Maize lodging resistance: Stalk architecture is a stronger predictor of stalk bending strength than chemical composition
Maize lodging resistance: Stalk architecture is a stronger predictor of stalk bending strength than chemical composition
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DOI：
10.1016/j.biosystemseng.2022.04.010
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发表时间：
2022-05-17
影响因子：
5.1
通讯作者：
Cook, Douglas D.
中科院分区：
文献类型：
--
作者：
Robertson, Daniel J.;Brenton, Zachary W.;Cook, Douglas D.
谷物秸秆的化学成分已被广泛研究，长期以来一直被认为对秸秆倒伏有重要影响。然而，很少有人注意到茎结构（即解剖和形态的物理特征）的影响。我们在这项研究中表明，秸秆结构是更有影响力的秸秆弯曲强度（抗倒伏性的常用措施）比化学成分。这一见解是通过结构工程原理和使用两种主要谷物物种（玉米和高粱）的逐株实验设计的新颖组合获得的。抗倒伏性量化秸秆弯曲强度，提供植物的具体数据，同时也消除了对天气事件的依赖。本研究还测定了每种植物茎的解剖结构、形态特征和化学成分。统计结果表明：（a）通过工程梁理论对茎结构的量化对茎抗弯强度的预测比对成分的预测高4倍;（B）茎结构与化学成分是相互关联的。这些结果解释了为什么以前试图将化学和住宿联系起来的研究不一致。此外，这些结果表明，未来的研究，旨在研究倒伏不能忽视的主导影响，茎结构。(c)2022作者（S）由Elsevier Ltd代表IAgrE出版。这是一个在CC BY-NC-ND许可证下的开放获取文章（http：//creativecommons.org/licenses/by-nc-nd/4.0/）。
The chemical composition of grain stalks has been extensively studied and has long been assumed to have a major influence on stalk lodging. However, much less attention has been given to the influence of stalk architecture (i.e. physical features of anatomy and morphology). We show in this study that stalk architecture is far more influential on stalk bending strength (a common measure of lodging resistance) than chemical composition. This insight was obtained through the novel combination of structural engineering prin-ciples and a plant-by-plant experimental design using two major grain species (maize and sorghum). Lodging resistance was quantified using stalk bending strength which provides plant-specific data while also removing dependence on weather events. Stalk anatomy and morphology as and chemical composition of the stalk were also measured for each spec-imen in this study. Statistical results indicate that (a) the quantification of stem architec-ture via engineering beam theory is four times more predictive of stalk bending strength than composition, and (b) stalk architecture and chemical composition are interrelated. These results explain why previous studies attempting to link chemistry and lodging have been inconsistent. Furthermore, these results indicate that future studies aimed at studying lodging must not overlook the dominant influence of stalk architecture.(c) 2022 The Author(s). Published by Elsevier Ltd on behalf of IAgrE. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).