Strigolactone is involved in nitric oxide-enhanced the salt resistance in tomato seedlings

Both strigolactones (SLs) and nitric oxide (NO) are regulatory signals with diverse roles during stress responses. At present, the interaction and mechanism of SLs and NO in tomato salt tolerance remain unclear. In the current study, tomato 'Micro-Tom' was used to study the roles and inter...

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Veröffentlicht in:Journal of plant research Jg. 135; H. 2; S. 337 - 350
Hauptverfasser: Liu, Huwei, Li, Changxia, Yan, Mei, Zhao, Zongxi, Huang, Panpan, Wei, Lijuan, Wu, Xuetong, Wang, Chunlei, Liao, Weibiao
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Singapore Springer Singapore 01.03.2022
Springer Nature B.V
Schlagworte:
Abiotic stress
antioxidant activity
antioxidant enzymes
Antioxidants
Antioxidants - metabolism
ascorbate peroxidase
Ascorbic acid
Biomedical and Life Sciences
Carotenoids
Catalase
Chlorophyll
Dioxygenase
Enzymatic activity
Enzyme activity
Enzymes
Gene expression
Genes
Glutathione
Glutathione reductase
glutathione-disulfide reductase
Heterocyclic Compounds, 3-Ring
Inhibitors
L-Ascorbate peroxidase
Lactones - metabolism
Lactones - pharmacology
Life Sciences
Lycopersicon esculentum
Nitric oxide
Nitric Oxide - metabolism
Peroxidase
Photosynthesis
Plant Biochemistry
Plant Ecology
Plant Physiology
Plant Sciences
Reductases
Regular Paper – Physiology/Biochemistry/Molecular and Cellular Biology
Salinity
Salinity effects
Salinity tolerance
salt stress
Salt tolerance
seedling growth
Seedlings
Seedlings - physiology
Signal transduction
stress tolerance
strigolactones
Superoxide dismutase
Tomatoes
S-Nitrosoglutathione
Antioxidant
Photosynthetic
Salinity
ISSN:0918-9440, 1618-0860, 1618-0860
Online-Zugang:Volltext
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Zusammenfassung:Both strigolactones (SLs) and nitric oxide (NO) are regulatory signals with diverse roles during stress responses. At present, the interaction and mechanism of SLs and NO in tomato salt tolerance remain unclear. In the current study, tomato 'Micro-Tom' was used to study the roles and interactions of SLs and NO in salinity stress tolerance. The results show that 15 μM SLs synthetic analogs GR24 and 10 μM NO donor S-nitrosoglutathione (GSNO) promoted seedling growth under salt stress. TIS108 (an inhibitor of strigolactone synthesis) suppressed the positive roles of NO in tomato growth under salt stress, indicating that endogenous SLs might be involved in NO-induced salt response in tomato seedlings. Meanwhile, under salt stress, GSNO or GR24 treatment induced the increase of endogenous SLs content in tomato seedlings. Moreover, GR24 or GSNO treatment effectively increased the content of chlorophyll, carotenoids and ascorbic acid (ASA), and enhanced the activities of antioxidant enzymes (superoxide dismutase, peroxidase, catalase, and ascorbate peroxidase), glutathione reductase (GR) and cleavage dioxygenase (CCD) enzyme. Additionally, GSNO or GR24 treatment also up-regulated the expression of SLs synthesis genes ( SlCCD7 , SlCCD8 , SlD27 and SlMAX1 ) and its signal transduction genes ( SlD14 and SlMAX2 ) in tomato seedlings under salt stress. While, a strigolactone synthesis inhibitor TIS108 blocked the increase of endogenous SLs, chlorophyll, carotenoids and ASA content, and antioxidant enzyme, GR, CCD enzyme activity and SLs-related gene expression levels induced by GSNO. Thus, SLs may play an important role in NO-enhanced salinity tolerance in tomato seedlings by increasing photosynthetic pigment content, enhancing antioxidant capacity and improving endogenous SLs synthesis.
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ISSN:0918-9440
1618-0860
1618-0860
DOI:10.1007/s10265-022-01371-2