A phosphate starvation response regulator Ta-PHR1 is involved in phosphate signalling and increases grain yield in wheat
| Autor: | Jinkao Guo, Zhensheng Li, Mingqi He, Jun Miao, Yu Chen, Yiping Tong, Jing Wang, FangPu Han, Jinghan Sun, Bin Li, Zhanliang Shi, Xueqiang Zhao |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Transcriptional Activation
phosphate starvation response Molecular Sequence Data Triticum aestivum Arabidopsis Gene Expression Plant Science Biology lateral root chemistry.chemical_compound Botany PHR1 Phosphorus deficiency Biomass Common wheat Gene Triticum Plant Proteins Crop yield grain yield Lateral root food and beverages Phosphorus Original Articles Sequence Analysis DNA Phosphate Yeast Biochemistry chemistry Seeds phosphorus uptake Starvation response |
| Zdroj: | Annals of Botany |
| ISSN: | 1095-8290 0305-7364 |
| Popis: | † Background and Aims Phosphorus deficiency is a major limiting factor for crop yield worldwide. Previous studies revealed that PHR1 and it homologues play a key role in regulating the phosphate starvation response in plants. However, the function of PHR homologues in common wheat (Triticum aestivum) is still not fully understood. The aim of the study was to characterize the function of PHR1 genes in regulating phosphate signalling and plant growth in wheat. † Methods Wheat transgenic lines over-expressing a wheat PHR1 gene were generated and evaluated under phosphorus-deficient and -sufficient conditions in hydroponic culture, a soil pot trial and two field experiments. † Key Results Three PHR1 homologous genes Ta-PHR1-A1, B1 and D1 were isolated from wheat, and the function of Ta-PHR1-A1 was analysed. The results showed that Ta-PHR1-A1 transcriptionally activated the expression of Ta-PHT1.2 in yeast cells. Over-expressing Ta-PHR1-A1 in wheat upregulated a subset of phosphate starvation response genes, stimulated lateral branching and improved phosphorus uptake when the plants were grown in soil and in nutrient solution. The data from two field trials demonstrated that over-expressing TaPHR1-A1 increased grain yield by increasing grain number per spike. † Conclusions TaPHR1 is involved in phosphate signalling in wheat, and was valuable in molecular breeding of crops, with improved phosphorus use efficiency and yield performance. |
| Databáze: | OpenAIRE |
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