Growth and photosynthetic responses of Fraxinus mandshurica seedlings to various light environments

Abstract

To determine light requirement and adaptability of Fraxinus mandshurica seedlings, the seasonal variations of photosynthetic variables were measured in 3-year-old seedlings grown under four light levels (100%, 60%, 30%, and 15% of full sunlight) with a LI-6400 portable photosynthesis system. The leaf chlorophyll content, special leaf weight, annual height and basal diameter increment of seedlings were also observed. The maximum and minimum values of net photosynthetic rate, maximum rate of carboxylation, and maximum rate of electron transport of F. mandshurica seedlings were detected with 60% and 15% of full sunlight treatments, respectively. With the decrease of light level, both light saturation point and special leaf weight significantly declined (p < 0.05), but leaf chlorophyll content significantly increased (p <0.05). Annual height and basal diameter increments of seedlings grown under 60% of full sunlight treatment were significantly greater than those of seedlings under other treatments (p < 0.05). It was concluded that F. mandshurica seedlings can adapt to a wide range of light environments from 15% to 100% of full sunlight by adjusting light saturation point, leaf chlorophyll content and special leaf weight. According to the maximum of relative growth, 60% of full sunlight treatment is the optimum light level for the growth of 3-year-old F. mandshurica seedlings.

Keywords

Fraxinus mandshurica / light adaptation / plasticity / seasonal dynamics / secondary forest

References

[1] Bernacchi C.J., Singsaas E.L., Pimentel C., Portis A.R., Long S.P.. Improved temperature response functions for models of Rubisco-limited photosynthesis. Plant, Cell & Environment, 2001, 24: 253-259.

[2] Björkman O.. Lange O.L., Nobel P.S., Osmond C.B., Ziegler H.. Responses to different quantum flux densities. Encyclopedia of Plant Physiology. 1981, New York: Springer, Berlin Heidelberg, 57 107

[3] Bloor J.M.G.. Light responses of shade-tolerant tropical tree species in north-east Queensland: a comparison of forest- and shadehouse-grown seedlings. Journal of Tropical Ecology, 2003, 19: 163-170.

[4] Chen X.W., Zhou G.S., Zhang X.S.. Spatial characteristics and change for tree species along the North East China Transect (NECT). Plant Ecology, 2002, 164: 65-74.

[5] Ding B., Shen H., Liu Q., Wang Lu.. Preliminary studies on the characters of growth and development and the method of tending thinning for Manchurian ash natural secondary forest. Journal of Northeast Forestry University, 1991, 19(4): 147-155.

[6] Duan B.L., Lu Y.W., Yin C.Y., Li C.Y.. Morphological and physiological plasticity of woody plant in response to high light and low light. Chinese Journal of Applied & Environmental Biology, 2005, 11(2): 238-245.

[7] Farquhar G.D., von Caemmerer S., Berry J.A.. A biochemical model of photosynthetic CO₂ assimilation in leaves of C₃ species. Planta, 1980, 149: 78-90.

[8] Farquhar G.D., von Caemmerer S., Berry J.A.. Models of photosynthesis. Plant Physiology, 2001, 125: 42-45.

[9] Han Y., Wang Z., Gu Jiacun.. The effects of spatial heterogeneity of understorey light availability on regeneration of Manchu rian ash. Chinese Journal of Plant Ecology, 2004, 28(4): 468-475.

[10] Kitao M., Lei T.T., Koike T., Tobita H., Maruyama Y.. Susceptibility to photoinhibition of three deciduous broadleaf tree species with different successional traits raised under various light regimes. Plant, Cell & Environment, 2000, 23: 81-89.

[11] Kramer P.J., Kozlowski T.T.. Physiology of Woody Plants. 1979, New York: Academic Press, 811.

[12] Lambers H., Poorter H., Begon M., Fitter A.H.. Inherent variation in growth-rate between higher-plants—a search for physiological causes and ecological consequences. Advances in Ecological Research. 1992, London: Academic Press, 187 261

[13] Larcher W.. Physiological Plant Ecology: Ecophysiology and Stress Physiology of Functional Groups. 2003, Germany: Springer Verlag, 513.

