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. 2003 Feb;131(2):507–515. doi: 10.1104/pp.014258

Table II.

Seed phytic acid and inorganic phosphate in the ZmIpk Mu-insertion mutants

F2 Seeds PCR Pi PAP Pi Mean PAP Mean Pi Increase PAP Reduction
1.3-kb fragment mg g−1 -fold %
ZmIpk-mum1−01 + 0.33 2.44
ZmIpk-mum1−02 + 0.12 2.44
ZmIpk-mum1−05 + 0.14 2.46
ZmIpk-mum1−06 + 0.26 2.37
ZmIpk-mum1−07 + 0.21 2.28
ZmIpk-mum1−08 + 0.24 2.62 0.22 2.44
ZmIpk-mum1−03 0.90 1.56
ZmIpk-mum1−04 0.65 1.72
ZmIpk-mum1−09 0.89 1.94
ZmIpk-mum1−10 0.86 1.80 0.82 1.75 2.8 28
ZmIpk-mum2−01 + 0.10 3.15
ZmIpk-mum2−02 + 0.14 2.54
ZmIpk-mum2−04 + 0.10 2.82
ZmIpk-mum2−05 + 0.10 2.62
ZmIpk-mum2−07 + 0.16 2.69
ZmIpk-mum2−08 + 0.11 2.41
ZmIpk-mum2−09 + 0.16 2.73
ZmIpk-mum2−10 + 0.07 3.16 0.12 2.76
ZmIpk-mum2−03 0.66 2.06
ZmIpk-mum2−06 0.69 1.78 0.67 1.92 4.7 30
ZmIpk-mum3−01 + 0.17 2.29
ZmIpk-mum3−02 + 0.12 2.15
ZmIpk-mum3−03 + 0.19 2.21
ZmIpk-mum3−04 + 0.18 2.11
ZmIpk-mum3−07 + 0.21 1.95
ZmIpk-mum3−08 + 0.15 2.02
ZmIpk-mum3−09 + 0.12 2.12
ZmIpk-mum3−10 + 0.14 2.21 0.16 2.13
ZmIpk-mum3−05 0.51 1.53
ZmIpk-mum3−06 0.52 1.45 0.52 1.49 2.2 30

Individual F2 mature seeds from an ear were analyzed for inorganic phosphate and phytic acid. The Pi and phytic acid are expressed as Pi P and phytic acid P (PAP), respectively. PCR was conducted with primers flanking the ZmIpk open reading frame, and a product of 1.3-kb fragment is expected for intact ZmIpk.