Table 1 Distributions of six functional-group pollen-preferential transcripts in the five clusters.

01 Trancription factor

176

282

133

89

92

772

01.01 ABI3VP1

4

8

6

4

2

24

01.02 Alfin-like

1

1

0

2

1

5

01.03 AP2-EREBP

18

25

11

4

5

63

01.04 ARF

1

1

2

1

3

8

01.05 ARID

1

1

0

0

0

2

01.06 ARR-B

0

1

0

0

0

1

01.07 BES1

0

2

1

0

0

3

01.08 bHLH

11

23

10

5

2

51

01.09 bZIP

9

9

5

2

0

25

01.10 C2C2-CO-like

1

0

0

0

1

2

01.11 C2C2-Dof

5

7

0

0

0

12

01.12 C2C2-GATA

2

5

0

1

2

10

01.13 C2C2-YABBY

1

1

0

1

0

3

01.14 C2H2

12

18

9

6

9

54

01.15 C3 H

4

11

1

2

9

27

01.16 C3HC4

1

0

1

3

1

6

01.17 CCAAT_HAP2

0

2

1

0

0

3

01.18 CCAAT_HAP3

1

4

0

1

0

6

01.19 CCAAT_HAP5

2

2

0

3

2

9

01.20 CPP

1

2

1

0

1

5

01.21 CSD

0

0

0

0

1

1

01.22 DBP

0

3

0

1

0

4

01.23 DDT

3

0

3

0

1

7

01.24 G2-like

3

3

2

1

2

11

01.25 GeBP

1

0

0

1

0

2

01.26 GRAS

6

6

6

2

0

20

01.27 GRF

0

1

0

0

0

1

01.28 HB

7

15

5

5

0

32

01.29 HMG

0

1

1

0

2

4

01.30 HRT

0

1

0

0

0

1

01.31 HSF

2

1

1

1

1

6

01.32 Jumonji

3

2

1

2

0

8

01.33 LFY

0

1

0

0

0

1

01.34 LIM

0

3

0

0

0

3

01.35 LUG

0

0

1

0

0

1

01.36 MADS

10

13

8

5

8

44

01.37 MYB and MYB-related

20

26

18

7

12

83

01.38 NAC

9

26

8

2

6

51

01.39 Orphans

14

17

10

2

2

45

01.40 PHD

4

5

3

4

2

18

01.41 PLATZ

1

0

1

1

0

3

01.42 Pseudo ARR-B

0

1

0

0

0

1

01.43 PWP-RK

1

4

0

0

0

5

01.44 SBP

1

1

2

0

0

4

01.45 SET

3

2

2

6

7

20

01.46 S1Fa-like

0

0

0

2

0

2

01.47 SNF2

4

3

2

3

6

18

01.48 TAZ

0

0

0

0

1

1

01.49 TCP

3

3

2

0

2

10

01.50 Trihelix

0

4

1

0

0

5

01.51 TUB

1

1

1

3

0

6

01.52 ULT

0

0

1

1

0

2

01.53 WRKY

3

9

3

4

1

20

01.54 zf-HD

2

3

2

0

0

7

01.55 ZIM

0

4

1

1

0

6

02 Phytohormone

31

52

28

25

10

146

02.01 Auxin

13

31

16

13

7

80

02.02 BR

3

2

2

2

1

10

02.03 Cytokinin

2

3

3

0

0

8

02.04 Ethylene

6

13

3

3

2

27

02.05 GA

3

2

0

6

0

11

02.06 JA

4

1

4

1

0

10

03 Cell cycle

36

63

30

25

43

197

04 Kinase

110

319

116

78

43

666

04.01 Calcium

4

19

2

6

2

33

04.02 Inositol phosphate

6

21

7

5

0

39

04.03 MAPK

1

11

1

3

0

16

04.04 Pto-pti

1

5

0

1

0

7

04.05 Receptor kinase

46

83

43

20

5

197

04.06 WAK

10

14

10

1

2

37

04.07 Others

42

166

53

42

34

337

05 Defense/stress response

107

172

109

51

35

474

06 UPS

107

155

100

65

176

603

06.01 F-box

75

103

71

49

108

406

06.02 Others

32

52

29

16

68

197