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result(s) for
"Plant Physiological Phenomena"
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OsIRO2 is responsible for iron utilization in rice and improves growth and yield in calcareous soil
Iron (Fe) deficiency, a worldwide agricultural problem on calcareous soil with low Fe availability, is also a major human nutritional deficit. Plants induce Fe acquisition systems under conditions of low Fe availability. Previously, we reported that an Fe-deficiency-inducible basic helix-loop-helix (bHLH) transcription factor, OsIRO2, is responsible for regulation of the genes involved in Fe homeostasis in rice. Using promoter-
GUS
transformants, we showed that
OsIRO2
is expressed throughout a plant’s lifetime in a spatially and temporally similar manner to the genes
OsNAS1
,
OsNAS2
and
TOM1
, which is involved in Fe absorption and translocation. During germination,
OsIRO2
expression was detected in embryos.
OsIRO2
expression in vegetative tissues was restricted almost exclusively to vascular bundles of roots and leaves, and to the root exodermis under Fe-sufficient conditions, and expanded to all tissues of roots and leaves in response to Fe deficiency.
OsIRO2
expression was also detected in flowers and developing seeds. Plants overexpressing
OsIRO2
grew better, and
OsIRO2
-repressed plants showed poor growth compared to non-transformant rice after germination.
OsIRO2
overexpression also resulted in improved tolerance to low Fe availability in calcareous soil. In addition to increased Fe content in shoots, the overexpression plants accumulated higher amounts of Fe in seeds than non-transformants when grown on calcareous soil. These results suggest that
OsIRO2
is synchronously expressed with genes involved in Fe homeostasis, and performs a crucial function in regulation not only of Fe uptake from soil but also Fe transport during germination and Fe translocation to grain during seed maturation.
Journal Article
Plant genes, genomes and genetics
Plant Genes, Genomes and Genetics provides a comprehensive treatment of all aspects of plant gene expression. Unique in explaining the subject from a plant perspective, it highlights the importance of key processes, many first discovered in plants, that impact how plants develop and interact with the environment. This text covers topics ranging from plant genome structure and the key control points in how genes are expressed, to the mechanisms by which proteins are generated and how their activities are controlled and altered by posttranslational modifications.
Written by a highly respected team of specialists in plant biology with extensive experience in teaching at undergraduate and graduate level, this textbook will be invaluable for students and instructors alike. Plant Genes, Genomes and Genetics also includes:
* specific examples that highlight when and how plants operate differently from other organisms
* special sections that provide in-depth discussions of particular issues
* end-of-chapter problems to help students recapitulate the main concepts
* rich, full-colour illustrations and diagrams clearly showing important processes in plant gene expression
* a companion website with PowerPoint slides, downloadable figures, and answers to the questions posed in the book
Aimed at upper level undergraduates and graduate students in plant biology, this text is equally suited for advanced agronomy and crop science students inclined to understand molecular aspects of organismal phenomena. It is also an invaluable starting point for professionals entering the field of plant biology.
eBook
Plant biochemistry
This fully revised translation of the world-renowned German edition covers the complete and modern knowledge of plant biochemistry. The book presents the topic in a concise and simplified manner so that students can digest the message and gain a basic knowledge of the entire field of plant biochemistry, from photosynthesis (the synthesis of natural plant products) to all kinds of genetic engineering with its many commercial applications. Topics include cell structure and function, lipid and polysaccharide metabolism, nitrogen fixation, phloem transport, synthesis and function of isoprenoids, phenylpropanoids and other secondary metabolites, plant growth regulation and development. Heldt provides a comprehensive description of photosynthesis, primary and secondary metabolism, the function of phytohormones and molecular engineering. The text covers research findings until the end of 2003 and identifies areas of future research. There are extensive references to the most recent scientific literature. * Illustrated with two-color diagrams and well designed metabolic schemes* Plant metabolism presented in the context of the structure and function of the plant* Many examples of commercial applications for the protection and quality improvement of harvest crops, plant breeding, and the production of raw materials for industrial use* Coverage of the latest research findings
eBook
