Salt tolerance mechanisms in halophyte plant schrenkiella parvula
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- Tez No: 912902
- Danışmanlar: Belirtilmemiş.
- Tez Türü: Yüksek Lisans
- Konular: Belirtilmemiş.
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2021
- Dil: İngilizce
- Üniversite: Tohoku University
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 52
Özet
Soil salinity is one of the global problems caused by climate change and incorrect irrigation strategies. Some data estimate that increased salinity destroys 1.5 million hectares of agricultural fields each year, affecting approximately 50% of the fields by 2050. One solution to this global problem is to develop new crops that can adapt to high salt environment. Halophytes are salt-tolerant plants that grow in soil or waters of high salinity. Schrenkiella parvula is one of the halophyte plants that grows around Tuz (Salt) Lake, TURKEY. Intriguingly, Schrenkiella belongs to the same family as the model plant Arabidopsis thaliana, whose genome is 90% homologous to Arabidopsis genome. Therefore, comparing Arabidopsis and Schrenkiella will lead to the elucidation of the molecular mechanism of salt tolerance and will serve as a useful genetic resource related to salt tolerance in future. In my thesis, I performed proteomic analysis and physiological studies on the roots of Schrenkiella seedlings cultivated under 100 mM NaCl condition. Surprisingly, under 100 mM NaCl conditions, the roots of Schrenkiella parvula grew much faster than under 0 mM NaCl conditions. In contrast, DNA replication in roots meristems was significantly suppressed after the upshift of NaCl. That may be a strategy to reach lower salinity by promoting root elongation. Moreover, some stress-responsive and stress-tolerant proteins increased, similar to those of Arabidopsis thaliana. In contrast, I was able to find Schrenkiella-specific responses, including activation of proline catabolism and no activation of autophagy in the roots exposed to NaCl. These results indicate that multiple adaptive mechanisms have been developed to avoid Na+ toxicity in the Schrenkiella parvula
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