Dormancy of wild mustard (Sisymbrium capense) seeds is related to seed coat colour
Wild mustard cultivar 'Kwayimba' has been reported to show seed dormancy, but the role of GA in the species has not been investigated. Seeds of this cultivar were grown to maturity under field conditions (rainfed) and harvested when the pods had turned brown. The seeds were separated into two seed lots on colour basis. The seeds were germinated after treatment with KNO3 or GA3 or pre-chilling. After treatment with GA, amylase activity in the seeds was quantified. The dark brown seed lot (KD) was composed of heavier seeds than the light brown seed lot (KL), which showed high germination. GA3 improved the rate and total germination percentage in wild mustard. The high concentration of GA3 (0.1%) released dormancy in the dark seed lot KD and yielded high α-amylase activity. KNO3 did not improve the germination of wild mustard.
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Document Type: Research Article
Publication date: April 1, 2008
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