Cloning and identification of GhDUF231L1 gene related with cotton fiber development

Abstract

The invention discloses a full-length sequence of a new cotton fiber specific expression gene GhDUF231L1, of which a function relates to formation and modification of cotton fiber secondary wall materials. The GhDUF231L1 gene comprises five exons and four introns as well as a 1.6kb promoter fragment and an encoded 430 amino acid. The gene is a cotton fiber secondary wall development specific gene, of which the expression quantity is rapidly increased in fibers after flowering for 15 days and the expression quantity reaches a peak value after the flowering for 20 days. The GhDUF231L1 promoter mainly expresses in a vascular system of leaf veins and stems of transgenic arabidopsis thaliana leaves and also expresses in roots, flowers and legumes; a promoter area contains a cis-acting element which can be bonded with upstream transcription factors. Transgenic plants are enlarged, the cellulose content is increased and the contents of cell wall monosaccharide compositions are changed because GhDUF231L1 is over-expressed in arabidopsis thaliana. The results prove that GhDUF231L1 participates in plant growth, in particular to the biological synthesis of secondary cell walls, so that GhDUF231L1 possibly plays a key role in cotton fiber development.

Description

Technical field: [0001] The present invention relates to cotton genes. Specifically, the cloning and functional identification of a DUF231 family gene GhDUF231L1 and its promoter specifically expressed in cotton fibers. Background technique: [0002] Cotton fiber is one of the natural resources with the highest known cellulose purity and occupies an important position in the world textile industry. Although the appearance of synthetic fibers has greatly reduced the market share of cotton fibers, cotton fibers cannot be replaced because of their good air permeability, warmth retention, moisture absorption, and comfortable wearing. With the introduction of high-efficiency and rapid spinning technology, the enhancement of people's awareness of health care and the improvement of living standards, the requirements for cotton fiber quality are becoming more and more urgent. Fiber strength is an important indicator of raw cotton quality. The thickening period of the secondary wal...

AI Technical Summary

Problems solved by technology

The above studies show that the known members of the DUF231 family in Arabidopsis are all involved in the synthesis and modification of secondary wall substances, and the functions of a large number of members of this family have yet to be explored.

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