热带雨林三种树苗叶片光合机构对光强的适应

摘要/Abstract

摘要： 对生长在不同光强(自然日光的8%,25%,50%)下西双版纳热带雨林3种木本植物团花(Anthocephalus chinensis)、玉蕊(Barringtonia pendala)和藤黄(Garcinia hanburyi)幼苗光合机构的研究表明,随着生长光强的升高,植物叶片的光饱和点、补偿点、净光合速率和非光化学猝灭系数(NPQ)升高,而表观量子效率(AQY)、有效光化学量子产量(Fv'/Fm')、光化学猝灭系数(qP)下降.在抗氧化系统中,超氧化物歧化酶(SOD)、抗坏血酸过氧化酶(APX)活性随着光强的升高而升高,而过氢化物酶(CAT)活性与生长光强的变化不一致.抗坏血酸(AsA)含量随着光强的升高而急剧上升,最能反映PFD的变化.可以认为,除与叶黄素循环有关的热耗散增大之外,植物叶片抗氧化系统的加强也是响应强光的一种保护措施.

关键词: 生长光强, 光合特性, 保护酶, 热带木本植物幼苗, 不透水面, 遥感, 纽约, 上海, 遥感生态指数

Abstract: The photosynthetic characteristics and protective role of leaf antioxidant systems were studied for seedlings of three woody species, Anthocephalus chinensis,Barringtonia pendala,Garcinia hanburyi, acclimated to 8%, 25%, 50% of natural sunlight for four months. As growth irradiance increased, the saturation points,the light compensation points of photosynthesis,the maximum net photosynthetic rate,and the non-photochemical quenching efficiency of three species were increased, while the apparent quantum yield (AQY), the effective quantum efficiency (Fv'/Fm'), and the photochemical quenching efficiency (qP) were decreased.In protective enzymes systems, SOD and APX activities increased with increasing growth irradiance, but CATactivity was not consistent with PFD. As Aexhibited the most dramatic increase in response to growth irradiance. It could be concluded that besides the increase in xanthophyll cycle-dependent energy dissipation, the enhancement of leaf antioxidants was also a protective pathway against high light intensity.

Key words: Growth irradiance, Photosynthetic characteristics, Protective enzymes, Tropical woody plant seedlings, remote sensing based ecological index (RSEI), Shanghai, impervious surface, remote sensing, New York

中图分类号:

Q945.11

蔡志全, 曹坤芳, 冯玉龙, 冯志立. 热带雨林三种树苗叶片光合机构对光强的适应[J]. 应用生态学报, 2003, (4): 493-496.

CAI Zhiquan, CAO Kunfang, FENG Yulong, FENG Zhili . Acclimation of foliar photosynthetic apparatus of three tropical woody species to growth irradiance[J]. Chinese Journal of Applied Ecology, 2003, (4): 493-496.

