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漆树科4种植物次生韧皮部的解剖比较 预览

Anatomical Comparisons of the Secondary Phloem of Four Species of Anacardiaceae
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摘要 【目的】以漆树科3属4个种(盐肤木、青麸杨、黄连木和黄栌)的次生韧皮部为研究对象,阐明各物种次生韧皮部组成细胞的结构特征和分布规律,为植物次生韧皮部组成细胞结构特征与分泌结构之间的关系研究提供理论依据,并为漆树科植物系统演化的相关研究提供参考依据。【方法】采集盐肤木、青麸杨、黄连木和黄栌的树皮样品(样品含形成层、次生韧皮部及周皮,不含次生木质部),采用比较解剖学的方法,对漆树科4种植物的次生韧皮部的结构特征、组成细胞的构成及其排列方式进行比较,并对4种植物的乳汁道结构进行研究。【结果】漆树科4种植物次生韧皮部均是由筛管分子和伴胞、韧皮薄壁组织细胞、射线细胞、乳汁道和韧皮纤维构成,呈切向带状相间排列。黄连木、青麸杨和盐肤木的具功能韧皮部和无功能韧皮部分界明显;青麸杨的射线细胞在无功能韧皮部中倾斜分布,其余3种植物均为整齐纵向排列;青麸杨的乳汁道为分枝型乳汁道,其他3个种的乳汁道均无分枝,仅有少量相邻乳汁道融合现象发生;黄连木和黄栌次生韧皮部内分布有大量的韧皮纤维,青麸杨韧皮部中较少,而盐肤木韧皮部中无韧皮纤维分布。【结论】漆树科4种植物次生韧皮部组成细胞及乳汁道结构存在一定差异,青麸杨乳汁道是目前为止漆树科植物中发现的较为稀有的分枝型乳汁道,研究结果能够为漆树科系统进化研究提供参考依据。 【Objective】 The secondary phloem from four species of three genera in the family Anacardiaceae (Rhus chinensis,Rhus potaninii,Pistacia chinensis,and Cotinus coggygria) were used to study the structural characteristics and patterns of distribution of various cells constituting the secondary phloem in different species.The structural characteristics of resin canals and their distribution were also clarified.This can provide a theoretical basis for studying the relationship between the development of plant secondary phloem,and the synthesis and structure of secondary metabolites,and to facilitate related evolutionary studies of Anacardiaceae plants.【Method】 Bark samples were collected form Pistacia chinensis,Rhus potaninii,Cotinus coggygria and Rhus chinensis,the samples included vascular cambium,secondary phloem and periderm,but not secondary xylem.A comparative anatomical study of structural characteristics of the secondary phloem from four species in Anacardiaceae,and the composition and arrangement of its components in each,was meticulously conducted.【Result】 The results showed that the secondary phloem of the four species in Anacardiaceae consisted of sieve tubes and companion cells,phloem parenchymal cells,phloem ray cells,resin canals and phloem fibres,which were arranged in a tangential band.However,some differences in the secondary phloem and resin canal structure among the four species were still observed.The conducting phloem and non-conducting phloem of the P.chinensis,R.potaninii and R.chinensis were clearly defined.Phloem ray cells in all species were arranged in a neat and vertical direction,except in R.potaninii,where they were obliquely distributed in the non-conducting phloem.The resin canal of R.potaninii was branched but not in the other three species,and only a small amount of fusion occurred between adjacent resin canals.There were a large number of phloem fibres in the secondary phloem of P.chinensis and C.coggygria,fewer in R.potaninii,and none in the phloem of R.chinensis.【Conc
作者 赵猛 亢晶 Zhao Meng;Kang Jing(College of Life Sciences,Shanxi Normal University,Linfen 041004)
出处 《林业科学》 EI CAS CSCD 北大核心 2019年第6期167-175,共9页 Scientia Silvae Sinicae
基金 国家自然科学基金项目(31300157)。
关键词 漆树科 黄连木 黄栌 青麸杨 盐肤木 次生韧皮部 乳汁道 Anacardiaceae Pistacia chinensis Cotinus coggygria Rhus potaninii Rhus chinensis secondary phloem resin canal
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