高寒植物群落优势种光合日变化及其与环境因子的关系

doi:10.7522/j.issn.1000-694X.2018.00071

摘要/Abstract

摘要： 为分析不同高寒植物群落优势种的光合特性，探究影响光合作用的主要环境因子，选择若尔盖高原同纬度同海拔的沼泽湿地、湿草甸和干草甸样地，对比研究典型植物群落优势种木里苔草（Carex muliensis）、四川嵩草（Kobresia setchwanensis）和垂穗披碱草（Elymus nutans）光合日变化。结果表明：（1）由于水分条件差异显著（P<0.05），沼泽湿地优势种木里苔草的净光合速率（P_n）日变化呈单峰趋势，而湿草甸和干草甸优势种P_n则为双峰曲线，存在光合“午休”现象。（2）水分利用效率（WUE）日均值表现为干草甸优势种 > 湿草甸优势种 > 沼泽湿地优势种；各群落优势种光能利用效率（LUE）日均值无显著差异。（3）沼泽湿地优势种P_n主要受光合有效辐射（PAR）、气温（T_a）和空气相对湿度（RH）的影响；干草甸T_a和PAR为主要环境因子，湿草甸影响优势种P_n的主导因素为PAR。

关键词: 若尔盖, 净光合速率, 环境因子, 通径分析

Abstract: In order to analyze the photosynthetic characteristics of dominant species in different alpine plant communities and explore the main environmental factors which affect the photosynthesis, three communities, swamp, wet meadow and dry meadow, were selected at the same latitude and altitude in the Zoige Plateau, and photosynthetic diurnal changes of their dominant species, Carex muliensis, Kobresia setchwanensis and Elymus nutans were compared. The results showed that:were the main environmental affecting factors of P_n. The P_n of dominant species in dry meadow was mainly affected by T_a and PAR. The leading factor which affect P_n in wet meadow was PAR.

Key words: Zoige Plateau, net photosynthetic rate, environment factor, path analysis

中图分类号:

Q945.79

侍瑞, 苏培玺, 周紫鹃, 丁新景. 高寒植物群落优势种光合日变化及其与环境因子的关系[J]. 中国沙漠, 2019, 39(4): 46-53.

Shi Rui, Su Peixi, Zhou Zijuan, Ding Xinjing. Photosynthetic Diurnal Changes of Dominant Species in Different Alpine Plant Communities and Their Relationships with Environmental Factors[J]. Journal of Desert Research, 2019, 39(4): 46-53.

