Table 1 Functional annotation of the differentially expressed contigs with two or more ESTs between the apical cells (a) and basal cells (b)

(a) Apical cell

ACC01

hypothetical protein

R. communis

XP_002531967

4.95E-14

ACC02

unknown protein

G. max

ACU24256

1.07E-19

ACC03

hypothetical protein

V. vinifera

CAN70790

1.53E-25

ACC04

hypothetical protein

N. tabacum

YP_173374

2.03E-35

ACC05

cytochrome P450 like protein

N. tabacum

BAA10929

2.32E-58

ACC06

histone h3

Z. mays

ACG25088

4.31E-27

ACC07

histone h2a

N. tabacum

BAC53941

3.89E-39

ACC08

40s ribosomal protein s23

S. tuberosum

ABB16993

1.83E-76

ACC09

histone h2a

N. tabacum

BAC53941

7.74E-38

ACC10

histone h2a

S. melongena

BAA85117

8.24E-26

ACC11

b-type cyclin

R. communis

XP_002530166

3.21E-14

ACC12

lipid transfer proteins related

V. vinifera

XP_002281585

9.59E-47

ACC13

dehydrin

N. tabacum

BAD13499

2.52E-27

ACC14

histone h3

B. floridae

XP_002595193

4.18E-26

ACC15

histone h4

E. japonica

ACX50406

1.71E-38

ACC16

atp-dependent helicase

V. vinifera

XP_002277541

7.63E-24

ACC17

3'-5' exonuclease

V. vinifera

XP_002277523

1.15E-46

ACC18

calmodulin

S. commersonii

P27161

8.15E-78

ACC19

cyclophilin

C. annuum

ACB05668

7.70E-48

ACC20

histone h2a

S. melongena

BAA85117

3.49E-25

ACC21

histone h3

M. pusilla

EEH57511

7.14E-14

ACC22

histone h4

P. sitchensis

ABK21562

7.32E-36

ACC23

histone h4

E. japonica

ACX50406

2.75E-29

ACC24

histone h4

E. japonica

ACX50406

2.01E-38

ACC25

40s ribosomal protein

S. tuberosum

ABA40465

1.04E-33

ACC26

60s ribosomal protein l23

T. aestivum

AAP80667

1.56E-61

ACC27

cytochrome P450 protein

C. lanatus

BAD26579

6.95E-25

ACC28

histone 2

V. vinifera

XP_002271506

2.52E-39

ACC29

histone 2

V. vinifera

XP_002271506

2.62E-39

ACC30

histone h2

G. max

ACU13572

9.67E-43

ACC31

histone h3

Z. mays

ACG25088

1.12E-06

ACC32

histone h3.3

S. salar

ACI68311

1.83E-25

ACC33

histone h4

E. japonica

ACX50406

1.25E-35

ACC34

hypothetical protein

V. vinifera

XP_002277580

2.19E-71

ACC35

hypothetical protein isoform 2

V. vinifera

XP_002269823

1.49E-07

ACC36

No hit

ACC37

polyubiquitin

A. thaliana

AAL09741

1.77E-36

ACC38

ribosomal protein s27

V. vinifera

XP_002273119

9.67E-35

ACC39

tabacum cDNA clone mRNA^a

N. tabacum

FS383363

1.04E-140

ACC40

tabacum cDNA clone mRNA^a

N. tabacum

AM808955

1.55E-86

ACC41

tabacum cDNA clone mRNA^a

N. tabacum

DW004611

1.12E-60

ACC42

ubiquitin extension protein

C. annuum

ABK42077

2.29E-69

ACC43

wox2 protein

Petunia × hybrida

ACA64094

1.28E-42

(b) Basal cell

BCC01

NADH dehydrogenase subunit 7

Beta vulgaris

NP_064055

1.72E-58

BCC02

No hit

BCC03

tabacum cDNA clone mRNA^a

N. tabacum

FG626245

1.69E-73

BCC04

hypothetical protein

R. communis

XP_002524507

1.46E-06

BCC05

pathogenesis-related protein 10

S. lycopersicum

BAD95797

5.62E-11

BCC06

cacao cDNA clone mRNA^a

T. cacao

CU503631

9.02E-45

BCC07

tabacum cDNA clone mRNA^a

N. tabacum

AM836152

0.00E+00

BCC09

acyl-COA-binding protein

V. vinifera

XP_002263421

3.10E-25

BCC10

eca1 protein

V. vinifera

XP_002275198

1.16E-27

BCC12

embryo abundant methyltransferase

P. trichocarpa

XP_002308901

4.35E-75

BCC13

sugar transport protein 8

V. vinifera

XP_002277946

1.62E-73

BCC14

tomato cDNA clone mRNA^a

L. esculentum

BW690013

5.37E-53

BCC15

tabacum cDNA clone mRNA^a

N. tabacum

FS398978

2.11E-162

BCC16

tabacum cDNA clone mRNA^a

N. tabacum

FS395950

3.79E-78

BCC17

tabacum cDNA clone mRNA^a

N. tabacum

FG623980

2.54E-102

BCC18

glutathione s-transferase

N. tabacum

P25317

4.85E-73

BCC19

nucleoside diphosphate kinase

N. tabacum

Q56E62

7.50E-11

BCC20

putative glucosyltransferase

L. esculentum

AAL92461

3.49E-37

BCC21

hypothetical protein

P. trichocarpa

XP_002330403

1.51E-22

BCC23

hypothetical protein

V. vinifera

XP_002284032

2.71E-21

BCC24

hypothetical protein

V. vinifera

XP_002284032

2.10E-21

BCC25

defender against cell death 1

N.suaveolens × N.tabacum

BAB40808

1.06E-17

BCC27

histone h3.3B isoform 2

C. intestinalis

XP_002131754

7.29E-22

BCC28

pollen allergen

R. communis

XP_002517629

5.29E-15

BCC29

acyl-COA-binding protein

V. vinifera

XP_002263421

1.39E-25

BCC30

60s ribosomal protein l35a

G. max

ACU13467

1.01E-24

BCC31

hypothetical protein

Escherichia

ZP_04532941

3.73E-10

BCC32

tabacum cDNA clone mRNA^a

N. tabacum

EB431770

2.73E-141

BCC33

tabacum cDNA clone mRNA^a

N. tabacum

EH623820

1.86E-137

BCC34

60s ribosomal protein l29

L. esculentum

AAG49033

4.56E-16

BCC35

hypothetical protein

V. vinifera

CAN81050

1.07E-09

BCC37

histone h3

N. vectensis

XP_001632617

1.62E-26

BCC38

No hit

BCC39

cell growth defect factor 2

V. vinifera

XP_002280550

6.60E-28

BCC40

tabacum cDNA clone mRNA^a

N. tabacum

AM834148

3.30E-147

BCC41

40s ribosomal protein s19

S. tuberosum

ABB87116

3.90E-28

BCC42

DNA-directed RNA polymerase II

R. communis

XP_002522014

1.67E-26

BCC43

nucleoside diphosphate kinase

N. tabacum

Q56E62

1.21E-21

BCC44

hypothetical protein

R. communis

XP_002532758

1.73E-15

BCC45

tabacum cDNA clone mRNA^a

N. tabacum

BP530929

4.41E-106

BCC46

No hit

BCC47

histone h3

C. clemensi

ACO15671

7.43E-27

BCC48

tabacum cDNA clone mRNA^a

N. tabacum

FS407739

2.26E-170