Physiological Response of Rice Seedlings (Oryza sativa L.) Subjected to Different Periods of Two Night Temperatures
Night temperatures have shown an increase in rice-growing regions due to climate change in Colombia in recent years, causing a reduction in grain yield. The objective of this research was to study the effect of four different periods of exposure to two night temperatures (24°C vs. 30°C) on the physi...
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| Format: | Article |
| Language: | English |
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"Vikol publishing" ST Kolesnichenko V.V.
2017-02-01
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| Series: | Journal of Stress Physiology & Biochemistry |
| Subjects: | |
| Online Access: | http://www.jspb.ru/issues/2017/N1/JSPB_2017_1_35-43.pdf |
| _version_ | 1811248042430431232 |
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| author | Oscar Alvarado-Sanabria Gabriel Garcés-Varón Hermann Restrepo-Díaz |
| author_facet | Oscar Alvarado-Sanabria Gabriel Garcés-Varón Hermann Restrepo-Díaz |
| author_sort | Oscar Alvarado-Sanabria |
| collection | DOAJ |
| description | Night temperatures have shown an increase in rice-growing regions due to climate change in Colombia in recent years, causing a reduction in grain yield. The objective of this research was to study the effect of four different periods of exposure to two night temperatures (24°C vs. 30°C) on the physiological behavior of an Indica rice cultivar widely grown in Colombia. Fedearroz 60 (ʻF60ʼ) were grown under greenhouse conditions for forty-five days. After this period, 12 plants in each treatment was established in a growth chamber at 30°C from 18:00 to 24:00 to carry out the duration of the different periods of heat nighttime stress (4, 8, 12, and 16 days respectively). The control plants were kept in a greenhouse at 24°C. The results showed that leaf photosynthesis, carboxylation efficiency, and pigment content decreased in rice seedlings subjected to 30°C. Also, dark respiration and intercellular CO2 concentration increased. These reductions in the variables as mentioned above were more severe during the first four days of exposure to 30°C than 24°C. In conclusion, these results suggest that these physiological variables may be useful to assess the tolerance of rice plants to high nighttime temperatures in plant breeding programs. |
| first_indexed | 2024-04-12T15:21:07Z |
| format | Article |
| id | doaj.art-e2d2464c998449ee955f5e8b09e6f248 |
| institution | Directory Open Access Journal |
| issn | 1997-0838 1997-0838 |
| language | English |
| last_indexed | 2024-04-12T15:21:07Z |
| publishDate | 2017-02-01 |
| publisher | "Vikol publishing" ST Kolesnichenko V.V. |
| record_format | Article |
| series | Journal of Stress Physiology & Biochemistry |
| spelling | doaj.art-e2d2464c998449ee955f5e8b09e6f2482022-12-22T03:27:28Zeng"Vikol publishing" ST Kolesnichenko V.V.Journal of Stress Physiology & Biochemistry1997-08381997-08382017-02-011313543Physiological Response of Rice Seedlings (Oryza sativa L.) Subjected to Different Periods of Two Night TemperaturesOscar Alvarado-Sanabria0Gabriel Garcés-Varón1Hermann Restrepo-Díaz2aDepartamento de Agronomia, Facultd de Ciencias Agrarias, Universidad Nacional de Colombia. Carrera 30 No 45-03, Bogota D.C., ColombiaSeccional Saldaсa, Federaciуn Nacional de Arroceros (Fedearroz). Carrera 18 # 23-112, Saldaсa, ColombiaDepartamento de Agronomia, Facultad de Ciencias Agrarias, Universidad Nacional de Colombia. Carrera 30 No 45-03, Bogota D.C., ColombiaNight temperatures have shown an increase in rice-growing regions due to climate change in Colombia in recent years, causing a reduction in grain yield. The objective of this research was to study the effect of four different periods of exposure to two night temperatures (24°C vs. 30°C) on the physiological behavior of an Indica rice cultivar widely grown in Colombia. Fedearroz 60 (ʻF60ʼ) were grown under greenhouse conditions for forty-five days. After this period, 12 plants in each treatment was established in a growth chamber at 30°C from 18:00 to 24:00 to carry out the duration of the different periods of heat nighttime stress (4, 8, 12, and 16 days respectively). The control plants were kept in a greenhouse at 24°C. The results showed that leaf photosynthesis, carboxylation efficiency, and pigment content decreased in rice seedlings subjected to 30°C. Also, dark respiration and intercellular CO2 concentration increased. These reductions in the variables as mentioned above were more severe during the first four days of exposure to 30°C than 24°C. In conclusion, these results suggest that these physiological variables may be useful to assess the tolerance of rice plants to high nighttime temperatures in plant breeding programs.http://www.jspb.ru/issues/2017/N1/JSPB_2017_1_35-43.pdfChlorophyll fluorescenceLeaf photosynthesisleaf respirationPhotosynthetic pigments |
| spellingShingle | Oscar Alvarado-Sanabria Gabriel Garcés-Varón Hermann Restrepo-Díaz Physiological Response of Rice Seedlings (Oryza sativa L.) Subjected to Different Periods of Two Night Temperatures Journal of Stress Physiology & Biochemistry Chlorophyll fluorescence Leaf photosynthesis leaf respiration Photosynthetic pigments |
| title | Physiological Response of Rice Seedlings (Oryza sativa L.) Subjected to Different Periods of Two Night Temperatures |
| title_full | Physiological Response of Rice Seedlings (Oryza sativa L.) Subjected to Different Periods of Two Night Temperatures |
| title_fullStr | Physiological Response of Rice Seedlings (Oryza sativa L.) Subjected to Different Periods of Two Night Temperatures |
| title_full_unstemmed | Physiological Response of Rice Seedlings (Oryza sativa L.) Subjected to Different Periods of Two Night Temperatures |
| title_short | Physiological Response of Rice Seedlings (Oryza sativa L.) Subjected to Different Periods of Two Night Temperatures |
| title_sort | physiological response of rice seedlings oryza sativa l subjected to different periods of two night temperatures |
| topic | Chlorophyll fluorescence Leaf photosynthesis leaf respiration Photosynthetic pigments |
| url | http://www.jspb.ru/issues/2017/N1/JSPB_2017_1_35-43.pdf |
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