Table 1.
SUS genes associated with sink strength
| Species | SUS gene | Locus | Subfamily | Functional or phenotypic description | Reference | |
|---|---|---|---|---|---|---|
| Mutant | Maize | ZmSus1 (L22296) | GRMZM2G152908 | SUS I | ZmSus1 product is needed mainly for generating precursors for starch biosynthesis. | Chourey et al.,1998 |
| Maize | ZmSus2 (X02400) | GRMZM2G089713 | SUS I | ZmSus2 product performs a critical role in providing the substrate for cellulose biosynthesis. | Chourey et al.,1998 | |
| Bea | Sus1(AJ012080) | SUS I | Pea mutants (rug4) lacking an isoform (Sus1) very similar to SUS1 and SUS4 of Arabidopsis have reduced seed mass and starch content. | Craig et al., 1999; Barratt et al., 2001 | ||
| Antisense repression | Potato | StSus4 (M18745) | PGSC0003DMG400002895 | SUS I | Antisense inhibition of the main isoform SUS (Sus4) in potato tubers drastically reduces starch accumulation. | Zrenner et al.,1995 |
| Tomato | SlSus1 (L19762) | Solyc12g009300.1 | SUS I | Antisense inhibition of tomato fruit SUS (SlSus1) decreases fruit setting and the sucrose unloading capacity of young fruit. | D’Aoust et al., 1999 | |
| Cotton | GhSus1 (U73588) | Gohir.A05G036000 | SUS I | Suppression of SUS gene expression represses cotton fiber cell initiation, elongation, and seed development. | Ruan et al., 2003 | |
| Carota | SUS gene (X75332) | DCAR_028527 | SUS I | Antisense repression of SUS affects the size of carrot plants and the biosynthesis of cellulose and starch. | Tang et al., 1999 | |
| Overexpression | Potato | StSus4 (M18745), potato | PGSC0003DMG400002895 | SUS I | Enhancing SUS activity in potato tubers results in increased levels of starch, ADP-glucose and UDP-glucose and total yield. | Baroja-Fernández et al., 2009 |
| Maize | StSus4 (M18745), potato | PGSC0003DMG400002895 | SUS I | Enhancing SUS activity results in increased levels of starch and ADP-glucose in maize seed endosperms. | Li et al., 2013 | |
| Cotton | StSus4 (M18745), potato | PGSC0003DMG400002895 | SUS I | Overexpression of a potato SUS gene in cotton accelerates leaf expansion, reduces seed abortion, and enhances fiber production. | Xu et al., 2012 | |
| Poplar | GhSus1 (U73588), cotton | Gohir.A05G036000 | SUS I | SUS affects carbon partitioning to increase cellulose production. | Coleman et al., 2009 | |
| Cotton | GhSusA1(HQ702185), cotton | Gohir.D08G139000 | SUS II | Overexpression of GhSusA1 increases plant biomass and improves cotton fiber yield and quality. | Jiang et al., 2012 |