对引自澳大利亚的班克木属5个种18个种源进行种子形态、质量以及发芽特征测定,结果表明:班克木属种子形态、质量和发芽特征在种间和种内均有不同的差异表现；香花班克木种子千粒质量最大,约106.5 g,为其他种的4～9倍；种子千粒质量与发芽率无显著相关；除红花班克木在试验期间未发芽外,其余4个种的发芽率皆高于60％,强力班克木发芽率最高,约80％；长圆叶班克木和强力班克木种子发芽速度最快,而香花班克木发芽速度最慢；发芽始期、发芽速度、发芽率、胚轴长、胚根长都和经度呈极显著正相关(P＜0.01),即自西澳的珀斯至东澳的塔斯马尼亚地区,种子的发芽始期越晚,发芽速度慢,发芽率越高,胚轴和胚根的生长量越大.对于5种班克木的发芽特征的研究表明:强力班克木在广州的适应性最强,其发芽率最高,发芽速度最快,发芽最早且胚根长度最大.%The seed morphology,seed mass and germination of 18 provenances of five Banksia species introduced from Australia were studied.The results showed that there were distinct differences in seed morphology,seed mass and germination among Banksia species.The thousand-seed-weight of B.aemula reached the maximum of 106.541g,which was approximately three to eight times heavier than that of the other species.No significant correlation was found between seed mass and germination rate.The germination rate of all Banksia species exceeded 60％,except B.coccinea which did not germinate during the experiment.The germination rate of B.robur was the highest,reaching about 80％.The germination speed of B.oblongifolia and B.robur was the fastest,whereas B.aemula was the slowest.The germination initiation,germination speed,germination rate,the length of hypocotyls and radicles were remarkably positively correlated with longitude,inferring that Banksia species introduced from west Australia germinated later and more slowly with the higher germination rate and faster growth of hypocotyls and radicles compared with that introduced from east Australia.
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