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Underground Mechanism to Enhance Nutrient Use Efficiency in Rice
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Underground Mechanism to Enhance Nutrient Use Efficiency in Rice

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: closed (29 October 2021) | Viewed by 9894

Special Issue Editor

Prof. Dr. Ki-Hong Jung

E-Mail Website
Guest Editor
Graduate School of Green-Bio Science, Kyung Hee University, Yongin, Republic of Korea
Interests: rice; root hair development; pollen genetics; ROS process; abiotic stress tolerance; transcirptome analysis; network analysis; genome editing; phylogenomics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Rice (Oryza sativa L.) is not only a major staple food for the world’s population but also a model crop plant for studying the mode of action of agronomically valuable traits, suggesting ideas for application to other crop plants. The roots of the plant demonstrate a range of essential functions, including the acquisition of water and nutrient and structural support. A molecular and genetic understanding of the mechanism by which nutrient use efficiency is enhanced in rice, as a model crop plant, is very important for crop productivity. Advances in integrating omics studies using the genome, transcriptome, proteome, metabolome, and functional genomics will provide valuable insights into low-input and sustainable crop production.

Papers submitted to this Special Issue must report novel results and/or plausible and testable new models. This Special Issue includes studies involving physiological and chemical analysis associated with the transcriptome, proteome, metabolome, and integrating omics for nutrient use efficiency in crop plants and developing crops with enhanced nutrient use efficiency through the improvement of root traits using natural variation, biotechnology, and gene editing techniques. In addition, related database issues are also welcome.

Prof. Dr. Ki-Hong Jung
Guest Editor

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Keywords

  • rice
  • root
  • nutrient use efficiency (nitrogen, phosphate, potassium)
  • utilization of micronutrients (boron, chlorine, copper, iron, manganese, and zinc)
  • reactive oxygen species (ROS)
  • transcriptomics
  • proteomics
  • metabolomics
  • integrating omics
  • genome-wide association study (GWAS)
  • mutant analysis

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Published Papers (2 papers)

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Research

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17 pages, 3241 KiB  
Article
The Rice Cation/H+ Exchanger Family Involved in Cd Tolerance and Transport
by Wenli Zou, Jingguang Chen, Lijun Meng, Dandan Chen, Haohua He and Guoyou Ye
Int. J. Mol. Sci. 2021, 22(15), 8186; https://doi.org/10.3390/ijms22158186 - 30 Jul 2021
Cited by 24 | Viewed by 3338
Abstract
Cadmium (Cd), a heavy metal toxic to humans, easily accumulates in rice grains. Rice with unacceptable Cd content has become a serious food safety problem in many rice production regions due to contaminations by industrialization and inappropriate waste management. The development of rice [...] Read more.
Cadmium (Cd), a heavy metal toxic to humans, easily accumulates in rice grains. Rice with unacceptable Cd content has become a serious food safety problem in many rice production regions due to contaminations by industrialization and inappropriate waste management. The development of rice varieties with low grain Cd content is seen as an economic and long-term solution of this problem. The cation/H+ exchanger (CAX) family has been shown to play important roles in Cd uptake, transport and accumulation in plants. Here, we report the characterization of the rice CAX family. The six rice CAX genes all have homologous genes in Arabidopsis thaliana. Phylogenetic analysis identified two subfamilies with three rice and three Arabidopsis thaliana genes in both of them. All rice CAX genes have trans-member structures. OsCAX1a and OsCAX1c were localized in the vacuolar while OsCAX4 were localized in the plasma membrane in rice cell. The consequences of qRT-PCR analysis showed that all the six genes strongly expressed in the leaves under the different Cd treatments. Their expression in roots increased in a Cd dose-dependent manner. GUS staining assay showed that all the six rice CAX genes strongly expressed in roots, whereas OsCAX1c and OsCAX4 also strongly expressed in rice leaves. The yeast (Saccharomyces cerevisiae) cells expressing OsCAX1a, OsCAX1c and OsCAX4 grew better than those expressing the vector control on SD-Gal medium containing CdCl2. OsCAX1a and OsCAX1c enhanced while OsCAX4 reduced Cd accumulation in yeast. No auto-inhibition was found for all the rice CAX genes. Therefore, OsCAX1a, OsCAX1c and OsCAX4 are likely to involve in Cd uptake and translocation in rice, which need to be further validated. Full article
(This article belongs to the Special Issue Underground Mechanism to Enhance Nutrient Use Efficiency in Rice)
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Review

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15 pages, 1101 KiB  
Review
Molecular Regulatory Networks for Improving Nitrogen Use Efficiency in Rice
by Mengmeng Hou, Ming Yu, Zhiqiang Li, Zhiyuan Ai and Jingguang Chen
Int. J. Mol. Sci. 2021, 22(16), 9040; https://doi.org/10.3390/ijms22169040 - 21 Aug 2021
Cited by 27 | Viewed by 5767
Abstract
Nitrogen is an important factor limiting the growth and yield of rice. However, the excessive application of nitrogen will lead to water eutrophication and economic costs. To create rice varieties with high nitrogen use efficiency (NUE) has always been an arduous task in [...] Read more.
Nitrogen is an important factor limiting the growth and yield of rice. However, the excessive application of nitrogen will lead to water eutrophication and economic costs. To create rice varieties with high nitrogen use efficiency (NUE) has always been an arduous task in rice breeding. The processes for improving NUE include nitrogen uptake, nitrogen transport from root to shoot, nitrogen assimilation, and nitrogen redistribution, with each step being indispensable to the improvement of NUE. Here, we summarize the effects of absorption, transport, and metabolism of nitrate, ammonium, and amino acids on NUE, as well as the role of hormones in improving rice NUE. Our discussion provide insight for further research in the future. Full article
(This article belongs to the Special Issue Underground Mechanism to Enhance Nutrient Use Efficiency in Rice)
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