Histological analyses in 155 plants demonstrate that 1) CZ of 10-day-old seedlings in 155 was almost flat, which was not as vaulted as C24. 2) At day 21, the CZ was vaulted, but the PZ (peripheral zone) lost its original uphill hogback.

 
  • 突變體莖頂端分生組織(shoot apical meristem,SAM)的石蠟切片觀(guān)察表明:1)10d苗齡155的SAM扁平,不像野生型形成拱形; 2)21d時(shí),155的SAM和C24一樣呈拱形,但是SAM的兩側PZ(peripheral zone)較野生型平坦。
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