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亚麻中查尔酮合酶（CHS）基因的抑制导致细胞壁合成与感知基因、细胞壁化学性质及茎形态参数的变化。

Chalcone Synthase (CHS) Gene Suppression in Flax Leads to Changes in Wall Synthesis and Sensing Genes, Cell Wall Chemistry and Stem Morphology Parameters.

作者信息

Zuk Magdalena, Działo Magdalena, Richter Dorota, Dymińska Lucyna, Matuła Jan, Kotecki Andrzej, Hanuza Jerzy, Szopa Jan

机构信息

Department of Genetic Biochemistry of Plants, Faculty of Biotechnology, Wroclaw University, WroclawPoland; Linum Foundation, WroclawPoland.

Department of Genetic Biochemistry of Plants, Faculty of Biotechnology, Wroclaw University, Wroclaw Poland.

出版信息

Front Plant Sci. 2016 Jun 24;7:894. doi: 10.3389/fpls.2016.00894. eCollection 2016.

DOI:10.3389/fpls.2016.00894
PMID:27446124
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4919909/
Abstract

The chalcone synthase (CHS) gene controls the first step in the flavonoid biosynthesis. In flax, CHS down-regulation resulted in tannin accumulation and reduction in lignin synthesis, but plant growth was not affected. This suggests that lignin content and thus cell wall characteristics might be modulated through CHS activity. This study investigated the possibility that CHS affects cell wall sensing as well as polymer content and arrangement. CHS-suppressed and thus lignin-reduced plants showed significant changes in expression of genes involved in both synthesis of components and cell wall sensing. This was accompanied by increased levels of cellulose and hemicellulose. CHS-reduced flax also showed significant changes in morphology and arrangement of the cell wall. The stem tissue layers were enlarged averagely twofold compared to the control, and the number of fiber cells more than doubled. The stem morphology changes were accompanied by reduction of the crystallinity index of the cell wall. CHS silencing induces a signal transduction cascade that leads to modification of plant metabolism in a wide range and thus cell wall structure.

摘要

查尔酮合酶（CHS）基因控制着类黄酮生物合成的第一步。在亚麻中，CHS下调导致单宁积累和木质素合成减少，但植物生长未受影响。这表明木质素含量以及细胞壁特性可能通过CHS活性进行调节。本研究调查了CHS影响细胞壁感知以及聚合物含量和排列的可能性。CHS抑制从而木质素减少的植物在参与成分合成和细胞壁感知的基因表达上出现了显著变化。这伴随着纤维素和半纤维素水平的增加。CHS减少的亚麻在细胞壁形态和排列上也出现了显著变化。与对照相比，茎组织层平均扩大了两倍，纤维细胞数量增加了一倍多。茎形态的变化伴随着细胞壁结晶度指数的降低。CHS沉默诱导了一个信号转导级联反应，导致植物代谢在广泛范围内发生改变，进而影响细胞壁结构。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/10739ac9f383/fpls-07-00894-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/0de45a5a861a/fpls-07-00894-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/c19f0b110185/fpls-07-00894-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/113a7e993416/fpls-07-00894-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/705951bd1d87/fpls-07-00894-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/10739ac9f383/fpls-07-00894-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/c01c68c9bc75/fpls-07-00894-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/f701edd1f475/fpls-07-00894-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/ed2c7037e728/fpls-07-00894-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/0de45a5a861a/fpls-07-00894-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/c19f0b110185/fpls-07-00894-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/113a7e993416/fpls-07-00894-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/705951bd1d87/fpls-07-00894-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a762/4919909/10739ac9f383/fpls-07-00894-g009.jpg

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