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. 2013 Oct 29;8(10):e78196. doi: 10.1371/journal.pone.0078196

Table 2. Polyamine effects on the maximum grain filling rate (Gmax), mean grain filling rate (Gmean), and maximum grain weight (Wmax) of winter wheat.

Zhoumai 18 Xinong 538
S1 S2 P1 CK S1 S2 P1 CK
Gmax (mg per grain d−1) 2.74a 2.73a 2.23b 2.28b 2.16a 2.16a 1.86b 1.84b
Gmean (mg per grain d−1) 2.15a 2.15a 1.95b 1.94b 1.76a 1.77a 1.42b 1.40b
Wmax (mg) 52.6a 52.5a 49.4b 48.5b 42.3a 42.3a 39.4b 39.8b

Values in each row for the same cultivar followed by different letters are significantly different at P = 0.05. S1: external application of Spd on panicles; S2: external application of Spm on panicles; P1: external application of Put on panicles.