Abstract:
KEY MESSAGE:Overexpression of SoSnRK2.1 improved drought tolerance and growth of tobacco plants. Sucrose non-fermenting1-related protein kinase 2 (SnRK2) is a key enzyme in regulating ABA signal transduction in plants, and it plays a significant role in response to multiple abiotic stresses. In this research, SoSnRK2.1 gene was cloned from sugarcane variety GT21 and characterized under various stresses. The cloned SoSnRK2.1 gene has a complete open reading frame of 1002 bp, encoding a peptide of 333 amino acids. The amino acid sequence of SoSnRK2.1 has high homology with those of Zea mays and Oryza sativa, which belongs to SnRK2 s families. The expression of SoSnRK2.1 under stresses of drought, PEG, and ABA indicated that this gene is involved in stress responses in sugarcane. To investigate the gene function, fusional SoSnRK2.1-GFP-pBI121 under control of CaMV 35S was transformed into tobacco plants. Growth and morphology of transgenic plants demonstrated that overexpression of SoSnRK2.1 enhanced drought tolerance in tobacco. Transgenic tobacco plants had lower levels of ion leakage (IL), and contents of maleic dialdehyde (MDA) and H2O2, with higher activities of three antioxidant enzymes, superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT), and chlorophyll and relative water content (RWC) than those in wide type (WT) tobacco. SoSnRK2.1 was stably transmitted to the next generation via sexual reproduction. Though the data presented here are from a heterologous system, it is highly likely that SoSnRK2.1 is involved in the abiotic stress response in sugarcane and may be playing an important role in regulation of its growth.
journal_name
Plant Cell Repjournal_title
Plant cell reportsauthors
Phan TT,Sun B,Niu JQ,Tan QL,Li J,Yang LT,Li YRdoi
10.1007/s00299-016-2004-0subject
Has Abstractpub_date
2016-09-01 00:00:00pages
1891-905issue
9eissn
0721-7714issn
1432-203Xpii
10.1007/s00299-016-2004-0journal_volume
35pub_type
杂志文章abstract::Plant regeneration via somatic embryogenesis was achieved in callus cultures derived from nodal explants of in vitro grown seedlings and excised mature zygotic embryos of three bamboo species on Murashige and Skoog's (MS) basal medium supplemented with 0.5 mg/l kinetin (Kn), 2.0 mg/l 2,4-dichlorophenoxyacetic acid (2,...
journal_title:Plant cell reports
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journal_title:Plant cell reports
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更新日期:2008-07-01 00:00:00
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