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Aquaporin Expression and Water Transport Pathways inside Leaves Are Affected by Nitrogen Supply through Transpiration in Rice Plants
- Source :
- International Journal of Molecular Sciences, Vol 19, Iss 1, p 256 (2018), International Journal of Molecular Sciences; Volume 19; Issue 1; Pages: 256, International Journal of Molecular Sciences
- Publication Year :
- 2018
- Publisher :
- MDPI AG, 2018.
-
Abstract
- The photosynthetic rate increases under high-N supply, resulting in a large CO2 transport conductance in mesophyll cells. It is less known that water movement is affected by nitrogen supply in leaves. This study investigated whether the expression of aquaporin and water transport were affected by low-N (0.7 mM) and high-N (7 mM) concentrations in the hydroponic culture of four rice varieties: (1) Shanyou 63 (SY63), a hybrid variant of the indica species; (2) Yangdao 6 (YD6), a variant of indica species; (3) Zhendao 11 (ZD11), a hybrid variant of japonica species; and (4) Jiuyou 418 (JY418), another hybrid of the japonica species. Both the photosynthetic and transpiration rate were increased by the high-N supply in the four varieties. The expressions of aquaporins, plasma membrane intrinsic proteins (PIPs), and tonoplast membrane intrinsic protein (TIP) were higher in high-N than low-N leaves, except in SY63. Leaf hydraulic conductance (Kleaf) was lower in high-N than low-N leaves in SY63, while Kleaf increased under high-N supply in the YD6 variant. Negative correlations were observed between the expression of aquaporin and the transpiration rate in different varieties. Moreover, there was a significant negative correlation between transpiration rate and intercellular air space. In conclusion, the change in expression of aquaporins could affect Kleaf and transpiration. A feedback effect of transpiration would regulate aquaporin expression. The present results imply a coordination of gas exchange with leaf hydraulic conductance.
- Subjects :
- 0106 biological sciences
0301 basic medicine
leaf hydraulic conductance
Aquaporin
chemistry.chemical_element
Vacuole
Photosynthesis
01 natural sciences
Article
Catalysis
Japonica
nitrogen
transpiration
Inorganic Chemistry
lcsh:Chemistry
03 medical and health sciences
Cell Wall
Gene Expression Regulation, Plant
aquaporins
Physical and Theoretical Chemistry
Molecular Biology
lcsh:QH301-705.5
Spectroscopy
Plant Proteins
Transpiration
Water transport
photosynthesis
biology
Air
Organic Chemistry
Water
Conductance
Biological Transport
Oryza
Plant Transpiration
General Medicine
biology.organism_classification
Nitrogen
Computer Science Applications
Plant Leaves
Horticulture
030104 developmental biology
chemistry
lcsh:Biology (General)
lcsh:QD1-999
Gases
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 14220067
- Volume :
- 19
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- International Journal of Molecular Sciences
- Accession number :
- edsair.doi.dedup.....4de76281ba38d5996f0fde78d9bde623