Table 5.2.

Introns affecting transgene expression in different plants

Intron	Specificity	Remark	Reference
COX 5c-1	Arabidopsis	Increased GUS expression level	Curi et al. (2005)
COX 5c-2
Ubi7	Potato	Ten-fold higher expression	Garbarino et al. (1995)
Adh1	Maize	40–100-fold increase in expression	Callis et al. (1987)
Act1	Arabidopsis	High level of reproductive tissue expression	Vitale et al. (2003)
RBCS2	Chlamydomonas reinhardtii	Stable high-level expression	Lumbreras et al. (1998)
reg A3	Volvox carteri	Required for regA expression	Stark et al. (2001)
regA5
STK	Arabidopsis	Intron-mediated promoter expression in ovules and septum	Kooiker et al. (2005)
VRN-1	Wheat	Essential for promoter activity	Fu et al. (2005)
Ostub 16	Rice	Required for maximum promoter activity	Morello et al. (2002)
OsCDPK 2	Rice	Required for promoter activity	Morello et al. (2006)
PpAct 1	Physcomitrella patens	11–18-fold higher expression	Weise et al. (2006)
PpAct 5
PpAct 7
Sh1	Maize	10–1,000-fold enhanced expression	Maas et al. (1990, 1991)
Gap A1	Maize	Required for full promoter activity	Donath et al. (1995)
Actin 3rd intron	Maize	IME	Luehrsen and Walbot (1991)
Hsp81	Maize	IME	Sinibaldi and Mettler (1992)
Act 1	Rice	IME	McElroy et al. (1990)
tpi	Rice	Required for promoter activity	Xu et al. (1994)