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OALib Journal期刊
ISSN: 2333-9721
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5种喀斯特生境植物叶片解剖结构特征
DOI: 10.3724/SP.J.1145.2011.00747, PP. 747-749
Keywords: 喀斯特生境,干旱,叶片解剖特征,生存策略
Abstract:
对我国喀斯特地区几种不同生活型植物――常绿植物桂花（osmanthusfragranslour.）、竹叶椒（zanthoxylunarmatumdc），落叶植物红背山麻杆（alchorneatrewioidesmuell.），草本植物石上莲（oreocharisbenthamiiclarkvar.reticulatadunn），草本植物单枝竹（monocladussaxatilischia,fungety.l.yang）的叶片形态解剖特征（叶片厚度、气孔密度、气孔结构等）进行了观察和测量，发现差异较大：竹叶椒角质层较厚，红背山麻杆的叶片较厚，单枝竹叶片上下表皮均有气孔，桂花气孔密度最高，石上莲的气孔纵径最长.结果表明：1）喀斯特生境植物存在着普遍的抗旱功能性解剖结构，用以适应喀斯特地区的特殊干旱气候；2）不同生活型植物对干旱选择的策略不同.表3参20
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