10.6084/M9.FIGSHARE.17085829.V1
Xiaoxin Ye
Xiaoxin
Ye
Meng Zhang
Meng
Zhang
Christopher S. P. McErlean
Christopher S. P.
McErlean
Yongqing Ma
Yongqing
Ma
Nitrogen and phosphorus supply strongly reduced the control efficacy of maize against sunflower broomrape
<p>Heavy infestation by the root parasitic sunflower broomrape over wide regions constitutes a major biological constraint to sunflower production. The use of maize as a trap crop to induce sunflower broomrape germination is considered a cost-effective method for controlling sunflower broomrape. This study was designed to examine the activity of maize to induce sunflower broomrape seeds germination under varying levels of nitrogen (N) and phosphorus (P) fertilization. Orthogonal experiments were conducted during two cropping seasons with four maize cultivars under four levels of N and P application. A significant reduction in sunflower broomrape germination induced by maize root and rhizosphere soil extracts upon N and P application was observed in both 2014 and 2015, with P having the strongest effect on the broomrape germination inducing activity of maize root extracts. Structural equation modelling analysis revealed that N and P supplementation not only directly affected the germination-inducing capacity towards sunflower broomrape of maize root extracts but also had an indirect effect through the impact on abscisic acid contents. This study may contribute to a better understanding of the connection between soil fertility and the production and release of germination stimulants in maize and that can lead to improved control strategies.</p>
Microbiology
Cell Biology
Biotechnology
Ecology
Immunology
Biological Sciences not elsewhere classified
Plant Biology
Taylor & Francis
2021
2021-11-26
2024-02-16
Journal contribution
674988 Bytes
10.6084/m9.figshare.17085829
10.1080/03650340.2021.2004586
CC BY 4.0