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单词 heterocyst
释义

heterocyst /'hetərə,sɪst//'hɛtərə,sɪst/

英汉-汉英词典
n. 异形细胞
词组 | 习惯用语
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  • heterozygous adj. 杂合的
  • heterosexual n. 异性恋者 adj. 异性恋的
  • heterodoxy n. 非正统;异端
  • heterodyne adj. 电外差的 vi. 致差, 成拍, 产生外差效果
heterocyst n. 异形胞;[植] 异形细胞,异形(囊)胞

网络短语:
heterocyst development 异形胞发育
heterocyst differentiation 胞分化
heterocyst t 异形细胞
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Heterocyst

Heterocysts are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as Nostoc punctiforme, Cylindrospermum stagnale, and Anabaena sphaerica. They fix nitrogen from dinitrogen (N2) in the air using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis. Nitrogenase is inactivated by oxygen, so the heterocyst must create a microanaerobic environment. The heterocysts' unique structure and physiology require a global change in gene expression. For example, heterocysts:

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