Definition of photoperiod in English:

photoperiod

noun ˈfəʊtəʊpɪərɪədˈfoʊdoʊˌpɪriəd

Zoology Botany

The period of time each day during which an organism receives illumination; day length.
〔植，动〕光周期；昼长
Example sentencesExamples
- For enzymatic activities and sugar determinations, samples were collected at the middle of the photoperiod.
- Applying balancing pressure did not affect the growth of N-deprived plants except during the photoperiod of day 3 and the dark period of day 4.
- The greenhouse was heated all winter and supplemental lighting extended the photoperiod to prevent dormancy.
- Measurements and sampling were done in the middle of the photoperiod at all sampling times.
- Canola seedlings were grown in chambers at 23°C, 50% humidity, under 16/8 h day/night photoperiods.

Derivatives

photoperiodic

adjective fəʊtəʊpɪərɪˈɒdɪkˌfoʊdoʊˌpɪriˈɑdɪk

Botany Zoology

Leaves communicate photoperiodic signals to meristems, stolons and buds in flowering, tuberization and dormancy.
Example sentencesExamples
- To expose gametophytes to particular photoperiodic conditions, the bagged Petri plates were placed in a light-tight box over which was installed the fluorescent source.
- Within species that show latitudinal variation in both thermal and photoperiodic response, that of photoperiodic response tracks the climatic gradient more closely.
- It was assumed that factors that are under photoperiodic control would show a clinal order among the ecotypes.
- Some songbirds modify their sensitivity to the usual photoperiodic cues that control breeding onset, such that photoperiod response thresholds differ between populations at different latitudes.

Definition of photoperiod in US English:

photoperiod

nounˈfoʊdoʊˌpɪriədˈfōdōˌpirēəd

Botany Zoology

The period of time each day during which an organism receives illumination; day length.
〔植，动〕光周期；昼长
Example sentencesExamples
- Measurements and sampling were done in the middle of the photoperiod at all sampling times.
- The greenhouse was heated all winter and supplemental lighting extended the photoperiod to prevent dormancy.
- For enzymatic activities and sugar determinations, samples were collected at the middle of the photoperiod.
- Canola seedlings were grown in chambers at 23°C, 50% humidity, under 16/8 h day/night photoperiods.
- Applying balancing pressure did not affect the growth of N-deprived plants except during the photoperiod of day 3 and the dark period of day 4.

单词	photoperiod
释义	Definition of photoperiod in English: photoperiod noun ˈfəʊtəʊpɪərɪədˈfoʊdoʊˌpɪriəd Zoology Botany The period of time each day during which an organism receives illumination; day length. 〔植，动〕光周期；昼长 Example sentencesExamples For enzymatic activities and sugar determinations, samples were collected at the middle of the photoperiod. Applying balancing pressure did not affect the growth of N-deprived plants except during the photoperiod of day 3 and the dark period of day 4. The greenhouse was heated all winter and supplemental lighting extended the photoperiod to prevent dormancy. Measurements and sampling were done in the middle of the photoperiod at all sampling times. Canola seedlings were grown in chambers at 23°C, 50% humidity, under 16/8 h day/night photoperiods. Derivatives photoperiodic adjective fəʊtəʊpɪərɪˈɒdɪkˌfoʊdoʊˌpɪriˈɑdɪk Botany Zoology Leaves communicate photoperiodic signals to meristems, stolons and buds in flowering, tuberization and dormancy. Example sentencesExamples To expose gametophytes to particular photoperiodic conditions, the bagged Petri plates were placed in a light-tight box over which was installed the fluorescent source. Within species that show latitudinal variation in both thermal and photoperiodic response, that of photoperiodic response tracks the climatic gradient more closely. It was assumed that factors that are under photoperiodic control would show a clinal order among the ecotypes. Some songbirds modify their sensitivity to the usual photoperiodic cues that control breeding onset, such that photoperiod response thresholds differ between populations at different latitudes. Definition of photoperiod in US English: photoperiod nounˈfoʊdoʊˌpɪriədˈfōdōˌpirēəd Botany Zoology The period of time each day during which an organism receives illumination; day length. 〔植，动〕光周期；昼长 Example sentencesExamples Measurements and sampling were done in the middle of the photoperiod at all sampling times. The greenhouse was heated all winter and supplemental lighting extended the photoperiod to prevent dormancy. For enzymatic activities and sugar determinations, samples were collected at the middle of the photoperiod. Canola seedlings were grown in chambers at 23°C, 50% humidity, under 16/8 h day/night photoperiods. Applying balancing pressure did not affect the growth of N-deprived plants except during the photoperiod of day 3 and the dark period of day 4.
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