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通过混合树的生长重编程形成柔性木材,涉及斯蒙酸盐和聚氨酸以及类似于张力木材发展的转录性变化

János Urbancsok¹, Evgeniy N Donev¹, Pramod Sivan¹

¹Umeå Plant Science Centre (UPSC), Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 90183, Umeå, Sweden.

The New phytologist

|October 19, 2023

概括

在混合树中低强度的茎曲刺激了生长,改变了木材的特性,增强了其生物炼油厂的潜力. 这种机械刺激激活了分子和激素通路,类似于tighmomorphogenesis和张力木材形成.

科学领域:

植物生物学植物生物学
木材科学木材科学木材科学
生物技术是生物技术.

背景情况:

树木的茎曲,称为tighmomorphogenesis,诱导木材形成的变化,但潜在的机制和由此产生的木材特性尚未完全理解.
柔性木材是对机械应力的一种反应,其发展和属性改变的特征很差.

研究的目的:

研究低强度多方向茎曲对混合青的生长,木材特性和分子/激素反应的影响.
阐明涉及tighmomorphogenesis的途径及其与其他木材形成程序的重叠.

主要方法:

杂交树幼苗每天在五周内受到干部震动.
分析包括转录学,在木和木材组织中的激素分析,以及木材特性的物理,化学和微观表征.

主要成果:

茎曲显著增加了初级和二级生长.
木材的分化发生了变化,其特点是凝状纤维的形成,减少了二次壁的厚度,修改了多糖体,并增加了纤维素,木质素,细胞壁的多孔性和糖化产量.
形成木材的组织显示了荷尔蒙水平的变化 (高的斯蒙酸盐,聚氨酸,乙烯,黄类固醇;降低了酸,吉伯雷林) 和转录反应类似于张力木材的形成.

结论:

低强度的茎曲刺激了生长,并诱导了具有增强生物炼油性能的木材.
激活的分子和激素途径类似于草本植物中的tighmomorphogenesis,并且在很大程度上与硬木中的张力木材程序重叠.

关键词:

人群震 × 震物曲折木材曲折木材曲折木材斯酸信号传递器机械刺激机械刺激聚氨酸是多氨基的糖化 (saccharification) 是一个过程.这就是tighmomorphogenesis.发展木材发展木材

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