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Table 4 Biological processes with significant genes over-represented under mild or severe chromic N stress

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

Under mild N stress

Under severe N stress

   

No. in List

% in List

P-value

No. in List

% in List

P-value

Up-regulated

        

response to abiotic stimulus

1091

6.0

16

40

4.2E-10

39

19.3

7.3E-11

response to stress

945

5.2

14

35

6.4E-09

23

11.4

0.0004

secondary metabolism

249

1.4

6

15

1.6E-05

15

7.4

1.3E-07

response to oxidative stress

140

0.8

5

12.5

1.4E-05

8

4.0

0.0002

flavonoid biosynthesis

30

0.2

2

5

0.002

6

3.0

8.4E-07

anthocyanin biosynthesis

8

0.04

2

5

0.007

3

1.5

7.3E-05

phenylpropanoid biosynthesis

79

0.4

   

9

4.5

2.3E-07

response to abscisic acid stimulus

113

0.6

   

9

4.5

4.8E-06

organ senescence

12

0.07

   

3

1.5

0.0003

starch biosynthesis

7

0.04

   

2

1.0

0.002

Down-regulated

        

primary metabolism

5170

28.5

   

58

43.0

0.0002

biosynthesis

1269

7.0

   

28

20.7

1.6E-07

protein biosynthesis

500

2.8

   

17

12.6

1.9E-07

response to auxin stimulus

191

1.1

   

10

7.4

1.7E-06

generation of precursor metabolites and energy

451

2.5

   

10

7.4

0.002

nitrogen compound metabolism

276

1.5

   

7

5.2

0.005

response to cytokinin stimulus

31

0.2

   

5

3.7

3.1E-06

main pathways of carbohydrate metabolism

95

0.5

   

4

3.0

0.006

photosynthesis

44

0.2

   

3

2.2

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.