喀斯特露石生境下构树和桑树的光合特征
Photosynthetic characteristics of Broussonetia papyrifera and Morus alba under rock outcrop habitat in karst area
-
摘要: 以喀斯特适生植物构树(Broussonetia papyrifera)为研究对象,非喀斯特适生植物桑树(Morus alba)为对照,比较了不同的植物光合作用对露石生境的响应。与无露石生境相比,多露石生境土壤具有较高的水分含量和较多的有机质。分析植物光合作用的光响应曲线和二氧化碳响应曲线、叶绿素荧光参数以及叶片水势(LWP)和碳稳定同位素值(δ13C)的结果表明:不同生境下,两种植物的LWP及δ13C无显著变化;除了初始荧光参数外,同种植物的叶绿素荧光参数差异不显著;不同生境下,构树的呼吸速率和羧化效率无显著变化,而多露石生境土壤生长的桑树的呼吸速率和羧化效率明显要大于无露石生境土壤生长的;在水分亏缺下,构树以牺牲体内碳的方式来维持稳定的羧化效率,进而保持稳定的光合能力;构树比桑树对喀斯特环境有着较强的适应性。Abstract: Taking the karst-adaptable plant species, Broussonetia papyrifera as the target, and the non-karst-adaptable plant (Morus alba) as the contrast, this study compared photosynthetic responses of different plant species to rock outcrop habits. Research suggests that the soil in a rock outcrop habit has higher water content and more organic matter than that in a non-rock outcrop habit. The light response curve and carbon dioxide response curve of photosynthesis, chlorophyll fluorescence parameters, water potential (LWP) and carbon stable isotope values (δ13C) of leaves were measured. Results show that there is no significant difference in LWP and δ13C between different habitats in the two plant species, while there exists a significant difference in chlorophyll fluorescence parameters of the same plant species except for the initial fluorescence parameter (F0). The respiration rate and carboxylation efficiency (CE) of Broussonetia papyrifera do not change significantly in different habitats, while that of Morus alba growing in the soil of rock outcrop habit are significantly higher than those growing in the soil of non-rock outcrop habit. Broussonetia papyrifera can maintain stable CE at the expense of carbon in the plant, thus maintaining stable photosynthetic capacity under water deficit of a non-rock outcrop habit. The karst-adaptable plant species, Broussonetia papyrifera, is more adaptable to the karst environment than Morus alba.
-
Key words:
- karst /
- rock outcrop habitat /
- Broussonetia papyrifera /
- Morus alba /
- photosynthesis
-
[1] 王世杰.喀斯特石漠化:中国西南最严重的生态地质环境问题[J].矿物岩石地球化学通报,2003, 22(2):120-126. [2] 何才华,熊康宁.贵州喀斯特生态环境脆弱性类型区及其开发治理研究[J].贵州师范大学学报: 自然科学版,1996, 14(1): 1-9. [3] 童晓伟,王克林,岳跃民,等.桂西北喀斯特区域植被变化趋势及其对气候和地形的响应[J].生态学报,2014, 34(12): 3425-3434. [4] 王世杰,刘再华,倪健,等.中国南方喀斯特地区碳循环研究进展[J].地球与境,2017, 45(1): 2-9. [5] 苏维词,杨汉奎.贵州岩溶区生态环境脆弱性类型的初步划分[J].环境科学研究,1994, 7(6): 35-41. [6] Wu Y Y, Liu C Q, Li P P, et al. Photosynthetic characteristics involved in adaptability to Karst soil and alien invasion of paper mulberry (Broussontia papyrifera)(L.) Vent in comparison with mulberry(Morus alba L.)[J]. Photosynthetica, 2009, 47(1):155-160. [7] 吴沿友.喀斯特适生植物诸葛菜综合研究[M].贵阳,贵州科技出版社,1997: 1-168. [8] 刘丛强.生物地球化学过程与地表物质循环:西南喀斯特土壤-植被系统生源要素循环[M].北京,科学出版社,2009: 1-618. [9] 何跃军,钟章成.喀斯特地区植被恢复过程中适生植物的生理生态学研究进展[J].热带亚热带植物学报,2010, 18(5): 586-592. [10] 宋同清,彭晚霞,杜虎,等.中国西南喀斯特石漠化时空演变特征、发生机制与调控对策[J].生态学报,2014, 34(18): 5328-5341. [11] 杨慧,李青芳,涂春艳,等.桂林毛村岩溶区典型植物叶片碳、氮、磷化学计量特征[J].