ISSN: 0041-3216 (Online), 0041-3216 (Print)
Volume 69 Number 3
Effects of pre-germination treatments on seedling establishment and development of Plantago ovata Forsk.
The interactions between different treatments to promote germination in Plantago ovata Forsk. were examined. Seed germination showed a logistic decline with increasing temperature. Fresh seed had zero germination at sowing temperatures of 25°C. Addition of KNO3, GA3 or GA4 and ageing seed gave additive increases to the temperature at which 100% germination was achieved. Low-temperature seed treatments were shown to decrease germination times and time to 50% flowering by up to 3 weeks. Gibberellin treatments reduced seed survival as well as having minor effects on rate of germination, length of vegetative phase and plant growth. A one-day pretreatment of fresh seed with low temperatures (l5°C) and 10-5 GA3 gave seed which would germinate and survive after transplanting into pots.
Keywords: Temperature; Seed dormancy; Gibberellin; Flowering; Plantago ovata; Psyllium; New crop