Ranjan Swarup is a researcher in plant development, particularly auxin transport and root gravitropism. In a 2001 study, Ranjan Swarup and collaborators investigated where the auxin influx carrier AUX1 operates in Arabidopsis thaliana root tissues. Functional epitope tag versions of AUX1 restored the gravity response of an AUX1 mutant, allowing the team to localize a carrier that still performed its biological function.[ref]
Localization of the auxin permease AUX1 suggests two functionally distinct hormone transport pathways operate in the Arabidopsis root apex by Ranjan Swarup and others. Author byline and equal-contribution note; Results: functional tagged AUX1; Figure 1
A chemical rescue provides an illuminating example. At the same tested concentration, the membrane-permeable auxin analogue naphthaleneacetic acid (1-NAA) restored the mutant root gravity response and outer-tissue reporter gene expression, whereas 2,4-D did not. Combining the rescue with carrier localization linked the visible bending response to the delivery of an auxin signal to growing tissues. The paper proposed distinct inward-to-tip and outward-from-tip transport roles for AUX1, showing how the location of a membrane transport protein helps explain growth of a whole organ.[ref]
Localization of the auxin permease AUX1 suggests two functionally distinct hormone transport pathways operate in the Arabidopsis root apex by Ranjan Swarup and others. Figure 3: aux1-100 and IAA2::uidA at matched concentrations; Implications
- Localization of the auxin permease AUX1 suggests two functionally distinct hormone transport pathways operate in the Arabidopsis root apex by Ranjan Swarup and others
- Root gravitropism requires lateral root cap and epidermal cells for transport and response to a mobile auxin signal by Ranjan Swarup and others
Articles by others on the same topic
There are currently no matching articles.