干旱区生态环境知识资源中心(Arid): 梭梭次生木质部解剖特征及其可塑性研究

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	梭梭次生木质部解剖特征及其可塑性研究
其他题名	Secondary Xylem Anatomical Structure and Its Plasticity of Haloxylon ammodendron
	周朝彬; 辛慧慧; 宋于洋
来源期刊	西北林学院学报
ISSN	1001-7461
出版年	2014
卷号	29 期号:2 页码:207-212
中文摘要	为揭示梭梭对干旱环境的适应性,对古尔班通古特沙漠南缘梭梭次生木质部解剖结构进行观测,研究次生木质部解剖特征的可塑性。结果表明:梭梭次生木质部解剖结构中,导管有宽导管和窄导管2种,导管频率和导管复孔率较高,导管个数较多,导管壁和纤维壁明显增厚,Vulnerability值和Mesomorphy值较小,因此梭梭对干旱环境的适应性强。2种土壤类型中,沙质类型的导管壁厚、导管频率、导管复孔率、导管长度和纤维壁厚显著高于土质类型,而纤维长度则极显著低于土质类型,表明沙质类型梭梭比土质类型具有更强的抗旱性。梭梭次生木质部解剖结构对水分条件具有较强的可塑性,使古尔班通古特沙漠的梭梭具有更宽的生态幅和更好的抗旱性,从而成为该沙漠的优势种。
英文摘要	In order to reveal the environment adaptability of Haloxylon ammodendron to drought stress, the anatomical structures of secondary xylem of H. ammodendron in southern Gurbantunggut desert were examined, and the plasticity of secondary xylem anatomical structures were studied in this paper. The results showed that the secondary xylem with the narrow and wide vessel elements, the high vessel frequency, the low percentage single pores, the numerous vessels, thick-walled vessels and fibres, could lead to smaller vulnerability and mesomorphy value. Therefore, the adaption of H. ammodendron to drought was high. Compared with the loam type, the thickness, frequency and length of vessels, percentage of pores in clusters and thickness of fibres were significantly higher in sandy type. The length of fibres was significantly lower in sandy type, which indicated that the plant in sandy type was more drought resistant than in loam type. It was concluded that, the secondary xylem anatomical structures of H. ammodendron with high plasticity for water stress lead to wider ecological amplitude and better drought resistance. H. ammodendron become a dominant species in Gurbantunggut desert consequently.
中文关键词	古尔班通古特沙漠 ; 沙土类型 ; 土质类型 ; 梭梭 ; 解剖结构 ; 可塑性
英文关键词	Gurbantonggut desert sandy type loam type H. ammodendron anatomical structures plasticity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5105143
来源机构	石河子大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231875
作者单位	石河子大学农学院, 石河子, 新疆 832000, 中国
推荐引用方式 GB/T 7714	周朝彬,辛慧慧,宋于洋. 梭梭次生木质部解剖特征及其可塑性研究[J]. 石河子大学,2014,29(2):207-212.
APA	周朝彬,辛慧慧,&宋于洋.(2014).梭梭次生木质部解剖特征及其可塑性研究.西北林学院学报,29(2),207-212.
MLA	周朝彬,et al."梭梭次生木质部解剖特征及其可塑性研究".西北林学院学报 29.2(2014):207-212.