Comparison of Seed Weeddispersed Characteristics between Pinus yunnanensis and Keteleeria evelyniana

doi:10.7677/ynzwyj201413178

Abstract

Abstract:

Seed morphological and winddispersed characteristics of Pinus yunnanensis and Keteleeria evelyniana were compared in this study to clarify the relationship among seed morphological, dispersal characteristics and winddispersal ability. The results showed that: 1)Seed wing loading had the greatest effect on the seed settlement velocity, but the effect of seed shape(the ratio of seed wing length to width) on it was unobvious. Seed morphological and dispersal characteristics of two species slightly influenced the horizontal dispersal distance. 2)Seed morphological characteristics(weight, length, width and seed wing area) of Pyunnanensis were significantly lower than Kevelyniana’s. 3) The ratio of seed wing length to width of Pyunnanensis was greater, and had less seed wing loading than Kevelyniana, the seed settlement velocity of Pyunnanensis (773cm·s-1) was lower than Kevelyniana’s (1169cm·s-1). Meanwhile, the seed horizontal dispersal distance(075m) under same wind speed was further than Kevelyniana’s (071m). The present study indicated that winddispersal ability of Pyunnanensis’ seed was stronger. The research results provided more knowledge to understand seed winddispersal mechanism and seed adaptation strategies in term of evolution and ecology.

Key words: Pinus yunnanensis, Keteleeria evelyniana, Wind-dispersal, Settlement velocity, Horizontal dispersal distance, Seed wing loading

CLC Number:

Q 948.1

PAN Yan, WANG Shuai, WANG Chong-Yun. Comparison of Seed Weeddispersed Characteristics between Pinus yunnanensis and Keteleeria evelyniana[J]. Plant Diversity, 2014, 36(03): 403-410.

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