Response of Rice Nitrogen Physiology to High Nighttime Temperature during Vegetative Stage

The effects of night temperature on plant morphology and nitrogen accumulation were examined in rice (Oryza sativa L.) during vegetative growth. The results showed that the shoot biomass of the plants was greater at 27°C (high nighttime temperature, HNT) than at 22°C (CK). However, the increase in b...

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Main Authors: Song Chen, Xiaoguo Zhang, Xia Zhao, Danying Wang, Chunmei Xu, Chenglin Ji, Xiufu Zhang
Format: Article
Language:English
Published: Wiley 2013-01-01
Series:The Scientific World Journal
Online Access:http://dx.doi.org/10.1155/2013/649326
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author Song Chen
Xiaoguo Zhang
Xia Zhao
Danying Wang
Chunmei Xu
Chenglin Ji
Xiufu Zhang
author_facet Song Chen
Xiaoguo Zhang
Xia Zhao
Danying Wang
Chunmei Xu
Chenglin Ji
Xiufu Zhang
author_sort Song Chen
collection DOAJ
description The effects of night temperature on plant morphology and nitrogen accumulation were examined in rice (Oryza sativa L.) during vegetative growth. The results showed that the shoot biomass of the plants was greater at 27°C (high nighttime temperature, HNT) than at 22°C (CK). However, the increase in both shoot and root biomasses was not significant under 10 mg N/L. The shoot nitrogen concentrations were 16.1% and 16.7% higher in HNT than in CK under 160 and 40 mg N/L. These results suggest that plant N uptake was enhanced under HNT; however, the positive effect might be limited by the N status of the plants. In addition, leaf area, plant height, root maximum length, root and shoot nitrogen concentrations, soluble leaf protein content, and soluble leaf carbohydrate content were greater in HNT than in CK under 40 and 160 mg N/L, while fresh root volume, root number, and the content of free amino acid in leaf were not significantly different between HNT and CK regardless of nitrogen levels. Moreover, leaf GS activity under HNT was increased at 160 mg N/L compared with that under CK, which might partly explain the positive effect of HNT on soluble protein and carbohydrate content.
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institution Kabale University
issn 1537-744X
language English
publishDate 2013-01-01
publisher Wiley
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series The Scientific World Journal
spelling doaj-art-e24a026894b242539311d907ac6079542025-02-03T01:30:08ZengWileyThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/649326649326Response of Rice Nitrogen Physiology to High Nighttime Temperature during Vegetative StageSong Chen0Xiaoguo Zhang1Xia Zhao2Danying Wang3Chunmei Xu4Chenglin Ji5Xiufu Zhang6China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, Zhejiang 310006, ChinaChina National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, Zhejiang 310006, ChinaChina National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, Zhejiang 310006, ChinaChina National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, Zhejiang 310006, ChinaChina National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, Zhejiang 310006, ChinaChina National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, Zhejiang 310006, ChinaChina National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, Zhejiang 310006, ChinaThe effects of night temperature on plant morphology and nitrogen accumulation were examined in rice (Oryza sativa L.) during vegetative growth. The results showed that the shoot biomass of the plants was greater at 27°C (high nighttime temperature, HNT) than at 22°C (CK). However, the increase in both shoot and root biomasses was not significant under 10 mg N/L. The shoot nitrogen concentrations were 16.1% and 16.7% higher in HNT than in CK under 160 and 40 mg N/L. These results suggest that plant N uptake was enhanced under HNT; however, the positive effect might be limited by the N status of the plants. In addition, leaf area, plant height, root maximum length, root and shoot nitrogen concentrations, soluble leaf protein content, and soluble leaf carbohydrate content were greater in HNT than in CK under 40 and 160 mg N/L, while fresh root volume, root number, and the content of free amino acid in leaf were not significantly different between HNT and CK regardless of nitrogen levels. Moreover, leaf GS activity under HNT was increased at 160 mg N/L compared with that under CK, which might partly explain the positive effect of HNT on soluble protein and carbohydrate content.http://dx.doi.org/10.1155/2013/649326
spellingShingle Song Chen
Xiaoguo Zhang
Xia Zhao
Danying Wang
Chunmei Xu
Chenglin Ji
Xiufu Zhang
Response of Rice Nitrogen Physiology to High Nighttime Temperature during Vegetative Stage
The Scientific World Journal
title Response of Rice Nitrogen Physiology to High Nighttime Temperature during Vegetative Stage
title_full Response of Rice Nitrogen Physiology to High Nighttime Temperature during Vegetative Stage
title_fullStr Response of Rice Nitrogen Physiology to High Nighttime Temperature during Vegetative Stage
title_full_unstemmed Response of Rice Nitrogen Physiology to High Nighttime Temperature during Vegetative Stage
title_short Response of Rice Nitrogen Physiology to High Nighttime Temperature during Vegetative Stage
title_sort response of rice nitrogen physiology to high nighttime temperature during vegetative stage
url http://dx.doi.org/10.1155/2013/649326
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