Botany Department, Monash University, 3168, Clayton, Victoria, Australia.
Planta. 1977 Jan;134(2):207-8. doi: 10.1007/BF00384974.
Leaves of Triticum aestivum L. were exposed to (14)CO2. The (14)C activity in lignified sieve elements was not above background levels, whereas it was significnatly higher in normal sieve elements and companion cells.
小麦叶片暴露于（14）CO2 中。木质部筛分子中的（14）C 活性没有高于背景水平，而在正常筛分子和伴胞中则显著更高。
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