Phototropism and Gravitropism in Lateral Roots of Arabidopsis
نویسندگان
چکیده
منابع مشابه
Interaction of root gravitropism and phototropism in Arabidopsis wild-type and starchless mutants.
Root gravitropism in wild-type Arabidopsis and in two starchless mutants, pgm1-1 and adg1-1, was evaluated as a function of light position to determine the relative strengths of negative phototropism and of gravitropism and how much phototropism affects gravitropic measurements. Gravitropism was stronger than phototropism in some but not all light positions in wild-type roots grown for an exten...
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The interaction between gravitropism and phototropism was analyzed for sporangiophores of Phycomyces blakesleeanus. Fluence rate-response curves for phototropism were generated under three different conditions: (a) for stationary sporangiophores, which reached photogravitropic equilibrium; (b) for sporangiophores, which were clinostated head-over during phototropic stimulation; and (c) for spor...
متن کاملHydrotropism interacts with gravitropism by degrading amyloplasts in seedling roots of Arabidopsis and radish.
In response to a moisture gradient, roots exhibit hydrotropism to control the orientation of their growth. To exhibit hydrotropism, however, they must overcome the gravitropism that is dominant on Earth. We found that moisture gradient or water stress caused immediate degradation of the starch anchors, amyloplasts, in root columella cells of Arabidopsis and radish (Raphanus sativus). Namely, de...
متن کاملOrganization and cell differentiation in lateral roots of Arabidopsis thaliana.
Lateral root formation in plants involves the stimulation of mature pericycle cells to proliferate and redifferentiate to create a new organ. The simple organization of the root of Arabidopsis thaliana allows the development of lateral root primordia to be characterized histologically. We have divided the process of lateral root development into 8 stages defined by specific anatomical character...
متن کاملBasipetal auxin transport is required for gravitropism in roots of Arabidopsis.
Auxin transport has been reported to occur in two distinct polarities, acropetally and basipetally, in two different root tissues. The goals of this study were to determine whether both polarities of indole-3-acetic acid (IAA) transport occur in roots of Arabidopsis and to determine which polarity controls the gravity response. Global application of the auxin transport inhibitor naphthylphthala...
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ژورنال
عنوان ژورنال: Plant and Cell Physiology
سال: 2002
ISSN: 1471-9053,0032-0781
DOI: 10.1093/pcp/pcf017