Modulating alfalfa growth: impacts of plant growth regulators on physiology, architecture, and seed yield
Xinyao Wang, Yixin Liu, Xiaoqing Sui, Kaihui Li, Amanula Yimingniyazi, Lianwu Jin, Mengqing Lang
TL;DR
This study explores how plant growth regulators can improve alfalfa seed yield by altering plant structure and metabolism.
Contribution
The study identifies an optimal concentration of DPC that significantly enhances alfalfa seed yield and plant architecture.
Findings
A single spray of 0.35 g L−1 DPC increased chloroplast volume, starch granules, and photosynthetic capacity in alfalfa.
DPC treatment improved carbon-nitrogen metabolism and increased seed yield to 329.76 kg·hm−2.
The 0.35 g L−1 DPC treatment had the highest membership degree of effectiveness in plant architecture optimization.
Abstract
Alfalfa seed yield is severely restricted by its indeterminate growth habit, with actual average yield only reaching 4% of potential yield in field production. Plant growth regulators (PGRs) can modulate the balance between vegetative and reproductive growth, yet research on PGR application for alfalfa plant architecture optimization and seed yield improvement remains limited. To address this gap, this study treated “XinMu No.4” alfalfa (Medicago sativa L.) with three PGRs at specific concentration gradients: flumetralin (CAG: 0.5/1.0/1.5 g L− 1), 1,1-dimethyl-piperidinium chloride (DPC: 0.25/0.35/0.45 g L− 1), and compound sodium nitrophenolate (CSN: 0.15/0.20/0.25 g L− 1), to investigate their effects on growth, photosynthetic characteristics, carbon-nitrogen metabolism, and seed yield. Key findings showed that a single spray of 0.35 g L− 1DPC resulted in complete cell structure,…
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Taxonomy
TopicsPlant nutrient uptake and metabolism · Plant Stress Responses and Tolerance · Plant Molecular Biology Research