Transcriptome analysis suggests mechanisms for a novel flowering type: Cleistogamous wheat
文献类型： 外文期刊
作者： Tang, Caiguo 1 ; Li, Minghao 1 ; Cao, Minghui 1 ; Lu, Ruiju 3 ; Zhang, Huilan 1 ; Liu, Chenghong 3 ; Huang, Shengwei 1 ;
作者机构： 1.Chinese Acad Sci, Hefei Inst Phys Sci, Key Lab High Magnet Field & Ion Beam Phys Biol, Hefei 230031, Anhui, Peoples R China
2.Univ Sci & Technol China, Sch Life Sci, Hefei 230027, Anhui, Peoples R China
3.Shanghai Acad Agr Sci, Biotech Res Inst, Shanghai 201106, Peoples R China
4.Anhui Univ, Sch Life Sci, Hefei 230601, Anhui, Peoples R China
5.Chinese Acad Sci, Hefei Inst Phys Sci, Taihe Expt Stn, Taihe 236626, Anhui, Peoples R China
期刊名称：CROP JOURNAL （ 影响因子：4.407； 五年影响因子：5.687 ）
ISSN： 2095-5421
年卷期： 2020 年 8 卷 2 期
页码：
收录情况： SCI
摘要： Wheat is one of the most important staple crops worldwide. Fusarium head blight severely reduces wheat yield and quality. Cultivation of a novel type of cleistogamous wheat mutant, ZK001, which was created by static magnetic field treatment, is a new strategy for controlling Fusarium head blight. However, little is known about the mechanism of cleistogamy in wheat. The present study demonstrated that anthers of ZK001 were retained on the glumes at all flowering stages, whereas those of YM18 were extruded from the paleae and lemmae. There was a clear difference in the morphological characteristics of lodicules between YM18 and ZK001. Lodicule calcium and potassium contents were significantly higher in YM18 than in ZK001 from white to yellow anther stages. In Fusarium head blight resistance, the diseased kernel rate and deoxynivalenol content of ZK001 were markedly lower than those of YM18 and QM725. Comparative transcriptome analysis of YM18 and ZK001 was performed to identify regulatory mechanisms of cleistogamy. The main differentially expressed genes identified in the spikelets of YM18 and ZK001 at the green anther stage were associated with cell walls, carbohydrates, phytohormones, water channel, and ion binding, transport, and homeostasis. These differentially expressed genes may play an important role in regulating cellular homeostasis, osmotic pressure, and lodicule development. The results indicate that ZK001 lost the ability to push the lemmae and paleae apart during the flowering stage because of the thin lodicules. ZK001 was speculated to provide structural barriers for Fusarium head blight during the flowering stage. The thin lodicule of ZK001 results from low levels of soluble sugar, calcium ions, and potassium ions in the lodicules. These levels are regulated by differentially expressed genes. (c) 2020 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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