Assertion: tulip's bulb | /r/CapableOf | trigger by increase
Facets:
value: in sensitivity to the phytohormone auxin
type: OTHER
Source sentences:
text: April and May. Bulbs are extremely resistant to frost and can tolerate temperatures well below freezing — a period of low temperature is necessary to induce proper growth and flowering, triggered by an increase in sensitivity to the phytohormone auxin.