Physiology of flowering (Photoperiodism and Vernalization) _MCQ_Basic Level

Physiology of flowering (Photoperiodism and Vernalization) - Basic

Dear Readers,

Physiology of flowering It involves two steps. 1. Events in the bud leading to flowering: a. Induction: -flowering stimulus is generated. -Influenced by water stress, chilling temperature or photoperiod.

Q1.  The pigment involved in red-far red light interconversion is

•  Cytochrome
•  Xanthophyll
•  Lycopen
•  Phytochrome

Phytochrome

Q2.  Which one of the following statements is true for the phytochrome

•  Phytochrome is a phytohormone
•  Phytochrome is a photosynthetic pigment
•  Phytochrome is a pigment that controls growth, photomorphogenesis and development of many plants
•  Phytochrome is a regulatory protein that controls several dark-dependent developmental processes

Phytochrome is a pigment that controls growth, photomorphogenesis and development of many plants

Q3.  In many plants the change over from vegetative to reproductive phase takes place in response to

•  The length of the day
•  The severity of temperature
•  Mainly the food material available in soil
•  Oxygen present in the air

The length of the day

Q4.  When the dark period of short day plants is interrupted by a brief exposure of light, then the plant

•   Will not flower at all
•   Flower immediately
•  Give more flowers
•  Turn into a long day plant

Will not flower at all

Q5. Which one of the following is an excellent example of physiological preconditioning

•  Photosynthesis
•  Respiration
•  Photoperiodism
•  Vernalization

Photoperiodism

Q6. The term "photoperiodism" was proposed by or The phenomenon of photoperiodism in plants was discovered by

•  Lysenko and Thimann
•   Blackmann and Skoog
•   Garner and Allard
•  Chailakhyan and Borthwick

Garner and Allard

Q7.  Skototropic movements are induced by

•  Night
•   Light
•  Touch
•  Heat

Night

Q8.  Prolongation of continuous darkness will initiate

•  Early flowering in short day plants
•   Delay flowering in short day plants
•   Flowering will not be effected
•   None of these

Early flowering in short day plants

Q9. Most of the plants are seasonal due to

•  Photoperiodism
•  Phototropism
•  Photosynthesi
•   Photolysis

Photoperiodism

Q10.  Which of the following is not short-day plant

•   Saccharum officinarum
•   Solanum tuberosum
•   Glycine max
•   Brassica compestris

Solanum tuberosum