民勤荒漠植物叶片水分吸收性状研究

doi:10.13866/j.azr.2020.05.18

摘要/Abstract

摘要： 在水分输入以小量级降水和凝结水为主导的干旱区，植物叶片吸收水分策略具有尤为重要的生态意义。以民勤地区20种荒漠植物为研究对象，测定叶片单位面积吸水量（LWUC）、含水量增加率（RW）、水分饱和亏（WSD）、比叶面积（SLA）、干物质含量（LDMC），分析植物各叶片性状的分布规律及其相互关系，并比较不同功能群植物叶片水分吸收性状的变异特征。结果表明：（1）叶片可以吸收水分，具有利用小量级降水的能力；叶片性状存在较大的种间差异。（2）叶片LWUC与LDMC呈极显著负相关（P＜0.01），RW与WSD呈极显著正相关（P＜0.01）。（3）不同生长型植物叶片LWUC、RW、WSD差异不显著（P＞0.05）。（4）不同质地植物叶片LWUC差异极显著（P＜0.01），其中，肉质多汁类型植物显著（P＜0.05）高于草质、革质类型植物，肉质多汁和叶片退化类型植物差异不显著（P＞0.05）。（5）不同叶面性状植物叶片LWUC差异不显著（P＞0.05），但覆毛类型植物叶片RW、WSD极显著（P＜0.01）高于光滑叶面平均值。总之，本研究可以加深对荒漠生态系统不同功能型植物利用水资源方式和策略的理解，增强对荒漠植物生态适应对策和荒漠植被格局变化的认识，并为其保护和恢复提供科学依据。

关键词: 荒漠植物, 小量级降水, 叶片水分吸收性状, 民勤

Abstract: Leaf water absorption strategy is of great ecological significance in arid areas, where the water input is dominated by small precipitation and condensate water. In this study, 20 desert plants were taken as the study object in Minqin.We measured LWUC, RW, WSD, SLA, and LDMC and analyzed the distribution characteristics of plant leaf traits and their correlation; the variation characteristics of leaf water uptake traits of small functional groups were compared. The results showed that (1) the leaves could absorb water and could make use of small precipitation. There were significant interspecific differences in leaf traits. (2) LWUC was significantly negatively correlated with LDMC (P<0.01), and RW was positively correlated with WSD (P<0.01). (3) There were no significant differences in LWUC, RW, and WSD of different plant growth forms (P>0.05). (4) There was a significant difference in LWUC among plants with different leaf textures (P<0.01); the succulents had significantly (P<0.05) higher LWUC than the herbaceous and coriaceous plants, and there was no significant difference between the succulents and the aphyllous plants. (5) There was no significant difference in LWUC between plants with different leaf surface traits (P>0.05), but the RW and WSD of tomentose leaves were significantly higher than those of smooth leaves (P<0.01).This study is expected to help better understand the water use manners and strategies of different functional plantsin desert ecosystems and to improve our knowledge of ecological adaption strategies of desert plants and the changes of desert vegetation patterns to provide a scientific basis for their protection and restoration.

Key words: desert plants, small precipitation leaf water, uptake traits, Minqin

王飞, 郭树江, 韩福贵, 王方琳, 张卫星, 张裕年. 民勤荒漠植物叶片水分吸收性状研究[J]. 干旱区研究, 2020, 37(5): 1256-1263.

WANG Fei, GUO Shu-jiang, HAN Fu-gui, WANG Fang-lin, ZHANG Wei-xing, ZHANG Yu-nian. Study on leaf water uptake traits of desert plants in Minqin[J]. Arid Zone Research, 2020, 37(5): 1256-1263.

