Improved Plant Nitrate Status Involves in Flowering Induction by Extended Photoperiod
| Autor: | Qing Yang Zhu, Jia Yuan Ye, Chong Wei Jin, Wen Hao Tian, Miao Zhou, Wen Xin Du |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine endocrine system suboptimal nitrate supply Nitrogen assimilation FLOWERING LOCUS T Mutant Plant Science Biology lcsh:Plant culture 01 natural sciences nitrogen 03 medical and health sciences chemistry.chemical_compound Nutrient CONSTANS Nitrate Arabidopsis Ammonium lcsh:SB1-1110 nitrate uptake reproductive and urinary physiology Original Research photoperiodism Nitrate uptake fungi food and beverages biology.organism_classification Horticulture 030104 developmental biology photoperiodic flowering responses chemistry NRT2.1 NRT1.1 010606 plant biology & botany |
| Zdroj: | Frontiers in Plant Science, Vol 12 (2021) Frontiers in Plant Science |
| Popis: | The floral transition stage is pivotal for sustaining plant populations and is affected by several environmental factors, including photoperiod. However, the mechanisms underlying photoperiodic flowering responses are not fully understood. Herein, we have shown that exposure to an extended photoperiod effectively induced early flowering in Arabidopsis plants, at a range of different nitrate concentrations. However, these photoperiodic flowering responses were attenuated when the nitrate levels were suboptimal for flowering. An extended photoperiod also improved the root nitrate uptake of by NITRATE TRANSPORTER 1.1 (NRT1.1) and NITRATE TRANSPORTER 2.1 (NRT2.1), whereas the loss of function of NRT1.1/NRT2.1 in the nrt1.1-1/2.1-2 mutants suppressed the expression of the key flowering genes CONSTANS (CO) and FLOWERING LOCUS T (FT), and reduced the sensitivity of the photoperiodic flowering responses to elevated levels of nitrate. These results suggest that the upregulation of root nitrate uptake during extended photoperiods, contributed to the observed early flowering. The results also showed that the sensitivity of photoperiodic flowering responses to elevated levels of nitrate, were also reduced by either the replacement of nitrate with its assimilation intermediate product, ammonium, or by the dysfunction of the nitrate assimilation pathway. This indicates that nitrate serves as both a nutrient source for plant growth and as a signaling molecule for floral induction during extended photoperiods. |
| Databáze: | OpenAIRE |
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