[14] Li Hesheng.. The Experiment Principle and Technique for Plant Physiology and Biochemistry. 2000, Beijing: Higher Education Press, 134 138

[15] McGuire J.P., Mitchell R.J., Moser E.B., Pecot S.D., Gjerstad D.H., Hedman C.W.. Gaps in a gappy forest: plant resources, longleaf pine regeneration, and understorey response to tree removal in longleaf pine savannas. Canadian Journal of Forest Research, 2001, 31: 765-778.

[16] Messier C., Bellefleur P.. Light quantity and quality on the forest floor of pioneer and climax stages in a birch — beech — sugar maple stand. Canadian Journal of Forest Research, 1988, 18: 615-622.

[17] Modrý M., Hubený D., Rejšek K.. Differential response of naturally regenerated European shade tolerant tree species to soil type and light availability. Forest Ecology and Management, 2004, 188: 185-195.

[18] Newton A.C., Allnutt T.R., Gillies A.C.M., Lowe A.J., Ennos R.A.. Molecular phylogeography, intraspecific variation and the conservation of tree species. Trends in Ecology and Evolution, 1999, 14: 140-145.

[19] Rhizopoulou S., Meletiouchristou M.S., Diamantoglou S.. Water relations for sun and shade leaves of four Mediterranean evergreen sclerphylls. Journal of Experimental Botany, 1991, 42: 627-635.

[20] Rosati A., Badeck F.W., Dejong T.M.. Estimating canopy light interception and absorption using leaf mass per unit leaf area in Solanum melongena. Annals of Botany, 2001, 88: 101-109.

[21] Sang Y., Wang C., Lang G., Zhou X., Zhao Huixun.. Photosynthetic efficiency of Fraxinus mandshurica. Journal of Northeast Forestry University, 1999, 27(2): 15-18.

[22] Utsumi Y., Sano Y., Funada R., Fujikawa S., Ohtani J.. The progression of cavitation in earlywood vessels of Fraxinus mandshurica var japonica during freezing and thawing. Plant Physiology, 1999, 121: 897-904.

[23] Wang G., Zhuang F., Zhao Junchang.. Artificial regeneration of Fraxinus mandshurica forest range of Changbai Maintain. Jinlin Forestry Science and Technology, 2006, 35(3): 13-18.

[24] Wang K., Zhu J., Yu L., Sun Y., Zhang Jinxin.. Effects of light environment on Juglans mandshurica seedlings growth and photosynthesis. Chinese Journal of Applied Ecology, 2010, 21(4): 821-826.

[25] Wang Y., Chai Y., Mu Changlong.. Study on ecology of Fraxinus mandshurica. Journal of Northeast Forestry University, 1994, 22(1): 1-6.

[26] Xia J., Zhang G., Liu J., Liu Q., Chen Jian.. Responses of photosynthetic and physiological parameters in Campsis radicans to soil moisture and light intensities. Journal of Beijing Forestry University, 2008, 30(5): 13-18.

[27] Yamamoto F., Sakata T., Terazawa K.. Physiological, morphological and anatomical responses of Fraxinus mandshurica seedlings to flooding. Tree Physiology, 1995, 15: 713-719.

[28] Zang R., Xu H., Gao Wentao.. Regeneration response of main tree species to gap size and gap development phase in the Korean pine-broadleaved forest in Jiaohe, Northeast China. Scientia Silvae Sinicae, 1999, 35(3): 2-9.

[29] Zhao H., Chai Y., Zhang Dongli.. Photosynthesis determination on some tree species and the forest management suggestions. Journal of Northeast Forestry University, 1991, 19: 284-289.

[30] Zhu J.J., Liu Z.G., Wang H.X., Yan Q.L., Fang H.Y., Hu L.L., Yu L.Z.. Effects of site preparation on emergence and early establishment of Larix olgensis in montane regions of northeastern China. New Forests, 2008, 36: 247-260.

[31] Zhu J.J., Mao Z.H., Hu L.L., Zhang J.X.. Plant diversity of secondary forests in response to anthropogenic disturbance levels in montane regions of northeastern China. Journal of Forest Research, 2007, 12: 403-416.

[32] Zhu J.J., Matsuzaki T., Lee F.Q., Gonda Y.. Effect of gap size created by thinning on seeding emergency, survival and establishment in a coastal pine forest. Forest Ecology and Management, 2003, 182: 339-354.