Interference of allelopathic rice with penoxsulam-resistant barnyardgrass
| Autor: | Xia Yang, Yong-Feng Li, Chui-Hua Kong, Xue-Fang Yang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
education.field_of_study Population food and beverages 04 agricultural and veterinary sciences General Medicine Biology Weed control 01 natural sciences chemistry.chemical_compound Momilactone B Root length chemistry Agronomy Insect Science Shoot 040103 agronomy & agriculture Herbicide resistance 0401 agriculture forestry and fisheries Tricin education Agronomy and Crop Science Allelopathy 010606 plant biology & botany |
| Zdroj: | Pest Management Science. 73:2310-2317 |
| ISSN: | 1526-498X |
| DOI: | 10.1002/ps.4617 |
| Popis: | BACKGROUND Despite increasing knowledge of allelopathic rice interference with barnyardgrass, relatively little is known about its action on herbicide-resistant barnyardgrass. The incidence of herbicide-resistant barnyardgrass is escalating in paddy fields. It is warranted to understand interference of allelopathic rice with herbicide-resistant barnyardgrass and potential mechanisms. RESULTS Penoxsulam-resistant and -susceptible barnyardgrass biotypes were identified and segregated from a putative penoxsulam-resistant population occurring in China paddy fields. Allelopathic rice inhibited the growth of barnyardgrass roots more than shoots regardless of biotypes. In particular, there was a stronger inhibition for resistant barnyardgrass than for susceptible barnyardgrass. Allelopathic rice significantly reduced total root length, total root area, maximum root amplitude and maximum root depth of barnyardgrass. Furthermore, rice allelochemicals tricin and momilactone B inhibited the growth of both resistant and susceptible barnyardgrass. Compared with root contact, root segregation significantly increased inhibition of barnyardgrass with an increase in rice allelochemicals. The root exudates from barnyardgrass induced the production of rice allelochemicals, but the effect of susceptible barnyardgrass was much stronger than that of resistant barnyardgrass. CONCLUSION Allelopathic rice can interfere with the growth of penoxsulam-resistant barnyardgrass through allelochemical-mediated root interactions. This kind of allelopathic interference may provide a non-herbicidal alternative for herbicide-resistant weed management in paddy systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text