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Transcriptional reference map of hormone responses in wheat spikes

点击数:发布时间:2019-05-21 11:15:08 来源:

https://link.springer.com/article/10.1186/s12864-019-5726-x?tdsourcetag=s_pctim_aiomsg


Peng-Fei Qi,Yun-Feng Jiang,Zhen-Ru Guo,Qing Chen,Thérèse Ouellet,Lu-Juan Zong,Zhen-Zhen Wei,Yan Wang,Ya-Zhou Zhang,Bin-Jie Xu,Li Kong,Mei Deng,Ji-Rui Wang,Guo-Yue Chen,Qian-Tao Jiang,Xiu-Jin Lan,Wei Li,Yu-Ming Wei,You-Liang Zheng

Abstract

Background

Phytohormones are key regulators of plant growth, development, and signalling networks involved in responses to diverse biotic and abiotic stresses. Transcriptional reference maps of hormone responses have been reported for several model plant species such as Arabidopsis thaliana, Oryza sativa, and Brachypodium distachyon. However, because of species differences and the complexity of the wheat genome, these transcriptome data are not appropriate reference material for wheat studies.

Results

We comprehensively analysed the transcriptomic responses in wheat spikes to seven phytohormones, including indole acetic acid (IAA), gibberellic acid (GA), abscisic acid (ABA), ethylene (ET), cytokinin (CK), salicylic acid (SA), and methyl jasmonic acid (MeJA). A total of 3386 genes were differentially expressed at 24 h after the hormone treatments. Furthermore, 22.7% of these genes exhibited overlapping transcriptional responses for at least two hormones, implying there is crosstalk among phytohormones. We subsequently identified genes with expression levels that were significantly and differentially induced by a specific phytohormone (i.e., hormone-specific responses). The data for these hormone-responsive genes were then compared with the transcriptome data for wheat spikes exposed to biotic (Fusarium head blight) and abiotic (water deficit) stresses.

Conclusion

Our data were used to develop a transcriptional reference map of hormone responses in wheat spikes.

Phytohormone Transcriptome Resistance Fusarium head blight Water deficit Marker gene Defence mechanism