| Short Day Plants $(SDP)$ | Long Day Plants $(LDP)$ |
|---|---|
| $(1)$ They are known as $SDP$. | $(1)$ They are known as $LDP$. |
| $(2)$ They require a relatively short daylight period and a continuous dark period of about $14-16$ hours for flowering. | $(2)$ They require a longer daylight period ($14-16$ hours) in a $24$-hour cycle for flowering. |
| $(3)$ In $SDP$,the dark period is critical and must be continuous. | $(3)$ In $LDP$,the light period is critical for the induction of flowering. |
| $(4)$ Examples include sugarcane,tobacco,soybean,and $Xanthium$. | $(4)$ Examples include sugar beet,lettuce,oat,radish,and wheat. |
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