杜鹃花属植物小枝大小对小枝生物量分配及叶面积支持效率的影响: 异速生长分析

doi:10.3773/j.issn.1005-264x.2008.05.022

摘要/Abstract

摘要：

当年生小枝是多年生植物体上最活跃的部分之一, 其生物量分配是植物生活史对策研究的一个重要内容。该文采用标准化主轴估计(Standardized major axis estimation, SMA)和系统独立比较分析(Phylogenetically independent contrast analysis, PIC)的方法, 研究了杜鹃花属(Rhododendron)植物一年生小枝的大小对小枝叶片、叶柄和茎的生物量分配的影响, 以及对叶面积支持效率(即单位质量小枝支持的叶面积)的影响。结果显示: 1)小枝大小对叶片生物量分配比率的影响不显著, SMA斜率为1.040 (95%的置信区间(CI)=0.998~1.085); 但是, 小枝越大, 叶柄生物量分配比例越高(SMA斜率为1.245, 显著大于1.0, 呈显著的异速生长关系)。2)小枝越小, 单叶面积越小(支持Corner法则), 单位质量小枝所支持的叶面积越大, 即具有较小枝条和较小叶片的物种可能具有较高的叶面积支持效率。这些结果有助于我们更好地理解亲缘关系十分接近的杜鹃花属植物, 在不同生境条件下叶片大小的差异, 以及为什么在胁迫生境条件下小叶物种更为常见。

关键词: 小枝, 生物量分配, 叶面积, 异速生长, 杜鹃花属

Abstract:

Aims Current-year shoots (twigs) are the most active compartment in plants. Biomass allocation within twigs is an important parameter categorizing plant life history strategies. Our objective was to explain variation in leaf size among habitats and why small-leaved species are more likely to be seen in severe habitats than large-leaved species.

Methods Effects of twig size on biomass allocation among lamina, stem, and petiole and on lamina supporting efficiency were estimated using standardized major axis estimation. Correlation between parameters was examined using the phylogenetically independent comparative method.

Important findings Fractional lamina mass was found to be independent of twig size, but allometric relationships were found between stem mass and petiole mass and between lamina area and stem mass. Petiole mass increased disproportionally with stem mass, while lamina area failed to keep pace with the increase in stem mass. Species with smaller twigs and smaller leaves may be advantageous in lamina area supporting efficiency over their counterparts.

Key words: twig, biomass allocation, lamina area, allometric scaling, Rhododendron

李亚男, 杨冬梅, 孙书存, 高贤明. 杜鹃花属植物小枝大小对小枝生物量分配及叶面积支持效率的影响: 异速生长分析. 植物生态学报, 2008, 32(5): 1175-1183. DOI: 10.3773/j.issn.1005-264x.2008.05.022

LI Ya-Nan, YANG Dong-Mei, SUN Shu-Cun, GAO Xian-Ming. EFFECTS OF TWIG SIZE ON BIOMASS ALLOCATION WITHIN TWIGS AND ON LAMINA AREA SUPPORTING EFFICIENCY IN RHODODENDRON: ALLOMETRIC SCALING ANALYSES. Chinese Journal of Plant Ecology, 2008, 32(5): 1175-1183. DOI: 10.3773/j.issn.1005-264x.2008.05.022

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链接本文: https://www.plant-ecology.com/CN/10.3773/j.issn.1005-264x.2008.05.022

