Reneau Jonathan, Ouslander Noah, Sparks Erin E
Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware, United States.
MicroPubl Biol. 2024 Apr 2;2024. doi: 10.17912/micropub.biology.001189. eCollection 2024.
Maize brace roots develop from aboveground stem nodes in both upright and vertically displaced stalks. The cues that trigger brace root development after displacement are unknown. Possibilities include disturbance of the belowground roots, gravity, moisture, physical interaction, or node anatomical changes. We show that brace root formation occurs at all growth stages, with more nodes producing brace roots when plants are displaced at later growth stages. This occurs with the underground roots intact, without moisture accumulation and without physical interaction. We propose that the formation of brace roots after vertical stalk displacement is most likely due to gravity or anatomical changes at the node.
玉米支持根在直立和垂直移位的茎秆的地上茎节处发育。移位后触发支持根发育的线索尚不清楚。可能的因素包括地下根的扰动、重力、水分、物理相互作用或节的解剖结构变化。我们发现，支持根在所有生长阶段都会形成，当植株在较晚生长阶段移位时，更多的节会产生支持根。这一过程中地下根保持完整，没有水分积聚，也没有物理相互作用。我们认为，垂直茎秆移位后支持根的形成很可能是由于重力或节处的解剖结构变化。
