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Rice OsSDY1 gene, biological material, method, expression vector transformation host and application of rice OsSDY1 gene in stress resistance and yield stabilization

A biomaterial and rice technology, applied in the field of plant genetic engineering, can solve the problems of reducing yield, restricting plant growth and development, and changing water efficiency of stomatal plants to stress and resistance.

Active Publication Date: 2020-11-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traits affecting stomata often lead to changes in plant water-use efficiency and stress resistance
Drought and water shortage are the biggest limiting factors in food production. Reducing the opening and density of stomata can achieve the purpose of water saving and drought resistance. Reducing water loss by closing stomata depends on adversity signals such as plant hormone ABA and ethylene, ABA and its metabolites tends to limit plant growth and development resulting in reduced yield

Method used

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  • Rice OsSDY1 gene, biological material, method, expression vector transformation host and application of rice OsSDY1 gene in stress resistance and yield stabilization
  • Rice OsSDY1 gene, biological material, method, expression vector transformation host and application of rice OsSDY1 gene in stress resistance and yield stabilization
  • Rice OsSDY1 gene, biological material, method, expression vector transformation host and application of rice OsSDY1 gene in stress resistance and yield stabilization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Cloning of rice OsSDY1 gene

[0031] 1. Obtaining the genome sequence of the rice OsSDY1 gene

[0032] The leaf DNA of the rice variety Zhonghua 11 (ZH11) was extracted, and the DNA was used as a template to use the forward primer OsSDY1-F (sequence shown in SEQ ID NO. 5) and reverse primer OsSDY1-R (sequence shown in SEQ ID NO. 6), PCR amplification was performed with KOD PlusNeo (Code: KOD-401, TOYOBO) to obtain the amplification product, that is, SEQ ID NO. 1 in the sequence table, OsSDY1 gene sequence.

[0033] 2. Obtaining the coding sequence of rice OsSDY1 gene

[0034] Extraction of total RNA from leaves of rice cultivar ZH11 using PrimeScript TM RT reagent Kit with gDNAEraser (Perfect Real Time) (Code: RR047A, Takara) to synthesize cDNA, use this cDNA as a template, use forward primer OsSDY1-CDS-F (sequence shown in SEQ ID NO.7) and reverse primer OsSDY1-CDS-R (the sequence is shown in SEQ ID NO. 8) was amplified by PCR with KOD-Plus-Neo (Code: KOD-...

Embodiment 2

[0035] Example 2 Identification of rice CRISPR-Cas9 gene editing lines

[0036]Plants to be tested: recipient variety ZH11 and gene-edited OsSDY1 gene mutants.

[0037] Extract the leaf genomic DNA of the plant to be tested, take this DNA as a template, and use primers: OsSDY1-CPR-F (sequence as shown in SEQ ID NO.9) and OsSDY1-CPR-R (sequence as shown in SEQ ID NO.10) ) for PCR amplification, and the genomic DNA of the recipient variety ZH11 was used as a negative control.

[0038] The PCR amplification product was subjected to 1% agarose gel electrophoresis, the positive control showed a band of about 459 bp, and the negative control had no band. Sequence the lines with positive bands to analyze whether there are indels or substitutions at the editing site. Part of the sequencing results are as follows: figure 2 . The positive line was selected as Ossdy1-1.

Embodiment 3

[0039] Example 3 Identification of stomatal developmental phenotypes of transgenic lines

[0040] Plant to be tested: ZH11, a positive homozygous gene-edited plant Ossdy1-1.

[0041] 1. Each plant to be tested was cultivated in an incubator for about 25 days and then moved to a greenhouse for soil cultivation, with 4 plants per pot and 3 pots per line.

[0042] 2. After the rice plant is completely heading in step 1, cut the blade segment of about 4cm long at the wider middle of the flag leaf of the main panicle, and quickly put it into the standard fixative solution FAA (70% alcohol solution: formalin: glacial acetic acid) = 18: 1: 1) in the plastic bottle, the amount of fixative is about 30 times that of the leaves, to ensure that there is a certain gap between the leaves, and keep them airtight for more than 18 hours.

[0043] 3. Take out the fixed leaves in step 2, rinse with 70% alcohol for about 5 minutes, remove the fixative in the tissue, put it into a plastic bottle ...

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Abstract

The invention discloses a rice OsSDY1 gene, a biological material, a method, an expression vector transformation host and an application of the rice OsSDY1 gene in stress resistance and yield stabilization. The invention particularly relates to an application of the OsSDY1 gene in stress resistance and yield stabilization of rice. The gene OsSDY1 related to control of stress resistance and yield stabilization of the rice is obtained by cloning through methods of candidate gene screening and the like, the nucleotide sequence of the gene is shown as SEQ ID NO.2, and the protein sequence coded bythe gene is shown as SEQ ID NO.3. Through phenotypic identification of transgenic rice materials in a booting stage and a mature stage, results show that the OsSDY1 gene is knocked out or mutated tocause phenotypes of stomatal conductance reduction, photosynthetic rate reduction, plant height reduction, yield reduction and the like of the transgenic rice. The invention confirms the biological function of the OsSDY1 gene and the way and the method for applying the OsSDY1 gene.

Description

technical field [0001] The invention belongs to the technical field of plant genetic engineering, and in particular relates to a rice OsSDY1 gene, a biological material, a method, an expression vector transformation host and its application in stress resistance and stable yield. Background technique [0002] With the increase of population and the development of social economy, my country's food demand is increasing rigidly. It is particularly necessary to actively develop and utilize the drought-resistance and water-saving mechanism encoded in the plant genome to improve the drought-resistance, stress-resistance and stable yield of crops. Plant height and yield are important agronomic traits of crops, especially rice. Stomata play a crucial role in photosynthesis as the basic physiological process of crop yield formation and crop stress resistance and stability. Stomata are the main gateways for gas exchange between plants and the external environment, and are responsible...

Claims

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Application Information

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IPC IPC(8): C12N15/29C12N15/82A01H5/00A01H6/46
CPCC07K14/415C12N15/8261C12N15/8271
Inventor 梁允宽弓路平
Owner WUHAN UNIV
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