Table 3 Effect of spermidine application on endogenous polyamines content of the young panicles at different temperatures before heading.

From: Spermidine Enhanced Free Polyamine Levels and Expression of Polyamine Biosynthesis Enzyme Gene in Rice Spikelets under Heat Tolerance before Heading

Temperature

Spd

Put (nmol g-1FW)

Spd (nmol g−1FW)

Spm (nmol g−1FW)

5 d

10 d

5 d

10 d

5 d

10 d

NT

−Spd

123.3 ± 1.6 a

32.3 ± 0.1 a

564.3 ± 3.9 a

153.2 ± 0.4 d

84.5 ± 3.2 d

54.9 ± 0.2 d

 

+Spd

63.9 ± 0.1 c

19.0 ± 0.1 b

463.3 ± 2.2 b

172.9 ± 0.3 c

130.0 ± 0.7 c

79.9 ± 1.5 c

HT

−Spd

84.8 ± 1.2 b

12.9 ± 4.8 b

378.5 ± 1.0 c

209.1 ± 21.0 b

172.8 ± 6.7 b

97.4 ± 8.5 b

 

+Spd

21.9 ± 0.5 d

8.0 ± 0.1 c

525.2 ± 4.6 a

251.8 ± 0.5 a

860.8 ± 13.0 a

153.4 ± 1.8 a

  1. Means±SDs were calculated from the data of three repeats. Values followed by different letters within the same column are significantly different at P < 0.05 between the different treatments, including temperature and Spd. 5 d and 10 d in the table were 5 days and 10 days after HT treatment, respectively.
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