Auxin Transport in the Elongation Zone of Vicia Roots
نویسندگان
چکیده
منابع مشابه
Multiscale modelling of auxin transport in the plant-root elongation zone.
In the root elongation zone of a plant, the hormone auxin moves in a polar manner due to active transport facilitated by spatially distributed influx and efflux carriers present on the cell membranes. To understand how the cell-scale active transport and passive diffusion combine to produce the effective tissue-scale flux, we apply asymptotic methods to a cell-based model of auxin transport to ...
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We used a video digitizer system to (a) measure changes in the pattern of longitudinal surface extension in primary roots of maize (Zea mays L.) upon application and withdrawal of auxin and (b) compare these patterns during gravitropism in control roots and roots pretreated with auxin. Special attention was paid to the distal elongation zone (DEZ), arbitrarily defined as the region between the ...
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The lateral movement of auixin has been stuidied with bioassays and also by application of '4C-IAA. Both techniqutes have demonstrated that the tupper hal,f of a horizontally positioned stem or root contains at least 30 to 45 % of the total auxin present in the tissuie (2). However, such an auxin gradient is difficult to reconcile with the Cholodny-WVent theory of root geotropism becatuse it is...
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As soon as a seed germinates, plant growth relates to gravity to ensure that the root penetrates the soil and the shoot expands aerially. Whereas mechanisms of positive and negative orthogravitropism of primary roots and shoots are relatively well understood, lateral organs often show more complex growth behavior. Lateral roots (LRs) seemingly suppress positive gravitropic growth and show a def...
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ژورنال
عنوان ژورنال: Shokubutsugaku Zasshi
سال: 1968
ISSN: 0006-808X
DOI: 10.15281/jplantres1887.81.44