›› 2020, Vol. 32 ›› Issue (9): 1645-1655.DOI: 10.3969/j.issn.1004-1524.2020.09.13

• Horticultural Science • Previous Articles     Next Articles

Transcriptome analysis on development of aerial root in grape of Weike

GE Jintao, WANG Jiangying, ZHAO Wenjing, SHAO Xiaobin, ZHU Pengbo, TANG Xueyan, SUN Mingwei, LIU Xingman*   

  1. Lianyungang Academy of Agricultural Sciences, Lianyungang 222000, China
  • Received:2020-03-13 Online:2020-09-25 Published:2020-10-10

Abstract: Aerial root is a special type of root in grape which grows under high temperature and high humidity. The aerial root has low developmental degree and high potential for differentiation. In this study, techniques were used to induce aerial germination and rooting at the stem nodes of the fruiting branch of Weike grape, and the expression of root transcription genes was analyzed with the untreated stem nodes of the same mother branch as the control. The results showed that the expression of 3 989 genes was increased and the expression of 2 830 genes was down-regulated during the induction of aerial roots. GO functional classification was used to classify annotated genes into 40 functional categories, including catalytic activity, binding, and metabolic processes. Parts of the root key gene expression results showed that all plant hormones including auxin, gibberellin and abscisic acid were involved in the regulation process. Combined with corresponding gene analysis of auxin downstream, endoglucanase, PRE gene and high-affinity nitrate transporter gene significantly up-regulated in the aerial root development, indicating that the degradation of epidermal cell wall at stem nodes and the enrichment of nitrate at stem nodes to stimulate root germination were important regulatory mechanisms for the growth and development of aerial roots.

Key words: grape, aerial root, root system, transcriptome sequencing, auxin

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