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兜兰叶片结构与抗旱性关联的研究
张英杰,刘学庆,张京伟,郭文姣,刘述河,初美静,孙纪霞
0
(烟台市农业科学研究院,烟台 265500)
摘要:
以8种兜兰(Paphiopedilum)的叶片为试材,研究其叶片解剖结构特征。结果表明,兜兰叶片厚509.6~1 142.6 μm,具有巨大的上表皮细胞(平均厚度295.32 μm),最厚处占叶片总厚度的近50%。兜兰较厚的上表皮和角质层、气孔下生型以及发达的龙骨状主叶脉,能保证其在水肥易流失的土壤环境中维持正常的生理代谢。兜兰表皮厚度较大,叶肉细胞厚度相对较低可能是导致兜兰虽为C3植物但是营养生长速度慢的原因。应用隶属函数值法对8种兜兰的抗旱性排序为:带叶兜兰>绿魔帝>杏黄兜兰>红肉饼>绿肉饼>红魔帝>硬叶兜兰>白旗兜兰,野生种的抗旱性与其生态分布范围相关,抗旱性越强,生态分布范围越广。调控相对高的空气湿度,并选择树皮等适合兜兰生长的基质,将有效解决兜兰设施栽培周期长的问题。
关键词:  兜兰  叶片解剖结构  抗旱性
DOI:10.13610/j.cnki.1672-352x.20171214.031
投稿时间:2016-08-16
基金项目:山东省2017年度农业重大应用技术创新项目“山东主要设施花卉提质增效关键技术研究与示范”, 烟台市科技发展计划“名优兜兰新品种筛选和高效设施化生产技术研究”(2015NC03901006)共同资助。
Drought resistance and leaf anatomical structure of Paphiopedilum
ZHANG Yingjie,LIU Xueqing,ZHANG Jingwei,GUO Wenjiao,LIU Shuhe,CHU Meijing,SUN Jixia
(Yantai Agricultural Science and Technology Institute, Yantai 265500)
Abstract:
The leaf anatomical structure of 8 Paphiopedilum species was studied. Results showed that the leaf was thick (509.6-1142.6μm), and the adaxial epidermis were big and thick, and average thickness was 295.32 μm, even close to 50% of the leaf. The characteristics of thick adaxial epidermis and cuticle, hypostomaty, and carinal main veins could keep the leaves having normal metabolism in the soil where water and fertilizer were easy to lose. Moreover, the thick adaxial epidermis and relatively few mesophyll cells might cause slow-growing of Paphiopedilum although it belongs to C3 plant species. An order of drought resistance of the 8 species was arranged using subordinate function values analysis: P. hirsutissimum P. Maudiae P. armeniacumP. In-Charm CircleP. Cocoa Lovely>P. Hsinying Web P. micranthumP. spicerianum. Their drought resistance was in accord with their ecological distribution, i.e., the stronger its drought resistance was, the wider it distributed. The long growth circle of Paphiopedilum could be solved by improving the air humidity and choosing the adaptive culture medium such as pine barks.
Key words:  Paphiopedilum  leaf anatomical structure  drought resistance

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