参考文献

[1] 潘瑞炽.植物生理学[M].北京:高等教育出版社,2004:56-86.
[2] Gago J,Coopman R E,Cabrera H M,et al.Photosynthesis limitation in three fern species[J].Physiologia Plantarum,2013,149(4):599-611.
[3] 刘卫国,邹杰.水盐梯度下克里雅河流域芦苇光合响应[J].西北植物学报,2014,34(3):572-580.
[4] 高丽楠.青藏高原东缘高寒草甸优势植物光合作用日变化的比较研究[D].成都:四川师范大学,2008.
[5] Chabot B F,Mooney H A.Physiological ecology of North American plant communities[J].Quarterly Review of Biology,1986,75(1):277.
[6] 卢存福,贲桂英.高海拔地区植物的光合特性[J].植物学报,1995,12(2):38-42.
[7] 朱鹏锦,尚艳霞,杨莉,等.青藏高原几种高山植物的光合生理特性[J].草业科学,2013,30(6):886-892.
[8] 李宏林,徐当会,杜国祯.青藏高原高寒沼泽湿地在退化梯度上植物群落组成的改变对湿地水分状况的影响[J].植物生态学报,2012,36(5):403-410.
[9] Anten N P R,Bastiaans L.The use of canopy models to analyze light competition among plants[M]//Hikosaka K.Canopy Photosynthesis:from Basics to Applications.Berlin,Gormany:Springer Netherlands,2016:379-398.
[10] Dieleman C M,Branfireun B A,Mclaughlin J W,et al.Climate change drives a shift in peatland ecosystem plant community:implications for ecosystem function and stability[J].Global Change Biology,2015,21(1):388-395.
[11] 苏培玺,周紫鹃,侍瑞,等.高寒草毡层基本属性与固碳能力沿水分和海拔梯度的变化[J].生态学报,2017,36(6):1570-1477.
[12] Pandey S,Kumar N,Kushwaha R.Morpho-anatomical and physiological leaf traits of two alpine herbs,Podophyllum hexandrum,and Rheum emodi,in the Western Himalaya under different irradiances[J].Photosynthetica,2006,44(1):11-16.
[13] 高丽楠,张宏,陈舒慧,等.高原2种草本植物的光合作用和叶绿素荧光参数日动态[J].四川师范大学学报(自然科学版),2015,38(4):550-560.
[14] 刘建华,闫志利,王军强.甘肃玛曲高寒天然草地优势种群及光合特征研究[J].中国农学通报,2013,29(23):140-145.
[15] 任青吉,李宏林,卜海燕.玛曲高寒沼泽化草甸51种植物光合生理和叶片形态特征的比较[J].植物生态学报,2015,39(6):593-603.
[16] Wang S Y,Zhang Y,Lü S H,et al.Biophysical regulation of carbon fluxes over an alpine meadow ecosystem in the eastern Tibetan Plateau[J].International Journal of Biometeorology,2016,60(6):801-812.
[17] Salvucci M E,Crafts-Brandner S J.Inhibition of photosynthesis by heat stress:the activation state of rubisco as a limiting factor in photosynthesis[J].Physiologia Plantarum,2004,120(2):179-186.
[18] Dias M C,Brüggemann W.Differential inhibition of photosynthesis under drought stress in Flaveria species with different degrees of development of the C₄syndrome[J].Photosynthetica,2007,45(1):75-84.
[19] 张淑勇,夏江宝,张光灿,等.黄刺玫叶片光合生理参数的土壤水分阈值响应及其生产力分级[J].生态学报,2014,34(10):2519-2528.
[20] 徐军,陈海玲,郝玉光,等.乌兰布和沙区比拉底白刺(Nitraria billardieri)的气体交换参数及抗旱生理特性[J].中国沙漠,2017,37(5):917-924.
[21] Hu Zhongming,Yu Guirui,Fu Yuling,et al.Effects of vegetation control on ecosystem water use efficiency within and among four grassland ecosystems in China[J].Global Change Biology,2008,14(7):1609-1619.
[22] 孟阳阳,刘冰,刘婵.水盐梯度下湿地柽柳(Tamarix ramosissima)光合响应特征和水分利用效率[J].中国沙漠,2018,38(3):568-577.
[23] Cowan I R.Regulation of water use in relation to carbon gain in higher plants[M]//Lange O L,Nobel P S,Osmond C B,et al.Physiological plant ecology Ⅱ:Water relations and carbon assimilation.Berlin,Germany:Springer,1982:589-613.
[24] Farquhar G D,Sharkey T D.Stomatal conductance and photosynthesis[J].Annual Review of Plant Physiology,1982,33(1):317-345.
[25] Collatz G J.Influence of certain environmental factors on photosynthesis and photorespiration in Simmondsia chinensin[J].Planta,1977,134(2):127-132.
[26] 许大全.光合作用效率[M].上海:上海科学技术出版社,2002.
[27] Granett A L,Taylor O C.Diurnal and seasonal changes in sensitivity of plants to short exposures of hydrogen chloride gas[J].Agriculture and Environment,1981,6(1):33-42.
[28] Li H Q,Zhang F W,Li Y N,et al.Seasonal and interannual variations of ecosystem photosynthetic features in an alpine dwarf shrubland on the Qinghai-Tibetan Plateau,China[J].Photosynthetica,2014,52(3):321-331.
[29] 张玮,李晓燕,李连国,等.内蒙古西部地区沙棘光合与蒸腾特性研究[J].华北农学报,2007(3):97-100.