.png){kind=icon}
.png){kind=icon}
Return
Enhanced Nitrogen Uptake and Early Flowering Mitigate Fitness Costs Associated With Glufosinate Resistance in Goosegrass (Eleusine indica)
.png){kind=icon}
OA
AI
X
H
J
Y
X
Z
DOI：10.1002/fes3.70250.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Herbicide resistance in weeds is frequently accompanied by fitness trade-offs that compromise survival and reproductive success. In this study, we investigated a glufosinate-resistant (R) population of Eleusine indica, in which the GS1-1Ser59Gly mutation confers resistance to glufosinate, alongside a susceptible (S) population. Both R and S populations achieved 100% final germination under natural germination conditions, with no significant difference in germination rate. However, R plants displayed significantly earlier tillering and flowering in both monoculture and mixed growth conditions, approximately 15 days earlier than the S population, indicating accelerated reproductive timing. This precocity incurred a substantial fitness cost, manifested as a ~60% reduction in seed production per plant and reduced competitive suppression of rice growth. Transcriptomic analysis identified EiMADS56, a key-flowering regulatory gene, that was significantly upregulated (2.2- to 3.1-fold) in the R population, and its over-expression of EiMADS56 in Arabidopsis thaliana advanced flowering by approximately 7 days. Moreover, the R population demonstrated enhanced ammonium nitrogen (NH4+) uptake and transport efficiency, suggesting a mechanistic link between improved nitrogen utilization and early reproduction. These results suggest that the GS1-1Ser59Gly mutation may drive fitness trade-offs in glufosinate-resistant E. indica via nitrogen uptake-mediated reproductive acceleration, thereby providing preliminary insights for refining herbicide resistance management and ecological risk evaluation.
Keywords:
early flowering gene EiMADS56
Eleusine indica
fitness
interspecific competition
nitrogen uptake rate
Journal
IF:
4.5
Papers:
755
Citations:
2.7K