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New CkNHX gene and shearing decorative gene CkNHXn, method for cultivating inverse-resistant plant

A plant and gene technology, applied in the field of the new CkNHX gene and its splicing modification gene CkNHXn, and the cultivation of stress-tolerant plants, can solve the problems that have not been retrieved yet

Active Publication Date: 2007-09-19
INST OF GENETICS & DEVELOPMENTAL BIOLOGY CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gene CkNHX encoding NHX from the shrub plant Caragana has not been retrieved yet

Method used

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  • New CkNHX gene and shearing decorative gene CkNHXn, method for cultivating inverse-resistant plant
  • New CkNHX gene and shearing decorative gene CkNHXn, method for cultivating inverse-resistant plant
  • New CkNHX gene and shearing decorative gene CkNHXn, method for cultivating inverse-resistant plant

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1, the cloning of Caragana CkNHX gene

[0035] Caragana seedlings grown for 2-3 months (purchased from germinated Caragana seeds in Xinjiang Turpan Desert Botanical Garden, Chinese Academy of Sciences) were used as materials, and induced overnight with 100uM ABA (Sigma Company). Take the leaves, wash them, put them into a DEPC-treated and sterilized homogenizer, add TRIzol (Invitrogen) to grind and homogenate, leave at room temperature for 5 minutes, add chloroform to extract twice, take the supernatant, and use iso Total RNA was precipitated with propanol, air-dried, and dissolved in an appropriate amount of DEPC water. cDNA was obtained by reverse transcription with polyT primers.

[0036] The primer sequence of polyT is as follows:

[0037] Oligo dT-Primer: 5'-CGAGCGGCCGCCCGGGCAGGTTTTTTTTTTTTTTTT-3' (SEQ ID NO: 5)

[0038] The RT reaction conditions are as follows:

[0039] DEPC water 85uL

[0040] RNase inhibitor (40U / uL) 5uL

[0041] Oligo dT-Prime...

Embodiment 2

[0095] Embodiment 2, the construction of CkNHXn gene

[0096]References reported (Yamaguchi T, Apse M P, Shi H Z, and Blumwald E(2003).Topological analysis of a plant vacuolar Na+ / H+antiporter revealsa lumihal C terminus that regulates antiporter cation selectivity.PNAS.100(21):12510- 12515), using the following primers to add a stop codon after the 435th amino acid to form a C-terminal truncated CkNHXn (that is, to remove the peptide after the 435th position) (see Figure 3). The primers used are:

[0097] The forward primer is (including Sac I site)

[0098] 5'-CGCGCC GAGCTC ATGGCTTTTGAAATTGTCT-3' (SEQ ID NO: 18)

[0099] The reverse primer is (including Xba I site)

[0100] 5'-CCGCGC TCTAGA CTAAGTCATCAAAACCAAACACC-3' (SEQ ID NO: 19)

[0101] High-fidelity Pyrobest Taq was used to perform PCR amplification using the above-mentioned reverse transcription product as a template, and the method was the same as before. The CkNHXn gene (SEQ ID NO: 3) with a fragment size o...

Embodiment 3

[0102] Example 3, used for yeast functional complementation experiments

[0103] 1. Construction of yeast expression vector

[0104] According to conventional molecular biology methods (F. Osper et al., translated by Yan Ziying and Wang Hailin, finely edited Molecular Biology Experiment Guide. Science Press, 2001), respectively introduce The Sac I and Xba I sites were double digested with Sac I and Xba I, and then connected into pYES2.0 (Invortrogene) double cut with the same enzyme to construct two yeast expression vectors, pYES-NHX and pYES-NHXn. Its construction maps are shown in Figures 8 and 9. After enzyme digestion, PCR identification and sequencing to ensure that the inserted fragment is correct, it was transferred into the salt-sensitive yeast mutant ANT3 (see references for details: Quintero FJ, Blattb MR, and Pardo JM (2000 ).Functional conservation between yeast and plant endosomal Na + / H + antiporters. FEBS Lett 471, 224-228). For specific operations, refer t...

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Abstract

The invention provides a novel CkNHX genen and excision adorn gene CkNHXn thereof. The gene stems from Caragana korshinskii Kom, its gene codes Na+ / H+ antiporter gene. The cDNA obtained by clone constructs yeast expression carrier and plant expression carrier. The yeast mutant strain vertifies salt resistance thereof by complament experiment. Moreover, a transgenic plant is also obtained. By testing salt resistance of transformed plant, transformation of the gene can make the transgenic plant with salt resistance.

Description

technical field [0001] The present invention relates to a kind of Na + / H + Antiporter CkNHX and modification protein CkNHXn. Specifically, the present invention relates to a kind of NHX class Na derived from desert shrub Caragana korshinskii Kom + / H + Antiporter, named CkNHX, and its modified protein CKNHXn. The present invention also relates to encoding such Na + / H + Antiporter genes, vectors containing the genes, and methods for cultivating salt-tolerant plants using the genes. Background technique [0002] Due to changes in the ecological environment, coupled with drought, less rainfall, and land salinization, it can lead to large-scale salinization of arable land, which seriously affects human survival (Wang W X, Vinocur B, AltmanA (2003). Plant responses to drought, salinity and extreme temperatures: towards genetic engineering for stress tolerance. Planta, 218:1-14). How to improve saline-alkali land, maintain the ecological environment, suppress soil erosio...

Claims

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Application Information

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IPC IPC(8): C12N15/29C07K14/415C12N15/63C12N15/82
Inventor 胡赞民杨大海胡军苏晓华陈宇红尹维波
Owner INST OF GENETICS & DEVELOPMENTAL BIOLOGY CHINESE ACAD OF SCI
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