土壤干旱胁迫明显提高了喜树幼苗根、茎、叶中的喜树碱含量。
But soil drought stress increases CPT concentration in the leaves, stems and roots of the seedlings.
碱：在溶液中可形成氢氧根离子的可溶性物质。例如氢氧化钠或氢氧化钾。
Alkali: a soluble matter that forms hydroxyl ions in solution. e. g. NaOH or KOH.
其中不定根中的总生物碱含量高于愈伤组织和不定芽丛。
And the contents of total alkaloid in adventitious roots is higher than that in calli and buds.
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