Sun Jun, Wang Man Tang, Cheng Lin, Lyu Min, Sun Meng Ke, Chen Xiao Ping, Zhong Quan Lin, Cheng Dong Liang
Fujian Provincial Key Laboratory of Plant Ecophysiology, Fujian Normal University, Fuzhou 350007, China.
School of City and Civil Engineering, Zaozhuang University, Zaozhuang 277160, Shandong, China.
Ying Yong Sheng Tai Xue Bao. 2019 Jan 20;30(1):165-172. doi: 10.13287/j.1001-9332.201901.029.
To investigate the trade-off between the twig size and leaf size, we measured the total leaf mass, stem mass, individual leaf mass and leafing intensity of typical bamboo’s (Phyllostachys edulis, Indocalamus tessellatus, Oligostachyum oedogonatume, Yushania hirticaulis and Yushania wuyishanensis) twigs at different altitudes in Wuyi Mountain. The results showed that the exponents of the scaling between total leaf mass and stem mass on twigs significantly decreased with increasing altitude for all the five bamboo species. The common scaling exponents of total leaf mass vs. stem mass for P. edulis, I. tessellatus and O. oedogonatum were 0.94, 0.85 and 0.84, respectively. A common slope of 0.79 was observed in total leaf mass vs. stem mass in Y. hirticaulis and Y. wuyishanensis. There was significant negative correlation between individual leaf mass and leafing intensity among bamboo species, except Y. wuyishanensis. A common slope of -1.12 existed between individual leaf mass and leafing intensity for five bamboo species. In conclusion, bamboos at low altitudes tended to support more leaf biomass while preferring to invest more to stem biomass at high altitudes. Although the stem mass investment of different bamboo’s twig increased with altitude, the leafing intensity strategies based on stem mass were determined by the leaf size construction rather than altitude.
为了研究竹枝大小与叶片大小之间的权衡关系，我们测量了武夷山不同海拔高度下典型竹子（毛竹、箬竹、黄条金刚竹、糙花玉山竹和武夷山玉山竹）竹枝的总叶质量、茎质量、单叶质量和出叶强度。结果表明，对于所有这五种竹子，竹枝上总叶质量与茎质量之间的异速生长指数均随海拔升高而显著降低。毛竹、箬竹和黄条金刚竹总叶质量与茎质量的共同异速生长指数分别为0.94、0.85和0.84。在糙花玉山竹和武夷山玉山竹中，总叶质量与茎质量的共同斜率为0.79。除武夷山玉山竹外，竹种间单叶质量与出叶强度之间存在显著负相关。五种竹子单叶质量与出叶强度之间存在共同斜率-1.12。总之，低海拔地区的竹子倾向于支持更多的叶片生物量，而高海拔地区则更倾向于在茎生物量上投入更多。虽然不同竹子竹枝的茎质量投资随海拔升高而增加，但基于茎质量的出叶强度策略是由叶片大小构建决定的，而非海拔。
