Contribution of the IAM Pathway to IAA Pool in Developing Rice Grains

Abu-Zaitoon, Yousef M.; Aladaileh, Saleem; Tawaha, Abdel Rahman Al

doi:10.1590/1678-4324-2016150677

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Auxin Biosynthesis1

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2017

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“…Homologs of AMI have been identified in other plant species including the monocot rice and algae, suggesting that this auxin biosynthesis route is evolutionary conserved [ 104 , 105 , 106 ]. AMI1 homologs can convert phenyl-2-acetamide (PAM) into PAA, giving an explanation for the occurrence of auxinic molecules other than IAA in plants [ 107 ].…”

Section: Auxin Biosynthesismentioning

confidence: 99%

Control of Endogenous Auxin Levels in Plant Root Development

Olatunji

Geelen

Verstraeten

2017

IJMS

139

100

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In this review, we summarize the different biosynthesis-related pathways that contribute to the regulation of endogenous auxin in plants. We demonstrate that all known genes involved in auxin biosynthesis also have a role in root formation, from the initiation of a root meristem during embryogenesis to the generation of a functional root system with a primary root, secondary lateral root branches and adventitious roots. Furthermore, the versatile adaptation of root development in response to environmental challenges is mediated by both local and distant control of auxin biosynthesis. In conclusion, auxin homeostasis mediated by spatial and temporal regulation of auxin biosynthesis plays a central role in determining root architecture.

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