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PpSARK Regulates Moss Senescence and Salt Tolerance through ABA Related Pathway
Li, Ping1,2; Yang, Hong1,2; Liu, Gaojing1; Ma, Wenzhang1; Li, Chuanhong3,4; Huo, Heqiang5; He, Jianfang1,2; Liu, Li1
AbstractSenescence-associated receptor-like kinase (SARK) family members in Arabidopsis, soybean, and rice are known to be positive regulators of leaf senescence. In the meantime, SARKs are extensively involved in stress response. However, their function and underlying molecular mechanism in stress responses in moss are not well known. Here, we investigated functional roles of SARK isolated from Physcomitrella patens (PpSARK) in salt stress response and senescence. PpSARK transcripts significantly accumulated under NaCl and abscisic acid (ABA) treatments, with higher expression in the moss gametophyte stage. Insertional gain-of-function mutants of PpSARK (PpSARKg) were more tolerant to salt stress and ABA than wild type (WT), whereas senescence of mutants was delayed during the protonema stage. Expression of stress-responsive genes in the ABA related pathway, such as PpABI3, PpABI5, PpPP2C, and PpLEA were significantly higher in PpSARKg and WT under salt stress conditions, suggesting that PpSARK might positively regulate salt tolerance via an ABA-related pathway. Endogenous ABA contents also increased 3-fold under salt stress conditions. These results indicate that PpSARK functions as a positive regulator in salt stress responses, while possibly functioning as a negative regulator in senescence in moss.
Keywordsenescence salt stress response ABA SARK moss (Physcomitrella patens)
Indexed BySCI
Document Type期刊论文
Corresponding AuthorLiu, Li
Affiliation1.Chinese Acad Sci, Key Lab Econ Plants & Biotechnol, Yunnan Key Lab Wild Plant Resources, Germplasm Bank Wild Species,Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China
4.Huazhong Agr Univ, Natl Ctr Plant Gene Res, Wuhan 430070, Peoples R China
5.Univ Florida, Dept Environm Hort, Mid Florida Res & Educ Ctr, Apopka, FL 32703 USA
Recommended Citation
GB/T 7714
Li, Ping,Yang, Hong,Liu, Gaojing,et al. PpSARK Regulates Moss Senescence and Salt Tolerance through ABA Related Pathway[J]. INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES,2018,19(9):9.
APA Li, Ping.,Yang, Hong.,Liu, Gaojing.,Ma, Wenzhang.,Li, Chuanhong.,...&Liu, Li.(2018).PpSARK Regulates Moss Senescence and Salt Tolerance through ABA Related Pathway.INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES,19(9),9.
MLA Li, Ping,et al."PpSARK Regulates Moss Senescence and Salt Tolerance through ABA Related Pathway".INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 19.9(2018):9.
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