参考文献

[1] Abderson JV, Chevone BI, Hess JL. 1992. Seasonal variation in the antioxidant system of Eastern white pine needles.Plant Physiol,98:501～508
[2] Arnon DI. 1976.Copper enzymes in isolated polyphenol oxidase in Beta vulgaris.Planta,24:1～15
[3] Cai K-Z (蔡昆争), Luo S-M (骆世明).1999. Effects of shading on growth, development and yield formation of rice.Chin J Appl Ecol(应用生态学报),10(2):193～196 (in Chinese)
[4] Chazdon RL, Fetcher N. 1984. Light environments of tropical forest. In: Medina E,Mooney HA eds.Physiological Ecology of Plants of the Wet Tropics.The Hague: W.Junk,Publishers.27～36
[5] Chazon RL.1992. Photosynthetic plasticity of two rain forest shrubs across natural gap transects.Oecologia,92:586～595
[6] Chow WS, Luping Q, Goodchild DJ,et al.1988. Photosynthetic acclimation of Alocasia macrorrhiza (L.) G.Don to growth irradiance: structure, function and composition of chloroplasts.Aust J Plant Physiol,15(1～2):107～122
[7] Demmig-Adams B, Adams WW III .1992. Photoprotection and other responses of plants to high light stress.Ann Rev Plant Physiol Plant Mol Biol,43:599～626
[8] Foyer CH, Dujardyn M, Lemoine Y.1989. Responses of photosynthesis and the xanthophyll and ascorbate-glutathione cycles to changes in irradiance, photoinhibition and recovery.Plant Physiol Biochem,27:751～760
[9] Genty B, Briantais JM, Baker NR. 1989. The relationship between the quantum yield of photosynthetic electron transport and quenching of chlorophyll fluorescence.Biochim Biophys Acta,990:87～92
[10] Giannopolitis CN, Ries SK.1977. Superoxide dismutase I. Occurrence in higher plants.Plant Physiol,59:309～315
[11] Gillham DJ, Dodge AD. 1987. Chloroplast peroxide and hydrogen peroxide scavenging systems from pea leaves: seasonal variations.Plant Sci,50:105～109
[12] Langeheim J, Hosmond CB, Brooks A,et al.1984. Photosynthetic response to light in seedlings of selected Amazonian and Australian rainforest tree species.Oecologia,63:215～224
[13] Liang C(梁春), Lin Z-F(林植芳), Kong G-H (孔国辉).1997. Photosynthesis-light response characteristics of subtropical tree species seedling under different irradiances.Chin J Appl Ecol(应用生态学报), 8(1):7～11(in Chinese)
[14] Logan BA, Barker DH, Demmig-Adams B,et al.1996. Acclimation of leaf carotenoid composition and ascorbate levels to gradients in the light environment within an Australian rainforest.Plant Cell Environ,19:1083～1090
[15] Mishra NP, Mishra RK, Singhal GS.1993.Changes in the activities of antioxidant enzymes during exposure of intact wheat leaves to strong visible light at different temperatures with presence of protein synthesis inhibitors.Plant Physiol,102:903～910
[16] Mishra NP,Fatma T, Singhal G. 1995. Development of antioxidative defense system of wheat seedlings in response to high light.Physiol Plant,95:77～82
[17] Nakano Y, Asada K. 1987. Purification of ascorbate peroxidase spinach chloroplasts, its inactivation in ascorbate-depleted medium and reactivation by monodehydroascorbate radicals.Plant Cell Physiol,28:131～140
[18] Neubauer E, Yamamoto HY.1992. Mehler-peroxide reaction mediates zeaxanthin formation and zeaxanthin-related fluorescence quenching in intact chloroplasts.Plant Physiol,99:13～54
[19] Niyogi KK. 1999. Photoprotection revisited: Genetic and molecular approaches.Annu Rev Plant Physiol Plant Mol Biol,50:333～359
[20] Peng C-L(彭长连),Lin Z-F(林植芳),Lin G-Z(林桂珠). 1999. Effect of light on scavenging capacity for organic free radical in leaves of four woody plants.Acta Bot Sin (植物学报),43:393～398(in Chinese)
[21] Raich JW. 1989. Seasonal and spatial variation in the light environment in a tropical Diterocarp forest and gaps.Biotropica,21:299～302
[22] Shen W-B(沈文飚), Xu L-L(徐郎莱), Ye M-B(叶茂炳),et al.1996. Study on determination of ASP activity.Plant Physiol Commun(植物生理学通讯),32(3):203～205(in Chinese)
[23] Wang H, Cao G, Prior RL. 1996. Total antioxidant capacity of fruits.J Agric Food Chem,44:701～705
[24] Woodward FI, Smith TM. 1995. Protections and measurements of the maximum photosynthetic rate, Amax, at the global scale. In:Schulze ED & Caldwell MM eds.Ecophsiology of Photosynthesis.Berlin,Heidelberg,New York:Springer.491～508
[25] Zeng S-X (曾韶西),Wang Y-R (王以柔) . 1987. Effects of cold stress on content of ascorbic acid in paddy rice seedlings.Acta Phytophysiol Sin(植物生理学报),13:363～370(in Chinese)