Sequoia group, there were differences in the ornamentation of Larix taedi, Sequoia and Nujiang larch, and the ornamentation around the ventral and seeding holes. Within the larch group, except for Larix kaempferi, there is little difference in the ornamental characteristics among the other species, especially between Larix gmelinii, Larix olgensis and Larix principis-rupprechtii. The characteristics of seed coat ornamentation are basically stable in Larix gmelinii, among them, the variation of ornamentation on the back is the smallest, the ventral ornamentation is the second, and the variation of ornamentation is the largest.