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Ectopic expression of a cyanobacterial flavodoxin in creeping bentgrass impacts plant development and confers broad abiotic stress tolerance

文献类型: 外文期刊

作者: Li, Zhigang 2 ; Yuan, Shuangrong 2 ; Jia, Haiyan 2 ; Gao, Fangyuan 2 ; Zhou, Man 2 ; Yuan, Ning 2 ; Wu, Peipei 2 ; Hu, Qi 1 ;

作者机构: 1.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan, Hubei, Peoples R China

2.Clemson Univ, Dept Biochem & Genet, Clemson, SC 29634 USA

3.Nanjing Agr Univ, Appl Plant Genom Lab, Crop Genom & Bioinformat Ctr, Nanjing, Jiangsu, Peoples R China

4.Nanjing Agr Univ, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing, Jiangsu, Peoples R China

5.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu, Sichuan, Peoples R China

关键词: cyanobacterial flavodoxin;abiotic stress tolerance;drought tolerance;heat tolerance;methyl viologen resistance;nitrogen starvation;turfgrass;transgenics

期刊名称:PLANT BIOTECHNOLOGY JOURNAL ( 影响因子:9.803; 五年影响因子:9.555 )

ISSN: 1467-7644

年卷期: 2017 年 15 卷 4 期

页码:

收录情况: SCI

摘要: Flavodoxin (Fld) plays a pivotal role in photosynthetic microorganisms as an alternative electron carrier flavoprotein under adverse environmental conditions. Cyanobacterial Fld has been demonstrated to be able to substitute ferredoxin of higher plants in most electron transfer processes under stressful conditions. We have explored the potential of Fld for use in improving plant stress response in creeping bentgrass (Agrostis stolonifera L.). Overexpression of Fld altered plant growth and development. Most significantly, transgenic plants exhibited drastically enhanced performance under oxidative, drought and heat stress as well as nitrogen (N) starvation, which was associated with higher water retention and cell membrane integrity than wild-type controls, modified expression of heat-shock protein genes, production of more reduced thioredoxin, elevated N accumulation and total chlorophyll content as well as upregulated expression of nitrite reductase and N transporter genes. Further analysis revealed that the expression of other stress-related genes was also impacted in Fld-expressing transgenics. Our data establish a key role of Fld in modulating plant growth and development and plant response to multiple sources of adverse environmental conditions in crop species. This demonstrates the feasibility of manipulating Fld in crop species for genetic engineering of plant stress tolerance.

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