Plant Growth and Development Question 74

74. Which one is a long-day plant?

[2001]

(a) Tobacco

(c) Mirabilis jalapa

(b) Glycine max

(d) Spinach

Show Answer

Answer : d

Hints & Solutions

(d) Long day plants undergo flowering after receiving light above a critical day length. e.g. Spinach, sugarbeet. Short day plants flower only when they receive light below a critical day length. e.g. Glycine max, Tobacco.