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  • ISSN 1000-694X
  • 双月刊 创刊于1981年
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生物与土壤

沙葱(Allium mongolicum)解剖结构与抗旱性

  • 严子柱 ,
  • 满多清 ,
  • 李得禄
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  • 1. 甘肃省治沙研究所 甘肃省荒漠化与风沙灾害防治国家重点实验室(培育基地), 甘肃 武威 733000;
    2. 甘肃省治沙研究所 甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 甘肃 武威 733000
严子柱(1969-),男,甘肃古浪人,副研究员,主要从事植物多样性保护与荒漠化防治研究。Email: yanzzh2006@126.com

收稿日期: 2015-01-14

  修回日期: 2015-04-08

  网络出版日期: 2015-07-20

基金资助

甘肃省沙生植物保护利用科技创新团队项目(1207TTCA002)

The Relationship Between Drought-resistance and Anatomical Structure of Allium mongolicum's Vegetative Organs

  • Yan Zizhu ,
  • Man Duoqing ,
  • Li Delu
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  • 1. State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating, Gansu Desert Control Research Institiute, Wuwei 733000, Gansu, China;
    2. Gansu Minqin National Studies Station for Desert Steppe Ecosystem, Gansu Desert Control Research Institiute, Wuwei 733000, Gansu, China

Received date: 2015-01-14

  Revised date: 2015-04-08

  Online published: 2015-07-20

摘要

解剖表明,沙葱(Allium mongolicum)根、茎、叶结构都具有抗旱性特征。根表皮细胞排列紧密,细胞壁加厚,皮层占根横切面90%以上,内有薄壁细胞,中柱占根横切面不足10%,与皮层比值大;初生木质部为四元型结构,无髓分化。茎由多层鳞茎片环形包裹形成,内部存在异常维管束,韧皮部内有厚壁组织,中央髓腔大,内实,贮水组织同型排列,维管束发达;表皮细胞角质膜厚,外向壁加厚;肉质鳞茎片由同型组织构成,薄壁组织和维管束分布其中。叶片表面被蜡质层,表皮角质层发达,细胞壁加厚,气孔下陷,具孔下室,数量多;肉质叶,栅栏组织发达,海绵组织不发达,中间髓腔大。

本文引用格式

严子柱 , 满多清 , 李得禄 . 沙葱(Allium mongolicum)解剖结构与抗旱性[J]. 中国沙漠, 2015 , 35(4) : 890 -894 . DOI: 10.7522/j.issn.1000-694X.2015.00069

Abstract

Through the observation of the anatomy of Allium mongolicum roots, stems and leaves by the Photomicrography camera, the results showed that the roots, stems and leaves of Allium mongolicum all have structural features of drought-resistance. The root epidermal cells tightly packed and cell wall thickened; cortex is more than 90% of root cross-section and parenchymal cells inside, the center pillar is less than 10% of the root cross-section, primary xylem is four haplotype structure and no marrow differentiation. The stem formed by a multi-layer bulb pieces with ring wrapped and abnormal vasculars inside, there are sclerenchyma in phloem, big central canal and full inside, the same type aqueous tissue arranged and vascular bundles developed, cuticular membrane and outgoing wall thickened; stem fleshy bulb composed by the same tissue, which parenchyma and vascular bundle distributed inside. Leaf surface covered with wax layer, the stratum corneum developed, the cell wall thickened and more stomatal subsidence with holes under the room; palisade tissue developed, spongy tissue undeveloped and big middle canal in fleshy leaves. These structural features of drought-resistance are great significance on surviving of Allium mongolicum in extreme drought environment.

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