Table 1

Compilation of the number of nuclear encoded, chloroplast directed transgenomic suppressor functions (PPR proteins, sigma factors and phage type RNA polymerases) and of plastid genes encoded among plants and unicellular algae.

A. thaliana

P. trichocarpa

V. vinifera

O. sativa

P. patens

C. reinhardtii

O. tauri

O. lucimarinus

T. pseudonana

P. tricornutum

C. merolae


PPR proteins

482

641

610

491

110

13

19

22

46

50

8

Sigma 70 factors

6

9

6

6

6

1

1

1

4

5

4

Plastid genes

85

99

84

64

85

69

43

n.a.

141

132

207

PPR/plastid gene*

0.90

1.04

1.16

1.23

0.21

0.03

0.07

n.a.

0.05

0.06

0.006

Phage-type RNA polymerases

3

>3

3

2

3

1

1

1

1

1

1


*The PPR protein-plastid gene relations were determined under the assumption that in all taxa 16% of the PPR proteins are plastid proteins (as shown for A. thaliana in [35]).

n.a. = not applicable.

Maier et al. BMC Biology 2008 6:36   doi:10.1186/1741-7007-6-36

Open Data