Variation of Seed Morphology and Germination Within and Among Species of Banksia

DU Peng-zhen; SUN Bing; CHEN Yong; LIAO Shao-bo

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 106.541 g, 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.

1. Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China

Received Date: 2013-01-21

Abstract: 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 106.541 g, 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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Reference (11)

[1]	马琳, 何琳娜, 姜岩, 等. 锯叶班克木Banksia serrata外植体的选择及消毒方法的研究[J]. 中南林业科技大学学报, 2011, 31(12): 133-137
[2]	Lamont B B, Klinkhamer P G L, Witkowski E T F. Population fragmentation may reduce fertility to zero in Banksia goodie-a demonstration of the Allee effect[J].Oecologia, 1993, 94:446-450
[3]	Sedgley M,Janick J. Banksia: New proteaceous cut flower crop[J]. Ornamentals,1998,9:9-21
[4]	陈华平, 翁殊斐. 澳大利亚特色园林植物——班克木[J]. 广东园林, 2011(4): 55-57
[5]	Collins K, Collins K, George A[M]. Banksias Australia: warwick Forge, 2008:32-91
[6]	续九如, 黄智慧. 林业试验设计[M]. 北京: 中国林业出版社, 1995:29-30
[7]	Vaughton G, Ramsey M. Sources and consequences of seed mass variation in Banksia marginata (Proteaceae)[J]. Journal of Ecology, 1998, 86: 563-573
[8]	Delgado J A, Serrano J M, Lopez F. Seed size and seed germination in the Mediterranean fire-prone shrub Cistus ladanifer[J]. Plant Ecology, 2008, 197:269-276
[9]	李畅, 苏家乐, 陈璐,等. 长白山区6种杜鹃花属植物种子形态及萌发特性[J]. 扬州大学学报:农业与生命科学版, 2011, 32(4): 59-63
[10]	朱念德. 植物学(形态解剖结构)[M].广州: 中山大学出版社, 2000: 179-180
[11]	刘桂丰, 杨传平, 刘关君,等. 白桦不同种源种子形态及发芽率[J]. 东北林业大学学报, 1999, 27(4): 1-4

Variation of Seed Morphology and Germination Within and Among Species of Banksia

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