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Genetic Diversity and Synergistic Modulation of Salinity Tolerance Genes in Aegilops tauschii Coss
| Content Provider | MDPI |
|---|---|
| Author | Abbas, Adeel Yu, Haiyan Cui, Hailan Li, Xiangju |
| Copyright Year | 2021 |
| Description | Aegilops tauschii Coss. (2n = 2x = 14, DD) is a problematic weed and a rich source of genetic material for wheat crop improvement programs. We used physiological traits (plant height, dry weight biomass, $Na^{+}$ and $K^{+}$ concentration) and 14 microsatellite markers to evaluate the genetic diversity and salinity tolerance in 40 Ae. tauschii populations. The molecular marker allied with salinity stress showed polymorphisms, and a cluster analysis divided the populations into different groups, which indicated diversity among populations. Results showed that the expression level of AeHKT1;4 and AeNHX1 were significantly induced during salinity stress treatments (50 and 200 mM), while AeHKT1;4 showed relative expression in roots, and AeNHX1 was expressed in leaves under the control conditions. Compared with the control conditions, the expression level of AeHKT1;4 significantly increased 1.7-fold under 50 mM salinity stress and 4.7-fold under 200 mM salinity stress in the roots of Ae. tauschii. AeNHX1 showed a relative expression level of 1.6-fold under 50 mM salinity stress and 4.6-fold under 200 mM salinity stress compared with the control conditions. The results provide strong evidence that, under salinity stress conditions, AeHKT1;4 and AeNHX1 synergistically regulate the $Na^{+}$ homeostasis through regulating $Na^{+}$ transport in Ae. tauschii. AeNHX1 sequestrated the $Na^{+}$ into vacuoles, which control the regulation of $Na^{+}$ transport from roots to leaves under salinity stress conditions in Ae. tauschii. |
| Starting Page | 1393 |
| e-ISSN | 22237747 |
| DOI | 10.3390/plants10071393 |
| Journal | Plants |
| Issue Number | 7 |
| Volume Number | 10 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-07-07 |
| Access Restriction | Open |
| Subject Keyword | Plants Horticulture Aegilops Tauschii Coss Stress Tolerance Salinity Genes Abiotic Stress Microsatellite Markers |
| Content Type | Text |
| Resource Type | Article |
