Auxin biosynthesis: spatial regulation and adaptation to stress.
J Exp Bot
; 70(19): 5041-5049, 2019 10 15.
Article
em En
| MEDLINE
| ID: mdl-31198972
ABSTRACT
The plant hormone auxin is essential for plant growth and development, controlling both organ development and overall plant architecture. Auxin homeostasis is regulated by coordination of biosynthesis, transport, conjugation, sequestration/storage, and catabolism to optimize concentration-dependent growth responses and adaptive responses to temperature, water stress, herbivory, and pathogens. At present, the best defined pathway of auxin biosynthesis is the TAA/YUC route, in which the tryptophan aminotransferases TAA and TAR and YUCCA flavin-dependent monooxygenases produce the auxin indole-3-acetic acid from tryptophan. This review highlights recent advances in our knowledge of TAA/YUC-dependent auxin biosynthesis focusing on membrane localization of auxin biosynthetic enzymes, differential regulation in root and shoot tissue, and auxin biosynthesis during abiotic stress.
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MEDLINE
Assunto principal:
Reguladores de Crescimento de Plantas
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Proteínas de Plantas
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Plantas
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Adaptação Fisiológica
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Aclimatação
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Ácidos Indolacéticos
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article