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Localization and transport of indole-3-acetic acid during somatic embryogenesis in Coffea canephora
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Localization and transport of indole-3-acetic acid during somatic embryogenesis in Coffea canephora
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Localization and transport of indole-3-acetic acid during somatic embryogenesis in Coffea canephora
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Journal Article
Localization and transport of indole-3-acetic acid during somatic embryogenesis in Coffea canephora
2018
Overview
Auxin and polar auxin transport have been implicated in controlling zygotic embryo development, but less is known about their role in the development of somatic embryos. The aim of this study was to determine if indole-3-acetic acid (IAA) and the PIN1 transporter participate in the induction of somatic embryogenesis (SE) and the development of somatic embryos. The results show that IAA levels gradually increase during pre-treatment and accumulate in the chloroplast. During pre-treatment and the globular stage of SE in C. canephora, auxin is distributed uniformly in all of the cells of the somatic embryo. During the subsequent stages of development, auxins are mobilized to the cells that will form the cotyledons and the root meristem. The location of the PIN transporters shifts from the plasmalemma of the protoderm cells during the globular stage to the plasmalemma of the cells that will give rise to the cotyledons and the vascular tissue in the late stages of somatic embryogenesis. The incubation of the explants in the presence of 2,3,5-triiodobenzoic acid (TIBA) produced aberrant somatic embryos, suggesting that PIN1 mediates the transport of IAA.
Publisher
Springer Nature B.V
Subject
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