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Medicago truncatula leaf development regulatory gene STF, encoding protein and application of encoding protein

A technology for regulating protein and alfalfa, applied in application, genetic engineering, plant genetic improvement, etc., can solve problems such as limited understanding of molecular regulation mechanism, and achieve the effect of improving photosynthetic efficiency and lodging resistance

Active Publication Date: 2016-05-11
THE INST OF BIOTECHNOLOGY OF THE CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the understanding of the molecular regulation mechanism of ideal plant architecture and yield formation in rice is still very limited

Method used

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  • Medicago truncatula leaf development regulatory gene STF, encoding protein and application of encoding protein
  • Medicago truncatula leaf development regulatory gene STF, encoding protein and application of encoding protein
  • Medicago truncatula leaf development regulatory gene STF, encoding protein and application of encoding protein

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The isolation clone of embodiment 1STF gene

[0025] The position of the CDS sequence of Medicago truncatula STF on the genome is Medtr8g107210, and PCR amplification primers were designed, forward primer F: 5'-ATGTGGATGGTGGGTTACAAT-3'; reverse primer R: 5'-TCAGTTTTTCAAGGGAAGAAACT-3'. Collect various tissue parts of Medicago truncatula at different growth stages, extract the total RNA of these materials by TRizol method (refer to invitrogentrizol), refer to invitrogenssRT-Ⅲ to reverse-transcribe the mRNA into cDNA, and use Medicago truncatula cDNA as a template to perform PCR to obtain the full sequence of STF. The reaction system is as follows:

[0026] The total PCR reaction system is 50 μL, including 1 μL of Medicago truncatula cDNA (50ng); 2.5 μL of dNTP (2.5 mM); 1 μL of primer F (10 μM); 1 μL of primer R (10 μM); Q5 (NEB) enzyme (5U / μL) 0.3 μL ; 10 μL of 5× buffer; ddH 2 O34 μL, a total of 50 μL. The PCR reaction program was: pre-denaturation at 94°C for 5min...

Embodiment 2

[0028] The acquisition of embodiment 2 transgenic rice of STF

[0029] According to the sequence information of STF, PCR amplification primers were designed at both ends of its CDS. Forward primer F: 5'-ggggacaagtttgtacaaaaaagcaggcttcATGTGGATGGTGGGTTACAAT-3'; reverse primer R: 5'-ggggacactttgtacaagaaagctgggtcctaTCAGTTTTTCAAGGGAAGAAACT-3'. Using the nucleotide sequence obtained in Example 1 as a template, PCR was performed to obtain the full sequence of STF (as shown in SEQ ID NO.2 in the sequence table).

[0030] The PCR product was ligated to the pDONR207 intermediate vector containing the Gateway linker by BP reaction, and the sequence identical to the target STF was identified by sequencing. Then STF-pDONR207 was recombined into the modified overexpression vector pMDC32-pUbi by LR reaction (the 35S promoter on the pMDC32 vector was replaced with the maize Ubiquitin promoter by enzyme digestion), and the vector Ubi::STF was obtained. The overexpression vector Ubi::STF was...

Embodiment 3

[0032] Example 3 STF gene functional analysis

[0033]According to the 30 STF rice transgenic plants obtained by the method of Example 2, these materials were planted into the field, and were divided into three categories according to the level of expression, and 3 representative transgenic plants were selected, and the leaves were treated at the seedling stage and mature heading stage respectively. Statistical analysis of panicle type and panicle type showed that the transgenic plants with moderate expression showed a phenotype of widened leaves, while the leaves of transgenic plants with excessive expression were severely curled (see attached figure 2 ). It was suggested that STF plays an important role in the process of altering rice leaf development. Select the control material and the STF overexpression transgenic material flag leaves at the booting stage, and use the photosynthetic efficiency meter LI6400xt to detect the photosynthetic efficiency of the control mater...

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Abstract

The invention discloses a medicago truncatula leaf development regulatory gene STF, and encoding protein of the gene. The medicago truncatula leaf development regulatory gene has a nucleotide sequence shown as SEQ ID No.2 and an amino acid sequence shown as SEQ ID No.1. An overexpression medicago truncatula leaf development regulatory gene STF can obviously improve two important agronomic characters, namely leaves and stems, of monocotyledon crops (rice), STF gene overexpression rice material leaves are widened and thickened, the stems are thick, the photosynthetic efficiency and lodging-resistant capacity of the rice are remarkably improved, and the problems that the photosynthetic efficiency is low, the stems are weak, lodging easily occurs and the like of the monocotyledon crops such as the rice in agricultural production can be solved.

Description

technical field [0001] The invention relates to a leaf development regulating gene, in particular to a leaf development regulating gene STF of Medicago truncatula and application thereof. Background technique [0002] With the rapid growth of population, the area of ​​arable land is gradually decreasing, and the global food security problem is becoming more and more serious. Rice is an important food crop, providing a source of food and nutrition for more than half of the world's population. Increasing rice production is considered to be the most important link to alleviate the food crisis. The improvement of rice plant architecture plays an important role in increasing rice yield. Since Donald in Australia proposed the concept of ideal plant type in 1968, rice breeders at home and abroad have carried out systematic research on the topic of ideal plant type. Ideal plant type is a core field in the current super rice research at home and abroad, that is, by changing the st...

Claims

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Application Information

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IPC IPC(8): C07K14/415C12N15/29C12N15/82A01H5/00
Inventor 林浩牛丽芳王慧刘斌孟颖颖
Owner THE INST OF BIOTECHNOLOGY OF THE CHINESE ACAD OF AGRI SCI
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