Protein capable of improving salt tolerance and drought tolerance of plants as well as coding gene and application of protein

Abstract

The invention discloses a protein capable of improving salt tolerance and drought tolerance of plants as well as a coding gene and application of the protein. The protein has a sequence represented by SEQ ID NO.1 and is named as MePMP3-2. The coding gene of the protein has a sequence represented by SEQ ID NO.2 and is named as gene MePMP3-2. The protein coded by the gene MePMP3-2 is positioned in cell membranes of plants, and the coding gene MePMP3-2 of the protein is introduced into the plants, so that the germination rate of seeds of the transgenic plants under the treatment of ABA, NaCl and mannitol is increased, the root lengths and the seedling lengths of the transgenic plants under high-salinity and high-mannitol under adversities are increased, and the transgenic plants are relatively high in survival rate, relatively low in malondialdehyde (MDA) content and relatively high in proline (Pro) content under the stress of drought and high salinity; the relative expression quantities of adversity relevant genes including OsProT, OsP5CS, OsDREB2A, OsLEA3 and the like in the transgenic plants are increased at different degrees under adversity stress.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a protein for improving salt and drought tolerance of plants, its coding gene and application. Background technique [0002] Abiotic stresses, such as high temperature, drought, high salinity, alkaline soil, heavy metals, and peroxidation stress, all seriously threaten agricultural production and are the main cause of crop yield reduction worldwide. The growth and development of plants, as well as the yield, quality and later growth of crops are all affected by abiotic stresses, and 60% of the production reduction of major crops worldwide is caused by abiotic stresses. In order to ensure the sustained and stable high yield of crops, humans urgently need to breed new crop varieties with higher tolerance to abiotic stresses such as drought, high salinity, and peroxidation. However, the progress of improving the traits and stress resistance of crops through traditional breeding methods...

AI Technical Summary

Problems solved by technology

Although it is generally believed that the PMP3 gene is indirectly involved in the regulation of ion uptake by cells, its exact mechanism remains to be elucidated.

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