https://www.plant-ecology.com/CN/Y2008/V32/I5/1175

图/表 3

参考文献 28

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物种 Species	小枝茎干重 TSM (mg)	总叶面积 TLA (mm²)	单叶面积 ILA (mm²)	总叶片干重 TLM (mg)	总叶柄干重 TPM (mg)
长毛杜鹃 R. trichanthum	428.31	4 145.04	540.66	334.09	14.86
纯红杜鹃 R. sperabile	2 234.93	10 712.46	1 438.99	1 775.71	122.49
大白杜鹃 R. decorum	2 313.00	14 766.36	1 703.81	1 595.44	104.11
大王杜鹃 R. rex	9 305.93	38 236.95	9 559.24	7 484.59	752.04
杜鹃 R. simisii	416.98	5 181.89	370.13	303.65	15.98
多鳞杜鹃 R. polylepis	660.19	6 849.21	1 208.68	575.97	16.64
繁花杜鹃 R. floribundum	1 915.78	14 821.07	2 615.48	1 552.11	73.11
贵州杜鹃 R. guizhouense	323.36	4 607.29	476.62	227.36	17.02
亮鳞杜鹃 R. heliolepis	1 179.60	6 580.64	897.36	762.05	42.38
芒刺杜鹃 R. strigillosum	1 369.04	8 812.61	862.10	965.82	51.93
红棕杜鹃 R. rubiginosum	753.49	6 268.57	924.87	572.71	34.94
白面杜鹃 R. zaleucum	485.58	5 957.94	552.80	368.91	15.13
亮叶杜鹃 R. vernicosum	1 205.10	8 607.69	1 156.26	763.88	34.99
秀雅杜鹃 R. concinnum	494.10	5 257.71	498.10	316.10	16.43
团叶杜鹃 R. orbiculare	1 564.11	8 553.17	2 025.75	1 070.78	76.67
锈叶杜鹃 R. siderophyllum	373.30	4 819.46	619.65	307.08	10.41
白花杜鹃 R. mucronatum	297.61	3 955.59	378.73	228.17	7.50
亮毛杜鹃 R. microphyton	707.71	6 981.12	343.33	490.38	26.27
黄花杜鹃 R. lutescens	653.87	7 554.14	607.03	488.87	20.20
基毛杜鹃 R. rigidum	300.90	3 174.57	519.48	215.46	9.90
喇叭杜鹃 R. discolor	3 076.69	29 336.45	3 826.49	2 809.13	180.47
露珠杜鹃 R. irroratum	801.50	6 888.55	984.08	662.17	31.67
卵叶杜鹃 R. callimorphum	439.11	2 650.12	795.04	289.11	20.78
毛肋杜鹃 R. augustinii	499.40	4 568.37	1 054.24	396.29	11.63
美容杜鹃 R. calophytum	5 317.67	34 026.13	4 138.31	4 449.56	327.22
岷江杜鹃 R. hunnewellianum	919.09	6 745.44	979.18	760.98	42.31
绒毛杜鹃 R. pachytrichum	614.34	5 893.25	1 359.98	514.67	27.78
三花杜鹃 R. triflorum	317.60	3 105.80	522.47	211.10	9.83
山光杜鹃 R. oreodoxa	1 025.89	7 300.52	1 602.55	753.89	51.56
山育杜鹃 R. oreotrephes	570.23	4 782.49	1 049.82	405.23	20.79
问客杜鹃 R. ambiguum	589.35	5 137.93	983.86	472.46	23.57
腺果杜鹃 R. davidii	2 058.29	10 605.31	1 871.53	1 440.96	96.18
羊踯躅 R. molle	1 174.23	14 161.85	1 191.18	976.34	31.01
银叶杜鹃 R. argyrophyllum	1 481.67	8 624.79	1 584.15	1 215.78	54.78
云南杜鹃 R. yunnanense	314.46	4 656.43	453.06	232.52	11.85
粘毛杜鹃 R. glischrum	1 991.96	20 577.51	3 494.29	1 729.51	123.18
紫花杜鹃 R. amesiae	426.87	4 129.78	387.17	275.98	14.76
绿点杜鹃 R. searsiae	929.90	7 199.81	1 045.13	703.46	28.24
粉白杜鹃 R. hypoglaucum	1 463.19	6 621.11	876.32	802.30	50.86
极多花杜鹃 R. pleistanthum	777.86	5 982.46	464.16	465.86	24.64
峨眉银叶杜鹃 R. argyrophyllumssp.omeiense	1 078.39	7 058.49	1 411.70	877.28	33.17
疏花美容杜鹃 R. calophytumvar. pauciflorum	967.02	5 518.63	814.22	731.35	49.02

