Ch 11 Growth and development (11.5-11.6)

Length of day (night) directly related to onset of flowering

(a)  

Will not flower unless day length is shorter than a critical period

(a)  

Asters, poinsettias, ragweed, sorghums, strawberries

(a)  

Will not flower unless periods of light are longer than a critical period

(a)  

Beets, larkspur, lettuce, potatoes, spinach, wheat

(a)  

Will not flower if days too short, or too long

(a)  

Several grasses

(a)  

Will flower under any day-length, provided there is minimum amount of light necessary for normal growth

(a)  

Tropical plants, beans, carnations, cotton, roses, tomatoes

(a)  

What are the vegetative activities affected by phototropisms

(a)