Molecular Cloning and Characterization of GhERF105, a Gene Contributing to the Regulation of Gland Formation in Upland Cotton (Gossypium Hirsutum L.)

Overview

Journal BMC Plant Biol

Publisher Biomed Central

Specialty Biology

Date 2021 Feb 19

PMID 33602142

Citations 7

Authors

Chaofeng Wu

Hailiang Cheng

Shuyan Li

Dongyun Zuo

Zhongxu Lin

Youping Zhang

Limin Lv

Qiaolian Wang

Guoli Song

Affiliations

Soon will be listed here.

Abstract

Background: Gossypium hirsutum L. (cotton) is one of the most economically important crops in the world due to its significant source of fiber, feed, foodstuff, oil and biofuel products. However, the utilization of cottonseed was limited due to the presence of small and darkly pigmented glands that contain large amounts of gossypol, which is toxic to human beings and non-ruminant animals. To date, some progress has been made in the pigment gland formation, but the underlying molecular mechanism of its formation was still unclear.

Results: In this study, we identified an AP2/ERF transcription factor named GhERF105 (GH_A12G2166), which was involved in the regulation of gland pigmentation by the comparative transcriptome analysis of the leaf of glanded and glandless plants. It encoded an ERF protein containing a converved AP2 domain which was localized in the nucleus with transcriptional activity, and showed the high expression in glanded cotton accessions that contained much gossypol. Virus-induced gene silencing (VIGS) against GhERF105 caused the dramatic reduction in the number of glands and significantly lowered levels of gossypol in cotton leaves. GhERF105 showed the patterns of spatiotemporal and inducible expression in the glanded plants.

Conclusions: These results suggest that GhERF105 contributes to the pigment gland formation and gossypol biosynthesis in partial organs of glanded plant. It also provides a potential molecular basis to generate 'glandless-seed' and 'glanded-plant' cotton cultivar.

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