不同生境下木荷光合生理生態(tài)特性
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摘要：運(yùn)用LCA4 型便攜式全自動(dòng)光合測(cè)定系統(tǒng)，在自然條件下，于9月上旬的晴天里分別對(duì)林窗、林緣和林下3 種生境的木荷光合生理生態(tài)特性進(jìn)行了研究。結(jié)果表明：林窗木荷光合速率日變化呈雙峰型，有明顯的“午休”現(xiàn)象，林緣木荷呈單峰型，沒(méi)有明顯的午休現(xiàn)象，林下木荷凈光合速率在一天的大部分時(shí)間里變化不大。林下生境木荷的暗呼吸速率、胞間CO2濃度和氣孔阻力均顯著低于林緣和林窗生境，而林緣與林窗生境之間差異不顯著。３種生境木荷的光響應(yīng)曲線具有相同的變化規(guī)律，用一元二次方程能進(jìn)行較好的擬合。不同生境下及同一生境中不同時(shí)間點(diǎn)木荷的光合參數(shù)均表現(xiàn)出了與環(huán)境相適應(yīng)的變異趨勢(shì)。


關(guān)鍵詞：木荷；不同生境；日變化；光響應(yīng)；CO2響應(yīng)



Photosynthetic ecophysiological characteristics of Schima superba at different habitats

Abstract: The photosynthetic ecophysiological characteristics of Schima superba in three different habitats, i.e, canopy gap, forest edge and understory was studied by the LCA4 Portable Photosynthesis System under natural condition. The results were as follows: The curve of net photosynthetic rate(Pn) in canopy gap leaves had two peaks, which had an obvious decline of photosynthetic efficiency at noon, while it was only one peak in forest edge leaves, but Pn of understory leaves did not have great changes during the whole day. The mean value of daily photosynthetic parameters in the leaves of S. superba, such as internal CO2 concentration, stomatal resistance and dark respiration rate were differences at different habitats, the understory leaves were far below others, but there was not significant differences between canopy gap leaves and forest edge leaves. The curves of photoresponse had the same trends among three habitats, they could be better fit for quadratic equation with one unknown. Photosynthetic parameters of S.superba in different habitats at different time or in the same habitat at different time showed that S. superba has variation trends to adapt to the environment.

Key words: Schima superba; different habitats; diurnal variation; photoresponse; CO2 response




目 錄

1．引言……………………………………………………………………………………1
2．材料與方法……………………………………………………………………………2
3. 結(jié)果與分析……………………………………………………………………………4
3.1 環(huán)境因子日變化 ………………………………………………………………………4
3.2 光合特性日變化 ………………………………………………………………………5
3.2.1 光合速率日變化 ……………………………………………………………………5
3.2.2 胞間CO2濃度日變化 ………………………………………………………………5
3.2.3 暗呼吸速率日變化 …………………………………………………………………5
3.2.4 氣孔阻力日變化 ……………………………………………………………………5
3.3 不同生境木荷光合參數(shù)的變化 …………………………………………………………7
3.3.1 光響應(yīng) ………………………………………………………………………………7
3.3.2 CO2響應(yīng) ……………………………………………………………………………9
4. 討論 ……………………………………………………………………………………9
5. 參考文獻(xiàn) ………………………………………………………………………………10




參考文獻(xiàn)：
[16] Carter G, Smith W K. Microhabitat comparisons of transpiration and photosynthesis in three subalp ine conifers[J]. Can. J. B ot., 1988, 66: 963～969.
[17] Chazdon R L, Pearcy R W. Photosynthetic responses to light variation in rain forest species I. Introduction under constant and fluctuating light conditions[J]. Oecologia, 1986, 69: 517～523.
[18] Chazdon R L. Photosynthetic plasticity of two rain forest shrubs across natural gap transects[J]. Oecologia, 1992, 92:586～595.
[19] Nobel P S. Biophysical Plant Physiology and Ecology[M].United States of America :W. H. Freeman and Company SanFrancisco, 1983, 434～446.
[20] 郭曉云,楊允菲,李建東.松嫩平原不同旱地生境蘆葦?shù)墓夂咸匦匝芯縖J ].草業(yè)學(xué)報(bào), 2003, 12(3): 16～21.
[21] 金則新,柯世省.云錦杜鵑葉片光合作用日變化特征[J].植物研究,2004,24(4):447～452.
[22] 郭志華,張宏達(dá),李志安,等.鵝掌楸(Liriodendron chinense)苗期光合特性研究[J].生態(tài)學(xué)報(bào),1999,19(2):164～169.
[23] Berry J A, Downton W J S. Photosynthesis. Vol Ⅱ: Development, carbon metabolism and plant productivity [M ]. Academic Press, New York: 1982. 26～31.
[24] 金則新,柯世省.浙江天臺(tái)山七子花群落主要植物種類的光合特性[J].生態(tài)學(xué)報(bào),2002 ,22(10):1645～1652.
[25] 柯世省,金則新,陳賢田.浙江天臺(tái)山七子花等6 種闊葉樹光合生態(tài)特性[J].植物生態(tài)學(xué)報(bào),2002,26(3):363～371.