Skip to main content

Table 3 Heat treatment: Relative germination rate of Adansonia digitata seeds after 10 weeks [%]

From: Adansonia digitata germination tests. Elephants or heat: what causes scarification of seed to facilitate germination?

Treatment2017a2017b20182019b/2020Average
Cold water for 3 days010 0.3
In hot water for 40 min 70°C7073426362**
Short-time heat treatment
 In oven for 5 min 75°C   5151**
 In oven for 5 min 100°C   7878**
 In oven for 5 min 125°C   1111**
 In oven for 5 min 150°C   33
Long-time heat treatment
 In oven for 40 min 50°C  13 13**
 In oven for 40 min 75°C  64 64**
 In oven for 40 min 100°C  0 0
 In oven for 40 min 125°C  0 0
 In wet sand in oven for 40 min 50°C  8 8**
 In wet sand in oven for 40 min 75°C  72 72**
 In wet sand in oven for 40 min 100°C  0 0
 In wet sand in oven for 40 min 125°C  0 0
Combination of elephants´ digestion and heat treatment
 Elephants´ digestion + in oven 5 min 75°C   2424**
 Elephants´ digestion + in oven 5 min 100°C   2828**
 Elephants´ digestion + in oven 5 min 125°C   1616**
 Elephants´ digestion + in oven 5 min 150°C   44*
  1. Results obtained in three test setups with 100 seeds per treatment each, except 50 seeds for combination of elephant’s digestion and heat treatment: 2017a, 2017b, 2018 and 2019b. Significant increase of GR compared to the control without treatment are indicated with *P<0.05, **P<0.01