Use of Ethylene and Nitrate to Break Seed Dormancy of Common Lambsquarters (Chenopodium album)
| Autor: | Mary S. Spencer, Pawan K. Bassi, Hargurdeep S. Saini |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
0106 biological sciences
Ethylene biology Chenopodium Seed dormancy 04 agricultural and veterinary sciences Plant Science biology.organism_classification 01 natural sciences food.food 010602 entomology chemistry.chemical_compound Horticulture food chemistry Agronomy Germination 040103 agronomy & agriculture Lambsquarters 0401 agriculture forestry and fisheries Dormancy Imbibition Agronomy and Crop Science Ethephon |
| Zdroj: | Weed Science. 34:502-506 |
| ISSN: | 1550-2759 0043-1745 |
| Popis: | Effects of ethylene and KNO3on the germination of dormant common lambsquarters (Chenopodium albumL. # CHEAL) seed were studied under controlled environmental conditions. Ethylene, applied in the gaseous form or as an aqueous solution of ethephon (2-chloroethylphosphonic acid), was able to overcome the dormancy of over 70% of the seed. The optimum concentrations of ethylene and ethephon were 10 μL·L-1and 100 mg·L-1, respectively. The dormancy-breaking action of ethylene was dependent on the availability of nitrate. Hence, seed containing a high level of endogenous nitrate responded readily to ethylene, whereas nitrate-deficient seed required a combined application of ethylene and nitrate. Stimulation of seed germination by ethylene was observed in soil at all depths studied (up to 15 cm). The sensitivity of seed to ethylene increased upon imbibition to reach a peak on the third day, followed by a steady decline. Consequently, the greatest promotion of germination occurred when ethylene was administered during the first 3 to 4 days of imbibition. The loss of seed sensitivity was neither preempted nor overcome by an exogenous supply of KNO3, and may imply that the seed had passed into secondary dormancy. The present findings could form the basis for the use of ethylene to accomplish commercially significant promotion of germination in the field and thus improve the efficiency of the control of common lambsquarters. |
| Databáze: | OpenAIRE |
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