当前位置: X-MOL 学术New Phytol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
MicroRNA156-mediated changes in leaf composition lead to altered photosynthetic traits during vegetative phase change
New Phytologist ( IF 9.4 ) Pub Date : 2020-10-16 , DOI: 10.1111/nph.17007
Erica H Lawrence 1 , Clint J Springer 2 , Brent R Helliker 1 , R Scott Poethig 1
Affiliation  

  • Plant morphology and physiology change with growth and development. Some of these changes are due to change in plant size and some are the result of genetically programmed developmental transitions. In this study we investigate the role of the developmental transition, vegetative phase change (VPC), on morphological and photosynthetic changes.
  • We used overexpression of microRNA156, the master regulator of VPC, to modulate the timing of VPC in Populus tremula × alba, Zea mays, and Arabidopsis thaliana to determine its role in trait variation independent of changes in size and overall age.
  • Here, we find that juvenile and adult leaves in all three species photosynthesize at different rates and that these differences are due to phase-dependent changes in specific leaf area (SLA) and leaf N but not photosynthetic biochemistry. Further, we found juvenile leaves with high SLA were associated with better photosynthetic performance at low light levels.
  • This study establishes a role for VPC in leaf composition and photosynthetic performance across diverse species and environments. Variation in leaf traits due to VPC are likely to provide distinct benefits under specific environments; as a result, selection on the timing of this transition could be a mechanism for environmental adaptation.


中文翻译:

MicroRNA156 介导的叶片组成变化导致营养相变期间光合特性的改变

  • 植物形态和生理随着生长发育而变化。其中一些变化是由于植物大小的变化,一些是基因程序化发育转变的结果。在这项研究中,我们研究了发育转变、营养阶段变化 (VPC) 对形态和光合变化的作用。
  • 我们使用 VPC 的主要调节因子 microRNA156 的过表达来调节Populus tremula × albaZea mays拟南芥中VPC 的时间,以确定其在独立于大小和总年龄变化的性状变异中的作用。
  • 在这里,我们发现所有三个物种的幼叶和成叶以不同的速率进行光合作用,这些差异是由于特定叶面积 (SLA) 和叶 N 的相位依赖性变化,而不是光合生物化学。此外,我们发现具有高 SLA 的幼叶与低光水平下更好的光合性能相关。
  • 这项研究确定了 VPC 在不同物种和环境中的叶片组成和光合性能中的作用。由于 VPC 导致的叶片性状变化可能会在特定环境下提供明显的好处;因此,选择这种过渡的时间可能是环境适应的一种机制。
更新日期:2020-10-16
down
wechat
bug