广西植物,2015,35(4):493-499,555. [12] Siddiqui Z S, Shahid H, Cho J I, et al. Physiological responses of two halophytic grass species under drought stress environment[J]. Acta Botanica Croatica, 2016, 75(1): 31-38. [13] 吴永波,薛建辉.盐胁迫对3种白蜡树幼苗生长与光合作用的影响[J].南京林业大学学报: 自然科学版,2002, 26(3): 19-22. [14] 顾骏飞,周振翔,李志康,等.水稻低叶绿素含量突变对光合作用及产量的影响[J].作物学报,2016, 42(4): 551-560. [15] 周振翔,李志康,陈颖,等.叶绿素含量降低对水稻叶片光抑制与光合电子传递的影响[J].中国农业科学,2016, 49(19): 3709-3720. [16] Thornley J H M. Mathematical Models in plant physiology[M]. Academic Press(Inc.) London, Ltd., 1976. [17] 朱永宁,张玉书,纪瑞鹏,等.干旱胁迫下3种玉米光响应曲线模型的比较[J].沈阳农业大学学报,2012, 43(1): 3-7. [18] 张守仁.叶绿素荧光动力学参数的意义及讨论[J].植物学通报,1999, 16(4): 444-448. [19] Galle A, Florez-Sarasa I, Thameur A, et al. Effects of drought stress and subsequent rewatering on photosynthetic and respiratory pathways in Nicotiana sylvestris wild type and the mitochondrial complex I-deficient CMSII mutant[J]. Journal of experimental botany, 2009, 61(3): 765-775. [20] 邢德科,吴沿友,付为国,等.贵州喀斯特森林3种植物对不同坡位环境的光合生理响应[J].广西植物,2016,36(10):1147-1155. [21] Zhao Z, Shen Y, Shan Z, et al. Infiltration patterns and ecological function of outcrop runoff in epikarst areas of southern China[J]. Vadose Zone Journal, 2018, 17(1):1-10. [22] 陈根云,俞冠路,陈悦,等.光合作用对光合二氧化碳响应的观测方法探讨[J].植物生理与分子生物学学报,2006,32(6):691-696. [23] 刘宇锋,萧浪涛,童建华,等.非直线双曲线模型在光合光响应曲线数据分析中的应用[J].中国农学通报,2005, 21(8): 76-79. [24] 康华靖,陶月良,权伟,等.植物光合CO2响应模型对光下(暗)呼吸速率拟合的探讨[J].植物生态学报,2014, 38(12): 1356-1363. [25] 石元豹,曹兵.CO2浓度倍增对宁夏枸杞叶绿素荧光参数的影响[J].经济林研究,2015, 33(3): 108-111. [26] 徐焕文,刘宇,姜静,等.盐胁迫对白桦光合特性及叶绿素荧光参数的影响[J].西南林业大学学报,2015, 35(4): 21-26. [27] 蒋金豹,陈云浩,黄文江.病害胁迫下冬小麦冠层叶片色素含量高光谱遥感估测研究[J].光谱学与光谱分析,2007, 27(7): 1363-1367. [28] Shen Y X, Wang D J, Chen Q Q, et al. Large heterogeneity of water and nutrient supply derived from runoff of nearby rock outcrops in karst ecosystems in SW China[J]. Catena, 2019, 172: 125-131. [29] Wu Y Y, Zhao X Z, Li P P, et al. A study on the activities of carbonic anhydrase of two species of bryophytes, Tortula sinensis (Müll. Hal.) Broth. and Barbula convoluta Hedw[J]. Cryptogamie. Bryologie, 2006, 27(3): 349-355. [30] Wu Y Y, Wu X M, Li P P, et al. Comparison of photosynthetic activity of Orychophragmus violaceus and oil-seed rape[J]. Photosynthetica, 2005, 43(2): 299-302. [31] 吴沿友,梁铮,邢德科.模拟干旱胁迫下构树和桑树的生理特征比较[J].广西植物,2011, 31(1): 92-96. [32] 种培芳, 李毅,苏世平. 荒漠植物红砂叶绿素荧光参数日变化及其与环境因子的关系[J]. 中国沙漠,2010, 30(3): 539-545. [33] 于凤,高丽,闫志坚,等.库布齐沙地6种植物叶绿素荧光参数比较[J].草业科学,2012, 29(1): 83-87. [34] 宋璐璐,樊江文,吴绍洪.植物叶片性状沿海拔梯度变化研究进展[J].地理科学进展,2011, 30(11): 1431-1439. [35] 颜侃,陈宗瑜,王娟,等.不同生态区烤烟叶片温度碳同位素组成特征[J].生态学报,2015,35(11):3846-3853. [36] Zhu L, Li S H, Liang Z S, et al. Relationship between carbon isotope discrimination, mineral content and gas exchange parameters in vegetative organs of wheat grown under three different water regimes[J]. Journal of agronomy and crop science, 2010, 196(3): 175-184. [37] Wu Y Y, Xing D K. Effect of bicarbonate treatment on photosynthetic assimilation of inorganic carbon in two plant species of Moraceae[J]. Photosynthetica,2012, 50(4): 587-594.
点击查看大图
计量
- 文章访问数: 1303
- HTML浏览量: 547
- PDF下载量: 107
- 被引次数: 0