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修改二次壁中的西兰会改变细胞壁生物合成和木材形成程序,并改善糖化

Pramod Sivan^1,2, János Urbancsok¹, Evgeniy N Donev¹

¹Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden.

Plant biotechnology journal

|October 22, 2024

概括

在树中对木质葡萄糖烯 (GX) 的基因改造减少了生物质的回收性,用于生物炼油厂. 这种修改改善了葡萄糖产量,但影响了树木的生长,为未来的遗传改进提供了目标.

科学领域:

植物生物技术植物生物技术
生物质科学是生物质科学.
森林遗传学森林遗传学

背景情况:

宽叶树木中的木材再生阻碍了高效的生物提炼.
葡萄糖氧烯 (GX) 是一个关键的成分,有助于木材的回性.
生物质的遗传改进需要采取减少木材回的策略.

研究的目的:

在杂交树中通过表达内氧基酶来基因修改木质葡萄糖烯 (GX).
调查GX修改对木材特性,回收性和树木生理学的影响.
为了确定参与生长调节和二级壁生物合成的分子通路,以应对改变的西兰.

主要方法:

阿斯珀吉卢斯尼杜兰斯GH10和GH11内氧酶在杂交青中的表达,向细胞壁.
分析树木生长,变形活动,二次壁沉积和树木组织结构.
对西兰分子量和侧链间距的生物化学分析.
酶式糖化试验以确定葡萄糖产量.
多种omics分析 (转录组学,激素组学,代谢组学) 以阐明调节途径.

主要成果:

转基因树表现出树木高度的降低,变化的变形活动,并减少了二级壁沉积.
克西兰的修改导致分子量减少,并减少了侧链间距.
转基因树产生了带有薄的二次壁和变形的血管的低线性树木.
在没有预处理的情况下,酶糖化产量 (葡萄糖) 几乎翻了一番,这表明回收性显著减少.
多omics数据显示了细胞因素和乙烯信号的激活,ABA的减少,以及化和二级壁生物合成途径的抑制.

结论:

在树中修改木质葡萄糖素有效地减少了生物质的回性,并提高了糖化效率.
克西兰修饰触发了内部信号通路,调节了树木生长和二级壁生物合成.
观察到的负增长效应与西兰完整性的感知有关,这表明可能的目标是将增长处罚与恢复性减少脱.

关键词:

葡萄糖氧氨基氨基.菌类的西兰酶.纤维素酸盐是什么纤维素酸盐是什么二次细胞壁中的二次细胞壁.转基因阿斯是一种转基因阿斯.发展木材发展木材

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