ArticleFrontiers in plant science2025
Synergism of 2-(3,4-dichlorophenoxy)triethylamine and top removal enhances maize lodging resistance and yield via coordinated photosynthetic optimization and phenylpropanoid pathway activation.
Article in Frontiers in plant science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Plant growth promoters like 2-(3,4-dichlorophenoxy) triethylamine (DCPTA) increases maize yield but heightens lodging risk. We investigated whether integrating canopy top removal (TR) with DCPTA application resolves this trade-off. Methods: Over 2023-2024 seasons, maize plants were treated with DCPTA, TR, or both. Assessments included: the basal 8th leaf photosynthesis; strength, phenylpropanoid enzyme activity, and structural components deposition in the basal 3rd internode; plus grain yield and lodging incidence. Results: TR counteracted DCPTA-induced suppression of basal leaf photosynthesis and carbon assimilation. Crucially, the combination synergistically enhanced assimilate flux to basal stalks. This influx, potentiated by DCPTA, significantly upregulated phenylpropanoid enzymes versus TR alone, driving enhanced deposition of structural components. Specifically, during the grain-filling stage, the combination significantly enhanced chlorophyll content, gas exchange parameters (P Discussion: The synergy arises because TR alleviates DCPTA's negative effects on basal leaf function, while DCPTA potentiates the phenylpropanoid pathway's response to the assimilate surge triggered by TR. This reciprocal interaction enables simultaneous optimization of photosynthetic efficiency in source leaves and robust activation of stem strengthening mechanisms, achieving higher yield and lodging resistance.
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