中国特有植物艾比湖沙拐枣(Calligonum ebi-nuricum)居群内果实性状的变异 |
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引用本文: | 康晓珊,潘伯荣,张永智,段士民,师玮. 中国特有植物艾比湖沙拐枣(Calligonum ebi-nuricum)居群内果实性状的变异[J]. 植物研究, 2009, 29(6): 747-752 |
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作者姓名: | 康晓珊 潘伯荣 张永智 段士民 师玮 |
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作者单位: | (1.中国科学院新疆生态与地理研究所吐鲁番沙漠植物园,吐鲁番 838008) ;(2.中国科学院研究生院,北京 100039) |
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摘 要: | 以中国荒漠特有植物艾比湖沙拐枣(Calligonum ebi-nuricum)果实形态特征为研究对象,对分布于原产区的同一居群12个样株的果实进行形态特征比较研究。通过每株30粒果实的喙长、果实长度、果实宽度、果实形状、瘦果长度、瘦果宽度、瘦果形状、刺毛长度、头部刺毛长度、两肋间距、两刺间距11个性状指标的数值分析表明:在株内与株间均有变异,株间果实性状变异较株内果实性状变异大;代表果实和瘦果大小指标正相关性极显著(p<0.01);两肋间距与瘦果形状呈负相关(r=-0.297**,p<0.01)。研究结果证明:其果实形状和瘦果形状(长度、宽度及长宽比)较为稳定,可作为艾比湖沙拐枣的分种依据,而其它果实性状可塑性较大,只能作为分类的参考。该研究结果可供沙拐枣属其它种的准确分类参考。
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关 键 词: | 艾比湖沙拐枣;果实形态;种内变异;可塑性 |
Variation in Fruit Characteristics of the Chinese Endemic Species Calligonum ebi-nuricum in Population |
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Affiliation: | (1.Turpan Eremophytes Botanical Garden,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Turpan 838008) (2.Graduate University of Chinese Academy Sciences,Beijing 100039) |
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Abstract: | In this paper, the fruits morphological characteristics of 12 individual plants in the same population of Calligonum ebi-nuricums, which are growing in Jinghe of Xinjiang Province,are studied by numerical analysis. The results show that the morphological variation of 11 morphological traits, including length of beak, length of fruit, width of fruit, shape of fruit, length of achene, width of achene, shape of achene, length of bristle, the length of bristle of head, the distance between ribs and the distance between bristles, existed both within plant and amang plants, and the degree of variation within plant were lesser than amang plants. There is obvious correlation in indices of the fruits and the achene sizes(p<0.01). However, the shape of achene and the distance between ribs are negatively correlated (r=-0.297**,p<0.01), which means width of achene increases with the distance between ribs. It was concluded that the shape of the fruits and achenes could be used for species classification; and those characteristics with greater plasticity were less useful in distinguishing the sibling species with sympatric distribution. This result can be referred to classify of other species in Calligonum. |
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Keywords: | Calligonum ebi-nuricum;fruit morphology;intraspecific variations;plasticity |
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