Effects of Silicon on Transpiration and Leaf Conductance in Rice Plants (Oryza sativa L.)
To characterize the protection effect of silicon against excessive transpiration in rice plants (Oryza sativa L.), we investigated the factors responsible for transpiration, such as cuticular conductance (gc), leaf surface wax content (WC), and stomatal movement in response to environmental stimuli,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
1998-01-01
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| Series: | Plant Production Science |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1626/pps.1.89 |
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| author | Sakae Agarie Hideki Uchida Waichi Agata Fumitake Kubota Peter B. Kaufman |
| author_facet | Sakae Agarie Hideki Uchida Waichi Agata Fumitake Kubota Peter B. Kaufman |
| author_sort | Sakae Agarie |
| collection | DOAJ |
| description | To characterize the protection effect of silicon against excessive transpiration in rice plants (Oryza sativa L.), we investigated the factors responsible for transpiration, such as cuticular conductance (gc), leaf surface wax content (WC), and stomatal movement in response to environmental stimuli, using leaves of plants grown in nutrient solution with silicon (+Si) and without silicon (–Si). The rate of transpiration of whole plants (E) under field conditions was clearly reduced by application of silica. The gc of –Si leaves under precisely regulated conditions was 33% higher than that of +Si leaves, reflecting higher adaxial gc. Silicon has little effect on WC, a factor responsible for regulation of cuticular resistance to water flux in rice leaves. These results suggest that silicon is one of the main factors responsible for regulation of gc, but that its effect was not due to an increase in the WG. Leaf conductance (gl) of –Si leaves tended to decrease more slowly than that of +Si leaves over time after changes from high to low light intensity. Moreover, it was always higher over the entire duration of the experiment, irrespective of irradiation intensity. The gl of –Si leaves was higher at lower relative humidity (RH) and the initial response to a subsequent increase in RH was slower than that of +Si leaves. A comparison of gl and gc between +Si and –Si leaves showed that the higher gl of –Si leaves was due to higher stomatal conductance. These results indicated that the reduction in E by application of silica was mainly attributable to reduction in the rate of transpiration through stomatal pores. |
| first_indexed | 2024-12-23T19:48:06Z |
| format | Article |
| id | doaj.art-4aaaac6a1438409ca740d07260023583 |
| institution | Directory Open Access Journal |
| issn | 1343-943X 1349-1008 |
| language | English |
| last_indexed | 2024-12-23T19:48:06Z |
| publishDate | 1998-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Plant Production Science |
| spelling | doaj.art-4aaaac6a1438409ca740d072600235832022-12-21T17:33:27ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10081998-01-0112899510.1626/pps.1.8911644307Effects of Silicon on Transpiration and Leaf Conductance in Rice Plants (Oryza sativa L.)Sakae AgarieHideki Uchida0Waichi Agata1Fumitake Kubota2Peter B. Kaufman3Faculty of Agriculture, Kyushu UniversityFaculty of Agriculture, Kyushu UniversityFaculty of Agriculture, Kyushu UniversityUniversity of MichiganTo characterize the protection effect of silicon against excessive transpiration in rice plants (Oryza sativa L.), we investigated the factors responsible for transpiration, such as cuticular conductance (gc), leaf surface wax content (WC), and stomatal movement in response to environmental stimuli, using leaves of plants grown in nutrient solution with silicon (+Si) and without silicon (–Si). The rate of transpiration of whole plants (E) under field conditions was clearly reduced by application of silica. The gc of –Si leaves under precisely regulated conditions was 33% higher than that of +Si leaves, reflecting higher adaxial gc. Silicon has little effect on WC, a factor responsible for regulation of cuticular resistance to water flux in rice leaves. These results suggest that silicon is one of the main factors responsible for regulation of gc, but that its effect was not due to an increase in the WG. Leaf conductance (gl) of –Si leaves tended to decrease more slowly than that of +Si leaves over time after changes from high to low light intensity. Moreover, it was always higher over the entire duration of the experiment, irrespective of irradiation intensity. The gl of –Si leaves was higher at lower relative humidity (RH) and the initial response to a subsequent increase in RH was slower than that of +Si leaves. A comparison of gl and gc between +Si and –Si leaves showed that the higher gl of –Si leaves was due to higher stomatal conductance. These results indicated that the reduction in E by application of silica was mainly attributable to reduction in the rate of transpiration through stomatal pores.http://dx.doi.org/10.1626/pps.1.89Cuticular conductanceLeaf conductanceRiceSiliconStornataTranspiration |
| spellingShingle | Sakae Agarie Hideki Uchida Waichi Agata Fumitake Kubota Peter B. Kaufman Effects of Silicon on Transpiration and Leaf Conductance in Rice Plants (Oryza sativa L.) Plant Production Science Cuticular conductance Leaf conductance Rice Silicon Stornata Transpiration |
| title | Effects of Silicon on Transpiration and Leaf Conductance in Rice Plants (Oryza sativa L.) |
| title_full | Effects of Silicon on Transpiration and Leaf Conductance in Rice Plants (Oryza sativa L.) |
| title_fullStr | Effects of Silicon on Transpiration and Leaf Conductance in Rice Plants (Oryza sativa L.) |
| title_full_unstemmed | Effects of Silicon on Transpiration and Leaf Conductance in Rice Plants (Oryza sativa L.) |
| title_short | Effects of Silicon on Transpiration and Leaf Conductance in Rice Plants (Oryza sativa L.) |
| title_sort | effects of silicon on transpiration and leaf conductance in rice plants oryza sativa l |
| topic | Cuticular conductance Leaf conductance Rice Silicon Stornata Transpiration |
| url | http://dx.doi.org/10.1626/pps.1.89 |
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