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小梗

在真菌學中,小梗又名擔孢子梗,是連接孢子(綠色)和擔子(紅色)的細長延伸部分。

在生物學上, 小梗是一種小型支撐結構。

即使葉子已經掉落,小梗仍留在雲杉鐵杉的細枝上。

這個名詞通常用在真菌學中,而它會被殊稱為擔孢子梗,因為它是指擔子(携带孢子的细胞)的延伸,由基部絲狀部分和細長突起的部份組成,突起部份的尖端帶有孢子[1]。 當擔子發育並經歷減數分裂時,在擔子上產生(通常)四個细胞核。細胞核逐漸遷移到擔子的尖端,每一個細胞核都將遷移到一個擔孢子梗所承托的孢子[2]


在植物學中,小梗也可以指部份针叶树品種,特别是云杉铁杉葉子基部的莖狀結構,也稱為“木栓”[3]

參考文獻

[编辑]
  1. ^ Kirk PM, Cannon PF, Minter DW, Stalpers JA. Dictionary of the Fungi 10th. Wallingford, UK: CABI英语CABI (organisation). 2008: 665. ISBN 978-0-85199-826-8. 
  2. ^ Ammirati J, Traquair JA, Horgen PA. Poisonous Mushrooms of the Northern United States and Canada. Minneapolis: Fitzhenry & Whiteside in cooperation with Agriculture Canada. 1985: 28. ISBN 978-0-88902-977-4. 
  3. ^ Eckenwalder JE. Conifers of the World: The Complete Reference. Portland: Timber Press. 2009. ISBN 978-0-88192-974-4. 
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小梗
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