Similar presentations:
Why do leaves fall in autumn
1. Why do leaves fall in autumn?
2. light duration
LIGHT DURATION•THE RELATIVE LENGTH AT DAY AND NIGHT ARE CALLED AS
PHOTOPERIOD.
•THE RESPONSE OF PLANTS TO THE PHOTOPERIOD
EXPRESSED TO THE FORM OF FLOWENNG IS CALLED AS
PHOTOPENODISM. PHOTOPERIODISM ALSO AFLECTS SEED
AND FRUIT PRODUCTION.
3. According to the duration of lIght plants can be categorized into three groups:
ACCORDING TO THE DURATION OF LIGHTPLANTS CAN BE CATEGORIZED INTO THREE
GROUPS:
SHORT DAY PLANTS
•LONG DAY PLANTS
•DAY NEUTRAL PLANTS
4. Short day plants
SHORT DAY PLANTS•EXAMPLES: CHRYSANTHEMUMS, RICE, CACTUS.
5. Long day plants
LONG DAY PLANTS•EXAMPLE: DILL, SPINACH, CARNAUONS.
6. Day neutral plants
DAY NEUTRAL PLANTS•EXAMPLE: TOMATOES, SUNFLOWER, PEA PLANTS.