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Citation:

Tissue Expression Pattern Analysis of TIPs Genes in Phyllostachys edulis

  • Received Date: 2015-08-04
  • [Objective] To reveal the role of tonoplast intrinsic proteins (TIPs) in bamboo under stress conditions and provide new genetic resource for the breeding of new varieties. [Method] The molecular characteristics and expression profiles of TIPs in moso bamboo (Phyllostachys edulis (Carr.) H. de Lehaie) were conducted. The gene expression in different tissues and those under drought, water and NaCl abiotic stresses were analyzed with real-time quantitative PCR. [Result] The result indicated that there were six TIPs homologous genes belonged to three subgroups (TIP1, TIP2 and TIP4) in moso bamboo genome, among which four genes (PeTIP1;1, PeTIP1;2, PeTIP2;2 and PeTIP4;2) consisted of two exons and one intron, and the other two genes (PeTIP2;1 and PeTIP4;1) consisted of three exons and two introns, respectively. Protein structure analysis indicated that all the six PeTIPs had two typical NPA domains and four conserved ar/R selectivity filter. Tissue specific analysis based on transcriptome demonstrated that PeTIP1;1 expressed with high levels in all tissues, PeTIP1;2 had the highest expression level in flower, PeTIP2;1 was mainly expressed in root and rhizome, PeTIP2;2 was specifically expressed in roots, PeTIP4;1 had the highest expression level in leaf, and PeTIP4;2 expressed in shoot and rhizome with high level, but the lowest in the roots. The result of qRT-PCR confirmed that in roots PeTIP4;1 was up-regulated, while PeTIP2;1, PeTIP2;2 and PeTIP4;2 were inhibited significantly (pPeTIP1;1 and PeTIP4;1 increased and those of PeTIP1;2, PeTIP2;2, and PeTIP4;2 decreased significantly (pPeTIPs all raised significantly (pPeTIP1;1, PeTIP1;2 and PeTIP4;1 were up-regulated under drought treatment, all the expression levels of six PeTIPs were significantly increased under water stress (pPeTIP2;1 was suppressed significantly (p[Conclusion] This result indicated that PeTIPs may play roles with varying degrees in bamboo tolerance of drought, water, NaCl and other abiotic stresses.
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Tissue Expression Pattern Analysis of TIPs Genes in Phyllostachys edulis

  • 1. International Center for Bamboo and Rattan, State Forestry Administration Key Laboratory on the Science and Technology of Bamboo and Rattan, Beijing 100102, China

Abstract: [Objective] To reveal the role of tonoplast intrinsic proteins (TIPs) in bamboo under stress conditions and provide new genetic resource for the breeding of new varieties. [Method] The molecular characteristics and expression profiles of TIPs in moso bamboo (Phyllostachys edulis (Carr.) H. de Lehaie) were conducted. The gene expression in different tissues and those under drought, water and NaCl abiotic stresses were analyzed with real-time quantitative PCR. [Result] The result indicated that there were six TIPs homologous genes belonged to three subgroups (TIP1, TIP2 and TIP4) in moso bamboo genome, among which four genes (PeTIP1;1, PeTIP1;2, PeTIP2;2 and PeTIP4;2) consisted of two exons and one intron, and the other two genes (PeTIP2;1 and PeTIP4;1) consisted of three exons and two introns, respectively. Protein structure analysis indicated that all the six PeTIPs had two typical NPA domains and four conserved ar/R selectivity filter. Tissue specific analysis based on transcriptome demonstrated that PeTIP1;1 expressed with high levels in all tissues, PeTIP1;2 had the highest expression level in flower, PeTIP2;1 was mainly expressed in root and rhizome, PeTIP2;2 was specifically expressed in roots, PeTIP4;1 had the highest expression level in leaf, and PeTIP4;2 expressed in shoot and rhizome with high level, but the lowest in the roots. The result of qRT-PCR confirmed that in roots PeTIP4;1 was up-regulated, while PeTIP2;1, PeTIP2;2 and PeTIP4;2 were inhibited significantly (pPeTIP1;1 and PeTIP4;1 increased and those of PeTIP1;2, PeTIP2;2, and PeTIP4;2 decreased significantly (pPeTIPs all raised significantly (pPeTIP1;1, PeTIP1;2 and PeTIP4;1 were up-regulated under drought treatment, all the expression levels of six PeTIPs were significantly increased under water stress (pPeTIP2;1 was suppressed significantly (p[Conclusion] This result indicated that PeTIPs may play roles with varying degrees in bamboo tolerance of drought, water, NaCl and other abiotic stresses.

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