参考文献

[1] Wright I J, Rrich P B, Westoby M, et al. The worldwide leaf eco⁃ 1261 nomics spectrum[J]. Nature, 2004, 428: 821-827. [2] 宝乐, 刘艳红. 东灵山地区不同森林群落叶功能性状比较[J]. 生态学报, 2009, 29(7): 3692-3703. [Bao Le, Liu Yanhong. Compari⁃ son of leaf functional traits in different forest communities in Mt. Dongling of Beijing[J]. Acta Ecologica Sinica, 2009, 29(7): 3692- 3703. ] [3] 张林, 罗天祥. 植物叶寿命及其相关叶性状的生态学研究进展 [J]. 植物生态学报, 2004, 28(6): 844-852. [Zhang Lin, Luo Tianx⁃ iang. Advances in ecological studies on leaf lifespan and associat⁃ ed leaf traits[J]. Acta Phytoecologyica Sinica, 2004, 28(6): 844- 852. ] [4] Sala O E, Lauenroth W K, Parton W J. Long-termsoil-water dynam⁃ ics in the shortgrass steppe[J]. Ecology, 1992, 73: 1175-1181. [5] Loik M E, Breshears D D, Lauenroth W K, et al. Amulti-scale per⁃ spective of water pulses in dryland ecosystems: Climatology and ecohydrology of the Western USA[J]. Oecologia, 2004, 141: 269- 281. [6] Ogle K, Reynolds J F. Plant responses to precipitation in desert ecosystems: Integrating functional types, pulses, thresholds, and delays[J]. Oecologia, 2004, 141: 282-294. [7] Boucher J F, Munson A D, Bernier P Y. Foliar absorption of dew influences shoot water potential and root growth in Pinus strobus seedlings[J]. Tree Physiology, 1995, 15: 819-823. [8] Barradas V L, Glez-Medellín M G. Dew and its effect on two helio⁃ phile understorey species of a tropical dry deciduous forest in Mex⁃ ico[J]. International Journal of Biometeorology, 1999, 43: 1-7. [9] Ewing H A, Weathers K C, Templer P H, et al. Fog water and eco⁃ system function: Heterogeneity in a California Red-wood forest[J]. Ecosystems, 2009, 12: 417-433. [10] 庄艳丽, 赵文智. 凝结水对温带荒漠一年生植物生态作用研究 [J]. 干旱区研究, 2009, 26(4): 526-532. [Zhuang Yanli, Zhao Wenzhi. Study on the ecological effects of condensed water on an annual plant in a temperate desert[J]. Arid Zone Research, 2009, 26(4): 526-532. ] [11] 郑新军, 李嵩, 李彦. 准噶尔盆地荒漠植物的叶片水分吸收策略 [J]. 植物生态学报, 2011, 35(9): 893-905. [Zheng Xinjun, Li Shong, Li Yan. Leaf water uptake strategy of desert plants in the Junggar Basin, China[J]. Chinese Journal of Plant Ecology, 2011, 35(9): 893-905. ] [12] Monteith J L. A reinterpretation of stomatal responses to humidity [J]. Plant Cell and Environment, 1995, 18: 357-364. [13] Kerstiens G. Cuticular water permeability and its physiological sig⁃ nificance[J]. Journal of Experimental Botany, 1996, 47(305): 1813-1832. [14] Schreiber L, Skrabs M, Hartmann K D. Effect of humidity on cutic⁃ ular water permeability of isolated cuticular membranes and leaf disks[J]. Planta, 2001, 214: 274-282. [15] Yates D J, Hutley L B. Foliar uptake of water by wet leaves of Sloa⁃ nea woollsii, an Australian subtropical rainforest tree[J]. Austra⁃ lian Journal of Botany, 1995, 43: 157-167. [16] Berry Z C, Hughes N M, Smith W K. Cloud immersion: An impor⁃ tant water source for spruce and fir saplings in the southern Appa⁃ lachian Mountains[J]. Oecologia, 2014, 174(2): 319-326. [17] Gaff D F. Desiccation tolerant vascular plants of southern Africa [J]. Oecologia, 1977, 31(1): 95-109. [18] Cassana F F, Eller C B, Oliveira R S. Effects of soil water availability on foliar water uptake of Araucaria angustifolia[J]. Plant and Soil, 2016, 399: 147-157. [19] Breshears D D, McDowell N G, Dayem K E, et al. Foliar absorp⁃ tion of