Morphological adaptability of clonal herb Iris japonica to changed light condition

Abstract

Abstract: The morphological response of clonal herb Iris japonica to different light conditions was studiedin the gap. edge and understory within both bamboo forest and mixed needle-broadleaved forestin Mt. Jinyun of Sichuan. Statistic analyses indicate that the plant showed an adaptive changein morphology under different light habitats. From gap to edge and to understory, the heightand density of ramets were reduced with decreasing light intensity, and while the opposite wastrue for the length of rhizomes and internedes. The number of leaves and the diameter of rhizomes had no significant difference in different plots and habitats, but the direction of leaveswas strongly related to the direction of sun-light. showing a strong phototaxis. In addition, theplasticity of Iris japonica was analyzed and discussed in this paper.

Key words: Iris japonica, Clonal plant, Morphological adaptability

Ma Wanli, Zhong Zhangcheng. Morphological adaptability of clonal herb Iris japonica to changed light condition[J]. Chinese Journal of Applied Ecology, 1998, 9(1): 23-26.

References

[1] 王宏年.1988.生物统计学.兰州:兰州大学出版社.

[2] 王显生等.1992.羊草种群无性系生长格局的研究.植物生态学与地植物学学报.16(3):234～2d2.

[3] 王显生.1993.羊草种群无性系种群动态的初步研究.生态学报,13(4):291～299.

[4] 王显生.1994.关于无性系植物种群整合作用研究的现状及应用前景.生态学杂志,13(2):57～60.

[5] 朱志红等.1994.不同放牧强度下矮满草无性系分株种群的动态与调节.生态学报.14(1):40～45.

[6] 钟章成.1992.常绿阔叶林生态系统研究.重庆:西南师范大学出版社.

[7] 祝宁.1994.刺五加构筑型研究.植物种群和生态学研究现状与进展.69～73.

[8] 奚为民等.1993.四川缙云山森林群落林窗边缘效应的研究.植物生态学与地植物学学报,17(5):232～245.

[9] 黑龙江大兴安岭森林调查队.1978.森林调查手册.北京:农业出版社,SO～52.

[10] J . W . Silvertown(祝宁等译). 1982.植物种群生态学导论.哈尔滨:东北林业大学出版社.170～188.

[11] Bartlett. N. R. end Noble. J. C.1985. The population biology of plant with clonal growth .Analysis of tiller mortality in Carer arenaria . J . Ecol.,73:1～10.

[12] Bell, A. D.,Tomlinson. P. B. 1980. Adaptive archi-Lecture in }hizomatous plants. Bot.J. Lm. Soc.,80:125～160.

[13] Cain, M . L.1994. Consequences of foraging in clonal plant species. Ecology, 75:933～944.

[14] Cook, R. E. 1983. Clonal plant populations. Amers-can Scientist, 71:244～253.

[15] Dong, M. 1993. Morphological plasticity of the clonel herb Larniastrmn galeobdnlon in response to partialshading. New Phytologirt. 124:291～300.

[16] Dong. M.,de Kroon, H. 1994. Plasticity in mor～phology and biomess allocation in cynodon dectylon, agrass species forming stolons and rhizomes. Oikos,70:99～106.

[17] Hutchings, M. J.,Bradbruy, I. K. 1986. Ecological perspectives on clonal perennial herbs. Bioxieau,36;178～182.

[18] Lovett, L.1987. Population dynamics and clonal spe-cialization in a clonal perennial (Ranunculus repe>es)[Q . Responses to light and nutrient supply. J,Ecol.,75:555～568.

[19] Noble. ] . C.,Bell A. D. and Happer. J. L.1979. The population biology of plants with clonal growth I. The morphology and structural demography of Carer

[20] Harper. J. L. 1978. The demography of plants with clonal growth. Woldendrop(eds).Structure and Functioning of Plant Population. North-Holland,Amsterdam, 27～48.

[21] Slade. A.J.,Hutchings, M. J.19876. The effects of light intensity on foraging in the clonal herb Glecho}ea

[22] Slade. A.J..Hutchings, M. J. 1987c. Clonsl integta-lion and plasticity in foraging behaviour in Glechoma hederacea .J .,Ecol.,7:1023～1036.