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題名 | Polystichum Puteicola, sp. nov. (sect. Haplopolystichum, Dryopteridaceae) from a Karst Sinkhole in Guizhou, China Based on Molecular, Palynological, and Morphological Evidence=中國貴州喀斯特天坑耳蕨屬一新種 : 吞天井耳蕨(鱗毛蕨科半 開羽耳蕨組)--基於分子、孢子周壁紋飾和形態學證據 |
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作者 | 張麗兵; 何海; 駱強; | 書刊名 | Botanical Studies |
卷期 | 51:1 2010.01[民99.01] |
頁次 | 頁127-136 |
分類號 | 378.13 |
關鍵詞 | 中國; 鱗毛蕨科; 貴州; 喀斯特地貌; 喀斯特天坑; 斜羽耳蕨; 吞天井耳蕨; 系統發育; 半開羽耳蕨組; 孢子形態; trnL-F 基因間區序列; China; Dryopteridaceae; Guizhou; Karst landscapes; Karst sinkhole; Phylogeny; Polystichum obliquum; Polystichum puteicola; sect. Haplopolystichum; Spore morphology; trnL-F sequence; |
語文 | 英文(English) |
中文摘要 | 本文描述了在中國貴州西北部一喀斯特天坑中發現的耳蕨屬半開羽耳蕨組 (Polystichum sect. Haplopolystichum) 一新種: 吞天井耳蕨 (P. puteicola),並提供線繪圖與彩色照片以資辨識。吞天井耳蕨形態上與間斷分佈於臺灣、中國-喜馬拉雅石灰岩地區的斜羽耳蕨(P. obliquum )相似,但吞天井耳蕨的葉片基部最寬,向基部不縮短,葉柄鱗片近軸面深棕色,葉軸鱗片達 3.6 × 0.8 mm ,羽片深綠色,近革質,向軸面有光澤,邊緣具略波狀微齒或近全緣,小鱗片達2 × 0.5 mm ; 而斜羽耳蕨的葉片的基部縮短,葉柄鱗片向軸面棕色,葉軸鱗片達2.3 ×0.5 mm ,羽片綠色,草質,向軸面無光澤,邊緣有鋸齒,小鱗片達0.5-0.8 × 0.2-0.3 mm 。最有趣的是,兩者在 葉綠體trnL-F 基因間區的DNA 序列上有七個位點的差異。系統學分析表明,兩種耳蕨並不是最近緣的。吞天井耳蕨的孢子周壁紋飾為冠狀並具衆多微刺。本文給出了吞天井耳蕨在地理分佈、生態學、孢子形態和trnL-F 基因間區的DNA 序列特徴,並對該種的瀕危狀況做出了評價。 |
英文摘要 | A new fern species, Polystichum puteicola (sect. Haplopolystichum, Dryopteridaceae), is described from a karst sinkhole in northwestern Guizhou, China. The new species is morphologically similar to P. obliquum, a species disjunctly occurring in limestone areas in Taiwan, southwestern China to the western Indo-Himalaya. Polystichum puteicola has lamina not contracted towards base (with the largest basal pinnae), petiole scales dark brown adaxially, rachis scales up to 3.6 × 0.8 mm, pinnae dark green, subcoriaceous, lustrous adaxially, and slightly repand or almost entire on margin, and microscales up to 2 × 0.5 mm. In contrast, P. obliquum has lamina with basal pinnae contracted, scales of petiole brown adaxially, scales of rachis up to 2.3 × 0.5 mm, pinnae green, chartaceous, matt adaxially, and serrulate on margin, and microscales 0.2-0.5 × 0.1-0.2 mm. Most interestingly, the two species differs in seven positions in the DNA sequences of chloroplast trnL-F intergenic spacer. Our phylogenetic analysis shows that the two species are even not closely related. Palynologically, P. puteicola has cristate sculpture with numerous spinules on its perispore. Features of the new species in geographical distribution, ecology, spore morphology, and trnL-F sequence are given. Conservation assessments are also presented following the IuCN guidelines. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。