Genetic analysis of root development

Schiefelbein, John; Ford, Susan K.; Galway, Moira E.

doi:10.1006/sedb.1993.1004

Cited by 6 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on our current understanding of tip growth, the TlPl product may be involved in any one of several processes, including the control of Ca2+ levels within the cell, the coordination of the actin filament arrays, or the synthesis of specific cell wall components. The further biochemical and cellular characterization of TlPl should enhance our understanding of tip growth in plants and contribute to the use of root-hair development as a model for studies of plant cell morphogenesis (Schiefelbein et al, 1993).…”

Section: Discussionmentioning

confidence: 99%

Pollen Tube and Root-Hair Tip Growth Is Disrupted in a Mutant of Arabidopsis thaliana

et al. 1993

View full text Add to dashboard Cite

l h e expansion of both root hairs and pollen tubes occurs by a process known as tip growth. In this report, an Arabidopsis thaliana mutant ( t i p l ) is described that displays defects in both root-hair and pollen-tube growth. l h e root hairs of the fipl mutant plants are shorter than those of the wild-type plants and branched at their base. l h e tipl pollen-tube growth defect was identified by the aberrant segregation ratio of phenotypically normal to mutant seeds in siliques from self-pollinated, heterozygous plants. Homozygous mutant seeds are not randomly distributed in the siliques, comprising only 14.4% of the total seeds, 5.3% of the seeds from the bottom half, and 2.2% of the seeds from the bottom quarter of the heterozygous siliques. Studies of pollen-tube growth in vivo showed that mutant pollen tubes grow more slowly than wild-type pollen through the transmitting tissue of wild-type flowers. Cosegregation studies indicate that the root-hair and pollen-tube defects are caused by the same genetic lesion. Based on these findings, the TlPl gene is likely to encode a product involved in a fundamental aspect of tip growth in plant cells.

show abstract

Section: Discussionmentioning

confidence: 99%

Pollen Tube and Root-Hair Tip Growth Is Disrupted in a Mutant of Arabidopsis thaliana

et al. 1993

View full text Add to dashboard Cite

show abstract

“…Root hair length is highly regulated by external P bioavailability. Root hair initiation and elongation are both induced by low-P stress, and those morphological traits are controlled by genetic factors [12,19,24]. Previous studies have shown that root hair length of barley ('Pallas' and 'Optic') increased from 0.68 ± 0.14 mm in soil with a high (e.g., 10 µM) P to 0.80 ± 0.20 mm in soil with low (e.g., 3 µM) P [10,14].…”

Section: Effect Of P Bioavailability On Root Hair Length and Densitymentioning

confidence: 99%

Phosphorus Uptake and Growth of Wild-Type Barley and Its Root-Hairless Mutant Cultured in Buffered-and Non-Buffered-P Solutions

et al. 2020

View full text Add to dashboard Cite

Root hairs play an important role in phosphorus (P) nutrition of plants. To better understand the relationship between root hairs and P acquisition efficiency (PAE) in barley, experiments were conducted with the wild-type barley (cv. ’Pallas’) and its root-hairless mutant (brb). A hydroponic split-root system was used to supply P as Ca3(PO4)2 (tri-calcium phosphate, TCP) to one-half and other nutrients to the other half of the root system. Using TCP as a sole P source can simulate a soil solution with buffered low P concentration in hydroponics to induce prolific root hair growth. Root morphology, plant growth, and P uptake efficiency were measured with 50 mg L−1 TCP supplied to the roots in the split-root system and 0, 35, or 1000 μM NaH2PO4 in a non-split-root hydroponic system. The wild-type plants developed root hairs, but they did not contribute to the significant genotypic differences in the P uptake rate when a soluble P source was supplied in the non-split root system, indicating that root hair formation does not contribute to P uptake in a non-split root solution. On the other hand, when grown in a split-root system with one-half of the roots supplied with TCP, the wild-type showed 1.25-fold greater P uptake than the root hairless mutant. This study provides evidence that root hairs play an essential role in plant P uptake when P bioavailability is limited in the root zone.

show abstract

“…It is now possible for us to begin to determine whether the mechanisms and macromolecules implicated in polarity establishment and polar growth in Fucus are also involved in asymmetrical cell processes in flowering plants. Some of these asymmetric processes occur during the earliest stages of embryogenesis and others occur later in development in pollen tubes and root hairs (Heath, 1990;Schiefelbein et al, 1993). In these cases, as in Fucus, the actin cytoskeleton has been found to be localized to the region of polar growth and has been implicated in vesicle transport to the growing tip.…”

Section: Applications To Polarity In Flowering Plantsmentioning

confidence: 99%