intercepted rainfall improves woody plant water status most during drought[J]. Ecology, 2008, 89(1): 41-47. [20] Munné-Bosh S. Direct foliar absorption of rainfall water and its bio⁃ logical significance in dryland ecosystems [J]. Journal of Arid En⁃ vironments, 2010, 74: 417-418. [21] Limm E B, Simonin K A, Bothman A G, et al. Foliar water uptake: A common water acquisition strategy for plants of the redwood for⁃ est[J]. Oecologia, 2009, 161: 449-459. [22] Schwerbrock R, Leuschner C. Foliar water uptake, a widespread phenomenon in temperate woodland ferns? [J]. Plant and Soil, 2017, 218: 555-563. [23] 李世明, 程国栋, 李元红, 等. 河西走廊水资源合理利用与生态环境保护[M]. 郑州: 黄河水利出版社, 2002: 76-249. [Li Shim⁃ ing, Cheng Guodong, Li Yuanhong, et al. Rational Utilization of Water Resources and Ecological Environment Protection in Hexi Corridor [M]. Zhengzhou: Yellow River Conservancy Press, 2002: 76- 249. ] [24] 郑玉龙, 冯玉龙. 西双版纳地区附生与非附生植物叶片对雾水的吸收[J]. 应用生态学报, 2006, 17(6): 977-981. [Zheng Yulong, Feng Yulong. Fog water absorption by the leaves of epiphytes and non-epiphytes in Xishuangbanna[J]. Chinese Journal of Applied Ecology, 2006, 17(6): 977-981. ] [25] 陈林, 杨新国, 宋乃平, 等. 干旱半干旱地区植物叶片水分吸收性状[J]. 浙江大学学报(农业与生命科学版), 2013, 39(5): 565- 574. [Chen Lin, Yang Xinguo, Song Naiping, et al. Leaf water up⁃ take strategy of plants in the arid and semi-arid region of Ningxia [J]. Journal of Zhejiang University(Agriculture & Life Sciences Edition), 2013, 39(5): 565- 574. ] [26] 张晶, 左小安, 吕朋, 等. 科尔沁沙地典型草地植物功能性状及其相互关系[J]. 干旱区研究, 2018, 35(1): 137-143. [Zhang Jing, Zuo Xiao􀆳an, Lyu Peng, et al. Functional traits and interrelations of dominant plant species on typical grassland in the Horqin San⁃ dy Land, China[J]. Arid Zone Research, 2018, 35(1): 137-143. ] [27] 白文娟, 郑粉莉, 董莉丽, 等. 黄土高原水蚀风蚀交错带不同生境植物的叶性状[J]. 生态学报, 2010, 30(10): 2529-2540. [Bai Wenjuan, Zheng Fenli, Dong Lili, et al. Leaf traits of species in different habits in the water-wind erosion region of the Loess Pla⁃ teau[J]. Acta Ecologica Sinica, 2010, 30(10): 2529-2540. ] [28] 施宇, 温仲明, 龚时慧. 黄土丘陵区植物叶片与细根功能性状关系及其变化[J]. 生态学报, 2011, 31(22): 6805-6814. [Shi Yu, Wen Zhongming, Gong Shihui. Comparisons of relationships be⁃ tween leaf and fine root traits in hilly area of the Loess Plateau, Yanhe River basin, Shaanxi Province, China[J]. Acta Ecologica Si⁃ nica, 2011, 31(22): 6805-6814. ] [29] Wilson P J, Thompson K, Hodgson J G. Specific leaf area and leaf dry matter content as alternative predictors of plant strategies[J]. New Phytologist, 1999, 143(1): 155-162. [30] Hülskamp M, Schwab B. Trichomes[M]. New York: John Wiley &Sons, Ltd. , 2001. [31] Ohrui T, Nobira H, Sakata Y, et al. Foliar trichome and aquaporinaided water uptake in a drought-resistant epiphyte Tillandsia ion⁃ antha Planchon[J]. Planta, 2007, 227: 47-56. [32] 李冰, 刘左军, 赵志刚, 等. 海拔对钝裂银莲花不同花色居群间繁殖特征及繁殖分配的影响[J]. 草业学报, 2013, 22(1): 10-19. [Li Bing, Liu Zuojun, Zhao Zhigang, et al. Influence of altitude on reproductive traits and reproductive allocation of different colours in Anemone obtusiloba populations[J]. Acta Prataculturae Sinica, 2013, 22(1): 10-19. ] [33] 赵红洋, 李玉霖, 王新源, 等. 科尔沁沙地52种植物叶片性状变异特征研究[J]. 中国沙漠, 2010, 30(6): 1292-1298. [Zhao Hong⁃ yang, Li Yulin, Wang Xinyuan, et al. Variations in leaf traits of 52 plants in Horqin sand land[J]. Journal of Desert Research, 2010, 30(6): 1292-1298. ]