Long Periodism on the Speed of Nine O’clock Flowers (Portulaca grandiflora)

Intan Oktaviani; Melinda Agustina; Hemalia Susanti; Muncar Sundari; Erliana Putri Isnanto; Khalisah Nabila Putri

doi:10.29303/jbt.v25i1.8344

Long Periodism on the Speed of Nine O’clock Flowers (Portulaca grandiflora)

Authors

Intan Oktaviani , Melinda Agustina , Hemalia Susanti , Muncar Sundari , Erliana Putri Isnanto , Khalisah Nabila Putri

DOI:

10.29303/jbt.v25i1.8344

Published:

2025-01-30

Issue:

Vol. 25 No. 1 (2025): Januari - Maret

Keywords:

Irradiance, Portulaca grandiflora, photoperiodism, responses.

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Oktaviani, I., Agustina, M., Susanti, H., Sundari, M., Isnanto, E. P., & Putri, K. N. (2025). Long Periodism on the Speed of Nine O’clock Flowers (Portulaca grandiflora). Jurnal Biologi Tropis, 25(1), 424–430. https://doi.org/10.29303/jbt.v25i1.8344

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Abstract

Long photoperiods can delay flower initiation and slow down the growth and formation of flower primordia, which can postpone flowering. This study aims to determine the photoperiodic response of the Nine O'clock flower (Portulaca grandiflora) to short light exposure. The research was conducted over one month (November-December 2024), with data collection specifically carried out on December 7, 2024, in Jombor Village, Bendosari District, Sukoharjo Regency, Central Java, from 05:08 AM to 10:00 AM. Observations were made on 19 plants to record blooming times, and data were analyzed descriptively and qualitatively. The results indicated that the blooming times of the Nine O'clock flower varied slightly among the observed plants, with an average blooming time of approximately 2 hours. In conclusion, while the Nine O'clock flower exhibits slight variations in blooming times, further research is recommended, particularly in locations with different altitudes. This study contributes to the understanding of the photoperiodic response of Portulaca grandiflora and its cultivation practices.

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Long Periodism on the Speed of Nine O’clock Flowers (Portulaca grandiflora)

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