期刊
PLANT SCIENCE
卷 256, 期 -, 页码 112-119出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2016.11.001
关键词
CitERF13; Photosynthesis; Chlorophyll fluorescence; Citrus
资金
- National Key Research and Development Program [2016YFD0400100]
- Program of International Science and Technology Cooperation [2011DFB31580]
- National Basic Research Program of China [2011CB100602]
Ethylene responsive factors (ERFs) act as critical downstream components of the ethylene signalling pathway in regulating plant development and stress responses. However little is known about its role in regulation of photosynthesis. Here, we identified an ethylene-inducible ERF gene in citrus, CitERF13. Transient over-expression of CitERF13 in N. tabacum leaves, resulted in a significant decrease in net photosynthetic rate. Closer examination of photosynthetic activity of PSII and PSI indicated that CitERF13 overexpression led to declines of F-v/F-m, Y(II) and Y(I). However, change in NPQ was less pronounced. CitERF13 overexpression also significantly reduced V-c,V-max, J(max) and AQY, indicating inhibition of the Calvin cycle. The expression of photosynthesis-related genes was suppressed to a variable extent in leaf blades transiently over-expressing CitERF13. CitERF13 transient overexpression in tobacco or citrus both resulted in a decline of Chlorophyll content and CitERF13 overexpressing tobacco leaf disc was more susceptible to chlorosis in response to MV-mediated oxidative stress. The results suggest that CitERF13 is potentially involved in suppressing photosynthesis through multiple pathways, for instance, inhibiting photochemical activity of photosynthesis, CO2 carboxylation capacity and chlorophyll metabolism. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
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