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Table 5 Biological processes with significant genes over-represented after short- and long-term N availability increase

From: Global transcription profiling reveals differential responses to chronic nitrogen stress and putative nitrogen regulatory components in Arabidopsis

Biological Process

No. in Genome

% in Genome

2 hr N increase

24 hr N increase

   

No. in List

% in List

P-value

No. in List

% in List

P-value

Up-regulated

        

transport

1398

7.7

11

20.4

0.002

   

cell homeostasis

64

0.4

3

5.6

0.0009

   

nitrate assimilation

7

0.04

2

3.7

0.0002

   

sulfate assimilation

11

0.06

2

3.7

0.0005

   

response to carbohydrate stimulus

29

0.16

2

3.7

0.003

   

primary metabolism

5170

28.5

   

203

54.7

1.0E-26

protein biosynthesis

500

2.8

   

121

32.6

4.2E-98

organelle organization and biogenesis

439

2.4

   

45

12.1

3.5E-19

ribosome biogenesis and assembly

117

0.6

   

34

9.2

5.9E-30

translation

136

0.7

   

13

3.5

4.4E-06

response to auxin stimulus

191

1.1

   

12

3.2

0.0006

nucleosome assembly

56

0.3

   

9

2.4

1.8E-06

DNA packaging

106

0.6

   

9

2.4

0.0003

translational elongation

31

0.2

   

8

2.2

1.5E-07

nitrogen compound metabolism

124

0.7

   

8

2.2

0.004

amino acid biosynthesis

99

0.5

   

7

1.9

0.004

ribonucleotide biosynthesis

45

0.2

   

5

1.3

0.002

chlorophyll biosynthesis

14

0.08

   

4

1.1

0.0001

response to cytokinin stimulus

31

0.2

3

5.6

0.0001

4

1.1

0.003

Down-regulated

        

response to abiotic stimulus

1091

6.0

   

40

15.5

3.2E-08

secondary metabolism

249

1.4

   

14

5.4

1.4E-05

response to abscisic acid stimulus

113

0.6

   

11

4.3

6.3E-07

phenylpropanoid biosynthesis

79

0.4

   

7

2.7

0.0001

flavonoid biosynthesis

30

0.2

   

5

1.9

6.0E-05

anthocyanin biosynthesis

8

0.04

1

10

0.004

3

1.2

0.0002

starch biosynthesis

7

0.04

   

2

0.8

0.004

  1. The gene list was imported into GeneSpring. The number of genes in each biological process either in a whole genome (No. in Genome), or in the list (No. in list), as well as their corresponding percentage and p-value was generated by GeneSpring.