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Yiqiang HAN,Yamei GAO,Ying Shi,Jidao Du,Dianfeng Zheng,Guifeng Liu 한국식물학회 2017 Journal of Plant Biology Vol.60 No.4
Uniconazole, a plant growth retardant, possessesthe ability to improve quality and increase tolerance of plant. However, it is known little about the effects of uniconazoleon root. In this study, uniconazole treatments that were appliedthrough seed soaking, promoted soybean root development,and the microstructure of root showed increase of corticalthickness and cortex cell width. Meanwhile, the endogenoushormone content also altered in root after uniconazoletreatments. To obtain the molecular mechanism underlyingthe effects of uniconazole on root, we performed an RNAseqof roots harvested 3 days after uniconazole treatment. Through analyses of phytohormone-associated genes forendogenous hormones changes, we found that not only GAbiosynthesis pathway but also the regulation genes of thepathway were affected. Above all, the dominant pathwayplant hormone signal transduction may be the main factor ofthe cambium proliferation, in especial ethylene/ERF signalingpathway. Moreover, the transcriptome demonstrated differentiallyexpressed genes that determined cell division and cell wallmodification may be regulators of root growth. CLE signalingand receptor-like kinases may play a crucial role in the rootelongation. Besides, 177 transcription factors (TFs) wereinvolved in response to uniconazole. Taken together, allthese findings provide insights into the complex molecularmechanisms associated with root development after uniconazoletreatment.
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