| Title |
Loss of function of four DELLA genes leads to light- and gibberellin-independent seed germination in Arabidopsis
|
|---|---|
| Published in |
Planta, July 2005
|
| DOI | 10.1007/s00425-005-0057-3 |
| Pubmed ID | |
| Authors |
Dongni Cao, Alamgir Hussain, Hui Cheng, Jinrong Peng |
| Abstract |
The Arabidopsis severe gibberellin-deficient mutant ga1-3 does not germinate even when the optimal light and temperature conditions are provided. This fact suggests that (1) gibberellin (GA) is absolutely necessary for the germination of an intact seed and (2) the ga1-3 mutant can be used as a good system to identify factors that repress seed germination. In this report, using ga1-3 mutation as the genetic background, we confirm that RGL2, one member of the DELLA family, encodes the predominant repressor of seed germination in Arabidopsis and show that the other DELLA genes GAI,RGA and RGL1 enhance the function of RGL2. More importantly, we show that ga1-3 seeds lacking RGA, RGL1 and RGL2 or GAI, RGL1 and RGL2, confer GA-independent germination in the light but not in the darkness whilst ga1-3 seeds lacking GAI, RGA and RGL2 germinate both in the light and darkness. This suggests that the destabilization or inactivation of RGA and GAI is not only triggered by GA but also possibly by light. In addition, ga1-3 seeds lacking in all the aforementioned four DELLA genes have elongated epidermal cells and confer light-, cold- and GA-independent seed germination. Therefore, DELLA proteins likely act as integrators of environmental and endogenous cues to regulate seed germination. |
Mendeley readers
The data shown below were compiled from readership statistics for 120 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Spain | 1 | <1% |
| China | 1 | <1% |
| Germany | 1 | <1% |
| Unknown | 117 | 98% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 30 | 25% |
| Researcher | 22 | 18% |
| Student > Bachelor | 10 | 8% |
| Professor > Associate Professor | 9 | 8% |
| Student > Master | 9 | 8% |
| Other | 23 | 19% |
| Unknown | 17 | 14% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 70 | 58% |
| Biochemistry, Genetics and Molecular Biology | 25 | 21% |
| Immunology and Microbiology | 2 | 2% |
| Environmental Science | 1 | <1% |
| Social Sciences | 1 | <1% |
| Other | 0 | 0% |
| Unknown | 21 | 18% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 01 July 2008.
All research outputs
#7,454,298
of 22,789,076 outputs
Outputs from Planta
#599
of 2,718 outputs
Outputs of similar age
#20,107
of 57,268 outputs
Outputs of similar age from Planta
#8
of 31 outputs
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