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台灣水韭（學名：Isoetes taiwanensis），是水韭屬的一種多年沉水、挺 … 台灣水韭（學名：Isoetes taiwanensis），是水韭屬的一種多年沉水、挺水或陸生之水生草本植物，分佈於陽明山國家公園七星山的夢幻湖，是台灣唯一一種水韭屬物種，在1971年由及首次發現。為臺灣特有種的稀有植物，大約於5000年前就出現在夢幻湖之中，是一種非常稀有的水生石松門植物。這是全球七十多種的水韭科植物之中，生長倒數第二接近赤道的植物。 最早起源於距今約2.5億年前的三疊紀早期，同時也是一種活化石植物。其相近親緣植物均盛產於恐龍稱霸的白堊紀時代，距今約6550萬年至1億4550萬年前，如Isoetites、Nathorstiana和Stylits現均已滅絕，獨留低矮草狀的水韭至今，故在植物分類學及演化學的研究上具有相當重要之地位。均已滅絕，獨留低矮草狀的水韭至今，故在植物分類學及演化學的研究上具有相當重要之地位。
, Isoetes taiwanensis är en kärlväxtart som beskrevs av De Vol. Isoetes taiwanensis ingår i släktet braxengräs, och familjen Isoetaceae. Utöver nominatformen finns också underarten I. t. kinmenensis.
, Isoetes taiwanensis is a species of plant … Isoetes taiwanensis is a species of plant in the family Isoetaceae. It is endemic to Taiwan, and the only species of quillwort there. As other quillworts, it is relatively small, with erect leaves 7–24 cm (2.8–9.4 in) long. It grows submersed in shallow ponds for most of the year. IUCN considers it critically endangered because of habitat loss. The first quillwort genome sequence was of I. taiwanensis. This showed that there were differences in its biochemistry from terrestrial plants that had adopted the same strategy for CO2 fixation, namely Crassulacean acid metabolism (CAM). This involves the enzyme phosphoenolpyruvate carboxylase (PEPC) and plants have two forms of the enzyme. One is normally involved in CO2 fixation during photosynthesis and the other in central metabolism. From the genome sequence, it appears that in I. taiwanensis both forms are involved in photosynthesis. In addition, the time of day of the peak abundance of some of the components of CAM was different from terrestrial plants. These fundamental differences in biochemistry suggests that CAM in I. taiwanensis, and likely all quillworts, is another example of convergent evolution of CAM.er example of convergent evolution of CAM.
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台灣水韭（學名：Isoetes taiwanensis），是水韭屬的一種多年沉水、挺 … 台灣水韭（學名：Isoetes taiwanensis），是水韭屬的一種多年沉水、挺水或陸生之水生草本植物，分佈於陽明山國家公園七星山的夢幻湖，是台灣唯一一種水韭屬物種，在1971年由及首次發現。為臺灣特有種的稀有植物，大約於5000年前就出現在夢幻湖之中，是一種非常稀有的水生石松門植物。這是全球七十多種的水韭科植物之中，生長倒數第二接近赤道的植物。 最早起源於距今約2.5億年前的三疊紀早期，同時也是一種活化石植物。其相近親緣植物均盛產於恐龍稱霸的白堊紀時代，距今約6550萬年至1億4550萬年前，如Isoetites、Nathorstiana和Stylits現均已滅絕，獨留低矮草狀的水韭至今，故在植物分類學及演化學的研究上具有相當重要之地位。均已滅絕，獨留低矮草狀的水韭至今，故在植物分類學及演化學的研究上具有相當重要之地位。
, Isoetes taiwanensis är en kärlväxtart som beskrevs av De Vol. Isoetes taiwanensis ingår i släktet braxengräs, och familjen Isoetaceae. Utöver nominatformen finns också underarten I. t. kinmenensis.
, Isoetes taiwanensis is a species of plant … Isoetes taiwanensis is a species of plant in the family Isoetaceae. It is endemic to Taiwan, and the only species of quillwort there. As other quillworts, it is relatively small, with erect leaves 7–24 cm (2.8–9.4 in) long. It grows submersed in shallow ponds for most of the year. IUCN considers it critically endangered because of habitat loss.ically endangered because of habitat loss.
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Isoetes taiwanensis
, 台灣水韭
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