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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zhang, Wentao Gusta, Lawrence V. |
| Copyright Year | 2009 |
| Abstract | Seed quality is a key critical component to produce well established and vigorous seedlings under cool soil (<10°C) conditions experienced in Western Canada. A simple, relatively quick germination assay is required to separate small differences in seed germination which can have a significant impact on seedling growth. It has long been established that phytohormones regulate seed germination: abscisic acid inhibits germination whereas gibberellins enhance germination. We investigated the effects of ABA, GA, ethylene and inhibitors of these phytohormones alone and in combination on the germination rate of a black and a yellow seed canola (Brassica napus) imbibed at 8°C. The effects of either saline solutions, osmotic solutions, fusicoccin or testa on the germination of canola seeds imbibed at 8°C were also investigated. This temperature is representative of the soil temperatures experienced in the early spring of Western Canada. The two canola seed lines, especially the yellow seed line, were very sensitive to increasing concentration of saline solutions at 8°C, but not at 23°C; however, iso-osmotic solutions that reduced water potential were more inhibitory. The seed coat (testa) including the endosperm was a major factor affecting the germination rate of the yellow seed line at 8°C, however, GA4+7 overcame the inhibitory effect of the testa, whereas ABA exacerbated it. Fusicoccin was more stimulatory to germination than GA4+7, however, unlike GA4+7, it was unable to overcome the inhibitory effect of paclobutrazol, a GA biosynthesis inhibitor. Fluridone, an ABA biosynthesis inhibitor, was unable to overcome the inhibitory effects of a saline solution suggesting that the inhibitory effect was not due to elevated ABA levels. Ethylene, a stimulator of germination did not appear to be involved in the germination of these two lines. Controlled deterioration at 35°C, 85% RH could be either partially or completely overcome by exogenous GA4+7. This study demonstrated the effect of hormones, salinity and testa on the germination of canola seeds under less than ideal environmental conditions. |
| Starting Page | 105 |
| Ending Page | 114 |
| Page Count | 10 |
| File Format | |
| ISSN | 01676903 |
| Journal | Plant Growth Regulation |
| Volume Number | 60 |
| Issue Number | 2 |
| e-ISSN | 15735087 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2009-12-10 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Abscisic acid Alkalinity Brassica napus Canola Gibberellin Testa Agriculture Plant Physiology Plant Anatomy/Development Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Plant Science Agronomy and Crop Science |
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