In fact the fruit spot of the pear was one of phellem (the cork cells) formed by cambium of phellem of the periderm.

 
  • 有些地方由于大量木栓細胞的產(chǎn)生,并突出于果實(shí)表面,形成了所謂果點(diǎn),其實(shí)這該認為是表皮上面大小不同的皮孔。
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