The effect of canopy architecture on the patterning of "windflecks" within a wheat canopy
The effect of canopy architecture on the patterning of "windflecks" within a wheat canopy
复制标题
DOI：
10.1111/pce.14168
复制
发表时间：
2021-08-30
影响因子：
7.3
通讯作者：
Murchie, Erik H.
中科院分区：
文献类型：
--
作者：
Burgess, Alexandra J.;Durand, Maxime;Murchie, Erik H.
在田间条件下，植物会受到风引起的运动，这会产生到达叶片的光强度和光谱质量的波动，这里定义为风激。在这项研究中，在两个对比鲜明的小麦（小麦）冠层在充分的阳光条件下的辐照度进行了测量，使用分光辐射计，以确定频率，持续时间和幅度的低到高的光事件加上在风引起的运动的光谱组成。同样，一个静态的树冠建模，使用三维重建和射线追踪，以确定斑点的特点，没有风的存在。相应的建筑性状进行了测量手动和计算机，包括株高，叶面积和角度加上生物力学性能。在风斑期间，光强度可以相差高达40%，变化发生在亚秒级，而在不受风影响的树冠中，变化发生在5分钟内。与Paragon相比，CMH79A冠层的高度较短，叶高更直立，结构开放，导致光波动频率增加，时间间隔缩短。这一发现说明了潜在的建筑性状被选择，以改善冠层光环境，并提供了基础，以进一步探索植物形态和功能之间的联系，在作物冠层。
Under field conditions, plants are subject to wind-induced movement which creates fluctuations of light intensity and spectral quality reaching the leaves, defined here as windflecks. Within this study, irradiance within two contrasting wheat (Triticum aestivum) canopies during full sun conditions was measured using a spectroradiometer to determine the frequency, duration and magnitude of low- to high-light events plus the spectral composition during wind-induced movement. Similarly, a static canopy was modelled using three-dimensional reconstruction and ray tracing to determine fleck characteristics without the presence of wind. Corresponding architectural traits were measured manually and in silico including plant height, leaf area and angle plus biomechanical properties. Light intensity can differ up to 40% during a windfleck, with changes occurring on a sub-second scale compared to similar to 5 min in canopies not subject to wind. Features such as a shorter height, more erect leaf stature and having an open structure led to an increased frequency and reduced time interval of light flecks in the CMH79A canopy compared to Paragon. This finding illustrates the potential for architectural traits to be selected to improve the canopy light environment and provides the foundation to further explore the links between plant form and function in crop canopies.