The pathway of auxin biosynthesis in plants
Yoshihiro Mano,Keiichirou Nemoto +1 more
TLDR
The genes now known to be involved in auxin biosynthesis are summarized and the major IAA biosynthetic pathway distributed widely in the plant kingdom is discussed on the basis of biochemical and molecular biological findings and bioinformatics studies.Abstract:
The plant hormone auxin, which is predominantly represented by indole-3-acetic acid (IAA), is involved in the regulation of plant growth and development. Although IAA was the first plant hormone identified, the biosynthetic pathway at the genetic level has remained unclear. Two major pathways for IAA biosynthesis have been proposed: the tryptophan (Trp)-independent and Trp-dependent pathways. In Trp-dependent IAA biosynthesis, four pathways have been postulated in plants: (i) the indole-3-acetamide (IAM) pathway; (ii) the indole-3-pyruvic acid (IPA) pathway; (iii) the tryptamine (TAM) pathway; and (iv) the indole-3-acetaldoxime (IAOX) pathway. Although different plant species may have unique strategies and modifications to optimize their metabolic pathways, plants would be expected to share evolutionarily conserved core mechanisms for auxin biosynthesis because IAA is a fundamental substance in the plant life cycle. In this review, the genes now known to be involved in auxin biosynthesis are summarized and the major IAA biosynthetic pathway distributed widely in the plant kingdom is discussed on the basis of biochemical and molecular biological findings and bioinformatics studies. Based on evolutionarily conserved core mechanisms, it is thought that the pathway via IAM or IPA is the major route(s) to IAA in plants.read more
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Phytohormones and their metabolic engineering for abiotic stress tolerance in crop plants
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Auxin metabolism and homeostasis during plant development.
TL;DR: Recent discoveries have started to shed light on the processes that regulate the synthesis and degradation of this important plant hormone Auxin.
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An integrated analysis of plant and bacterial gene expression in symbiotic root nodules using laser‐capture microdissection coupled to RNA sequencing
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TL;DR: This study, focused on the association between the model legume Medicago truncatula and its symbiont Sinorhizobium meliloti, led to the production of 942 million sequencing read pairs that were unambiguously mapped on plant and bacterial genomes.
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TL;DR: An overview of Cd status in soil and its toxicity in plants and major PGRs are introduced, mechanisms potentially involved in PGR-mediated enhanced plant tolerance to Cd are appraised and key aspects so far unexplored in the subject area are highlighted.
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Journal ArticleDOI
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Journal ArticleDOI
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C L Patten,Bernard R. Glick +1 more
TL;DR: It is suggested that bacterial IAA plays a major role in the development of the host plant root system.
Book ChapterDOI
Tobacco BY-2 Cell Line as the “HeLa” Cell in the Cell Biology of Higher Plants
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