佛甲草(Sedum lineare)在干旱条件下的气体交换

摘要
图/表
参考文献
相关文章 (8)

全文: PDF (681 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要

在干旱条件下,测定了广州市1、4、5和年期屋顶绿化植物佛甲草叶片的气体交换参数、相对含水量(RWC)和比叶重(LMA),探讨了佛甲草在屋顶绿化中的生理生态适应性.结果表明不同生长期佛甲草叶片的RWC和LMA相对较低,分别在81.79%～87.58%和0.059～0.072 kg·m^-2之间,RWC和LMA在不同生长期的差异不显著(P>0.05).不同生长期佛甲草的气体交换参数CO₂同化速率(A)、气孔导度(g_s)和蒸腾速率(E)均呈现相似的日变化格型,A、g_s和E的日均值差异不显著(P>0.05).A、g_s和E之间的日变化呈明显的正相关关系(P<0.01).根据植物的RWC和气体交换参数的特征,推断佛甲草属兼性CAM植物,不同生长期佛甲草的主要生理生态指标相似.

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	曾小平
	赵平
	蔡锡安
	余孟好
	梅婷婷
	邹绿柳
	朱丽薇

关键词 ：佛甲草, 景天酸代谢, 气体交换, 干旱

Abstract：

To investigate ecophysiological adaptability of roof greening plant Sedum lineare of one,four,five and six years old,relative water content(RWC),mass per unit leaf area(LMA),and diurnal variation of gas exchange parameters in leaf were measured under drought condition in Guangzhou,China.Both RWC and LMA were low,and their values were 81.79% 87.58% and 0.0590.072 kg·m^-2, respectively.S.lineare in different growth stages did not show significant change in leaf RWC and LMA(P<0.05).Gas exchange parameters including CO₂ assimilation rate(A),stomatal conductance(g_s),and transpiration(E)presented similar diurnal variation pattern in different growth stages of plant.There was also no significant variation in A,g_s and E(P<0.05)in different growth stages.A, g_s and E were significantly correlated with each other during a 24 h time-course(P<0.01).S.lineare is considered to be a facultative crassulacean acid metabolism(CAM) plant according to its characteristics of RWC and gas exchange parameters.There are similar major ecophysiological indices in 5.lineare in different growth stages.

Key words： Sedum lineare crassulacean acid metabolism(CAM) gas exchange drought

收稿日期: 2011-04-25

Q945

基金资助:国家自然科学基金面上项目(30770328,30871998,31070363);中国科学院退化生态系统植被恢复与管理重点实验室基金项目(201028);广州市科技亚运专项“广州亚运绿色和环保技术研究与示范”

引用本文:

曾小平1*, 赵平1, 蔡锡安1, 余孟好1, 梅婷婷1, 邹绿柳1, 朱丽薇1, 杨水龙2. 佛甲草(Sedum lineare)在干旱条件下的气体交换[J]. , 2011, 30(2): 156-161.
ZENG Xiao-ping1, ZHAO Ping1, CAI Xi-an1, YU Meng-hao1, MEI Ting-ting1, ZOU Lu-liu1, ZHU Li-wei1, YANG Shui-long2. Gas exchange of Sedum lineare under drought condition. , 2011, 30(2): 156-161.

链接本文:

http://www.ecolsci.com/CN/Y2011/V30/I2/156

[1] Larcher W.physiological Plant Ecology(4^thed)[M].New York:Springer,2003.

[2] Lambers H,Chapin ⅢF S,PonsT L.Plant Physiological Ecology (2^nd ed)[M].New York:Springer,2008.

[3] Winter K,Garcial M,HoltumJ A M.On the nature of facultative and constitutive CAM:environmental and developmental control of CAM expression during early,growth of Clusia,Kalanchoё,and Opuntia[J].Journal of Experimental Botany,2008,59(7):1829-1840.

[4] Herrera A.Crassulacean acid metabolism and fitness under water deficit stress:if not for carbon gain,what is facultative CAM good for[J]?Annals of Botany,2009,103:645-653.

[5] LUttge U.Ecophysiology of crassulacean acid metabolism(CAM)[J].Annals of Botany,2004,93:629-652.

[6] Getter K L,Rowe D B,RobertsonG B CreggB M,Andresen J A,Carbon sequestration potential of extensive green roofs[J].Environmental Science ＆ Technology,2009,43:7564-7570.

[7] 中国科学院中国植物志编辑委员会.中国植物志[M].北京:科学出版社,1997.

[8] 赵定国,李桥,艾侠,徐信农,胡荣华,贾凯华,高璐.平顶屋面绿化的好材料-佛甲草初考[J].上海农业学报,2001,17(4):58-59.

[9] 付国良,王艳丽.佛甲草用于屋顶绿化-绝色建筑新技术[J].中国园林,2005,(5):67-70.

[10] 白淑嫒.佛甲草与屋顶绿化[J],风景园林,2006,(4):55-57.

[11] Conti S,Smimoff N.Rapid triggering of malate accumulation in the C₃/CAM intermediate plant Sedum telephium:relationslup with water status and phosphoenolpyruvate carboxylase[J].Journal of Experimental Botany,1994,45(280):1613-1621.

[12] Borland A M.A model for the partitioning of photosynthetically fixed carbon during the C₃-CAM transition in Sedum telephium[J].New Phytologist,1996,134:433-444.

[13] Fondom N Y,Castro-Nava,HuertaA J.Seasonal variation in photosynthesis and diel carbon balance under natural conditions in two Peperomia species that differ with respect to leaf anatomy[J].Journal of the Torrey Botanical Society,2009,136(1):57-69.

[14] Ceusters J,Borland A M,Londers E,Verdoodt V,Godts C.Differential usage of storage carbohydrates in the CAM bromeliad Aechmea 'Maya' during acclimation to drought and recovery from dehydration[J].Physiologia Plantarum,2009,135:174-184.

[15] Wahl S,Ryser P.Root tissue structure is linked to ecological strategies of grasses[J].New Phytologist,2000,148:459-471.

[16] Westoby M,Falster D S,Moles A T,Vesk P A,Wright U.Plant ecological strategies:some leading dimensions of variation between species[J].Annual Review of Ecology and Systematics,2002,33:125-159.

[17] Grime J P.The role of plasticity in exploiting environmental heterogeneity[M].In:Caldwell M M and Pearcy R W,eds.Exploitation of Environmental Heterogeneity by Plants:Ecophysiological Processes Above-and Below-ground.New York:Academic Press,1994.1-19.

[18] Winter K,Aranda J,Holtum J A M.Carbon isotope composition and water-use efficiency in plants with crassulacean acid metabolism[J].Functional Plant Biology,2005,32:381-388.

[19] Gravatt D A,Martin C E.Comparative ecophysiology of five species of Sedum (Crassulaceae) under well-watered and drought-stressed conditions[J].Oecologia,1992,92:532-541.

[20] von Caemmerer S,Griffiths H.Stomatal responses to CO₂ during a diel crassulacean acid metabolism cycle in Kalanchoe daigremontiana and Kalanchoe pinnata[J].Plant,Cell and Environment,2009,32:567-576.

[21] Baroli I,Price G D,Badger M R,von Caemmerer S.The contribution of photosynthesis to the red light response of stomatal conductance[J].Plant Physiology,2008,146:737-747.