物种 Species	小枝茎干重 TSM (mg)	总叶面积 TLA (mm²)	单叶面积 ILA (mm²)	总叶片干重 TLM (mg)	总叶柄干重 TPM (mg)
长毛杜鹃 R. trichanthum	428.31	4 145.04	540.66	334.09	14.86
纯红杜鹃 R. sperabile	2 234.93	10 712.46	1 438.99	1 775.71	122.49
大白杜鹃 R. decorum	2 313.00	14 766.36	1 703.81	1 595.44	104.11
大王杜鹃 R. rex	9 305.93	38 236.95	9 559.24	7 484.59	752.04
杜鹃 R. simisii	416.98	5 181.89	370.13	303.65	15.98
多鳞杜鹃 R. polylepis	660.19	6 849.21	1 208.68	575.97	16.64
繁花杜鹃 R. floribundum	1 915.78	14 821.07	2 615.48	1 552.11	73.11
贵州杜鹃 R. guizhouense	323.36	4 607.29	476.62	227.36	17.02
亮鳞杜鹃 R. heliolepis	1 179.60	6 580.64	897.36	762.05	42.38
芒刺杜鹃 R. strigillosum	1 369.04	8 812.61	862.10	965.82	51.93
红棕杜鹃 R. rubiginosum	753.49	6 268.57	924.87	572.71	34.94
白面杜鹃 R. zaleucum	485.58	5 957.94	552.80	368.91	15.13
亮叶杜鹃 R. vernicosum	1 205.10	8 607.69	1 156.26	763.88	34.99
秀雅杜鹃 R. concinnum	494.10	5 257.71	498.10	316.10	16.43
团叶杜鹃 R. orbiculare	1 564.11	8 553.17	2 025.75	1 070.78	76.67
锈叶杜鹃 R. siderophyllum	373.30	4 819.46	619.65	307.08	10.41
白花杜鹃 R. mucronatum	297.61	3 955.59	378.73	228.17	7.50
亮毛杜鹃 R. microphyton	707.71	6 981.12	343.33	490.38	26.27
黄花杜鹃 R. lutescens	653.87	7 554.14	607.03	488.87	20.20
基毛杜鹃 R. rigidum	300.90	3 174.57	519.48	215.46	9.90
喇叭杜鹃 R. discolor	3 076.69	29 336.45	3 826.49	2 809.13	180.47
露珠杜鹃 R. irroratum	801.50	6 888.55	984.08	662.17	31.67
卵叶杜鹃 R. callimorphum	439.11	2 650.12	795.04	289.11	20.78
毛肋杜鹃 R. augustinii	499.40	4 568.37	1 054.24	396.29	11.63
美容杜鹃 R. calophytum	5 317.67	34 026.13	4 138.31	4 449.56	327.22
岷江杜鹃 R. hunnewellianum	919.09	6 745.44	979.18	760.98	42.31
绒毛杜鹃 R. pachytrichum	614.34	5 893.25	1 359.98	514.67	27.78
三花杜鹃 R. triflorum	317.60	3 105.80	522.47	211.10	9.83
山光杜鹃 R. oreodoxa	1 025.89	7 300.52	1 602.55	753.89	51.56
山育杜鹃 R. oreotrephes	570.23	4 782.49	1 049.82	405.23	20.79
问客杜鹃 R. ambiguum	589.35	5 137.93	983.86	472.46	23.57
腺果杜鹃 R. davidii	2 058.29	10 605.31	1 871.53	1 440.96	96.18
羊踯躅 R. molle	1 174.23	14 161.85	1 191.18	976.34	31.01
银叶杜鹃 R. argyrophyllum	1 481.67	8 624.79	1 584.15	1 215.78	54.78
云南杜鹃 R. yunnanense	314.46	4 656.43	453.06	232.52	11.85
粘毛杜鹃 R. glischrum	1 991.96	20 577.51	3 494.29	1 729.51	123.18
紫花杜鹃 R. amesiae	426.87	4 129.78	387.17	275.98	14.76
绿点杜鹃 R. searsiae	929.90	7 199.81	1 045.13	703.46	28.24
粉白杜鹃 R. hypoglaucum	1 463.19	6 621.11	876.32	802.30	50.86
极多花杜鹃 R. pleistanthum	777.86	5 982.46	464.16	465.86	24.64
峨眉银叶杜鹃 R. argyrophyllumssp.omeiense	1 078.39	7 058.49	1 411.70	877.28	33.17
疏花美容杜鹃 R. calophytumvar. pauciflorum	967.02	5 518.63	814.22	731.35	49.02