[1]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].西北林学院学报,2014,29(02):207-212.[doi:doi:10.3969/j.issn.1001-7461.2014.02.37]
 ZHOU Chao-bin,XIN Hui-hui,SONG Yu-yang*. Secondary Xylem Anatomical Structure and Its Plasticity of Haloxylon ammodendron [J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2014,29(02):207-212.[doi:doi:10.3969/j.issn.1001-7461.2014.02.37]
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 梭梭次生木质部解剖特征及其可塑性研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第29卷
期数:
2014年02期
页码:
207-212
栏目:
出版日期:
2014-03-30

文章信息/Info

Title:
 Secondary Xylem Anatomical Structure and Its Plasticity of Haloxylon ammodendron
文章编号:
1001-7461(2014)-02-0208-05
作者:
 周朝彬辛慧慧宋于洋*
 (石河子大学农学院,新疆 石河子 832000)
Author(s):
 ZHOU Chao-bin XIN Hui-hui SONG Yu-yang*
 (College of Agriculture, Shihezi University, Shihezi, Xinjiang 832000, China)
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
Keywords:
 Gurbantonggut desert sandy type loam type H. ammodendron anatomical structures plasticity
分类号:
S718.1
DOI:
doi:10.3969/j.issn.1001-7461.2014.02.37
文献标志码:
A
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。
Abstract:
 In order to reveal the environment adaptability of Haloxylon ammodendron to drought stress, the anatomical structures of secondary xylem of H. ammodendron in southern Gurbantünggüt 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 Gurbantünggüt desert consequently.

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备注/Memo

备注/Memo:
 收稿日期:2013-07-26 修回日期:2013-10-28
基金项目:国家自然科学基金项目(31160158);石河子大学青年骨干教师培养计划项目;石河子大学优秀青年基金(2013ZRKXYQ10)。
作者简介:周朝彬,男,副教授,研究方向:林业生态。E-mail: zhcbsicau@126.com
*通信作者:宋于洋,男,教授,研究方向:天然林保护与利用。E-mail: syy_agr@shzu.edu.cn
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