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Article Addendum

How Arabidopsis Roots Differentiate Hydrotropism from Gravitropism?

Yutaka Miyazawa and Hideyuki Takahashi

volume 2 | issue 5

september/october
Pages: 388 - 389

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Root hydrotropism is a response to moisture gradients considered to be important for drought avoidance. Recent re-evaluation of root hydrotropism has emphasised the dominating effect of root gravitropism on it. It has been suggested that amyloplast dynamics inside columella cells and auxin regulation play roles in this interacting mechanism, even though the existence of distinct pathways of two tropisms derived from different stimuli remained unclear. We have recently found two factors that separate the mechanism of hydrotropism from that of gravitropism in Arabidopsis seedling roots. One is the difference in the mode of auxin-mediated growth regulation between two tropisms, and the other is the identification of gene indispensable only for root hydrotropism. Here we summarize the recent progress on root hydrotropism research and discuss the remaining and emerging issues.

Authors

Yutaka Miyazawa

Tohoku University; Sendai, Japan

Hideyuki Takahashi

Iwate Biotechnology Research Center

We now provide open access to journal articles published online for one year or more. This article may be downloaded at the following link: