The quiescent center and primary vascular tissue pattern formation in cultured roots of <i>Zea</i>

Feldman, Lewis J.; Torrey, John G.

doi:10.1139/b75-307

Cited by 50 publications

(14 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4, B-E). It has been shown previously that growth in the presence of Suc affects the size of the quiescent center (Feldman and Torrey, 1975). Addition of Suc improved primary root growth in brush in a dose-dependent manner (Fig.…”

Section: The Brush Phenotype Differs From That Of Previously Describementioning

confidence: 59%

The Temperature-Sensitive brush Mutant of the Legume Lotus japonicus Reveals a Link between Root Development and Nodule Infection by Rhizobia

et al. 2009

View full text Add to dashboard Cite

(S.S., S.T.); and John Innes Centre, Norwich NR4 7UH, United Kingdom (J.P., T.L.W.)The brush mutant of Lotus japonicus exhibits a temperature-dependent impairment in nodule, root, and shoot development. At 26°C, brush formed fewer nodules, most of which were not colonized by rhizobia bacteria. Primary root growth was retarded and the anatomy of the brush root apical meristem revealed distorted cellular organization and reduced cell expansion. Reciprocal grafting of brush with wild-type plants indicated that this genotype only affected the root and that the shoot phenotype was a secondary effect. The root and nodulation phenotype cosegregated as a single Mendelian trait and the BRUSH gene could be mapped to the short arm of chromosome 2. At 18°C, the brush root anatomy was rescued and similar to the wild type, and primary root length, number of infection threads, and nodule formation were partially rescued. Superficially, the brush root phenotype resembled the ethylene-related thick short root syndrome. However, treatment with ethylene inhibitor did not recover the observed phenotypes, although brush primary roots were slightly longer. The defects of brush in root architecture and infection thread development, together with intact nodule architecture and complete absence of symptoms from shoots, suggest that BRUSH affects cellular differentiation in a tissue-dependent way.

show abstract

Section: The Brush Phenotype Differs From That Of Previously Describementioning

confidence: 59%

The Temperature-Sensitive brush Mutant of the Legume Lotus japonicus Reveals a Link between Root Development and Nodule Infection by Rhizobia

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Carbohydrate starvation decreases mitotic activity and root becomes thinner (Feldman & Torrey, 1975).…”

Section: mentioning

confidence: 99%

Apical meristems of tomato roots and their modifications induced by arbuscular mycorrhizal and soilborne pathogenic fungi

et al. 1999

View full text Add to dashboard Cite

Functional morphological patterns in root apices of tomato (Lycopersicon esculentum) dependent on growth, ageing and infection by the arbuscular mycorrhizal (AM) fungus Glomus mosseae and\or by the soilborne pathogenic fungus Phytophthora nicotianae var parasitica (P. parasitica) were studied. Uninfected root apices were characterized by closed, tri-layered meristems with nonreticulate nuclei ; however, some apices of each treatment lost their meristematic nature, stopped growing and differentiated, becoming ' parenchymatized '. The pathogenic fungus reduced the apex diameter and the number of mitotically active and viable apices inducing plasmolysis, cell and nucleus degeneration, and necrosis. The AM fungus, on the other hand, produced an increase in apex size and reduced the percentage of necrosis both in uninfected roots and in roots infected by P. parasitica. Thus, the AM fungus protected the apices from the pathogenic infection, allowing normal root growth. Furthermore, larger apices, which produce thicker roots, might indirectly contribute to plant protection. Increased volumes of colonizable tissues favour the spreading of the symbiont, and P. parasitica hyphae are always excluded from arbuscule-containing cells.

show abstract

“…In the latter the length distributions of subunits of metaxylem files, i.e. of log(p,/p,) of presumed vessels, and the way in which metaxylem files shift from cell file to cell file show that more subunits may be added to these "ends" within the QC as growth goes on, and more metaxylem subunits cannot arise by a sort of intercalary meristematic activity in what Feldmanand Torrey (1975) call the "proximal meristem" proximal to the QC boundary. Furthermore, it is possible to get an estimate of the rate of addition of subunits, which is equivalent to the length of cell cycle in prospective metaxylem cells in that region of the QC.…”

Section: Discussionmentioning

confidence: 93%

“…In roots such as those of grasses with a shorter extending region this point could be proportionately nearer the RCJ. Microsurgical methods for root tips have not developed to the point where predictable operations can be pelformed to the degree of accuracy required, with the exception of the QC removal technique of Feldman and Torrey (1976). Feldman (1976) described the regeneration of root tips after QC removal but not the vascular patterns produced.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Primary vascular patterns in root meristems of Pontederia cordata and their relevance to studies of root development

Charlton¹

1980

Can. J. Bot.

View full text Add to dashboard Cite

There are several files of metaxylem cells in root apices of Pontederia cordata L., each considered to consist of a series of prospective vessels with their ends in contact. Two longitudinally adjacent vessels may be in the same file of cells produced by the root apex or in adjacent files. As the root grows, successive prospective vessels are added to the apical ends of most of the files but not all files are continued. Addition of prospective vessels appears to take place within the "quiescent centre" of the root apical meristem. Where files are not continued there is no immediate readjustment of remaining files. The longitudinal and transverse distribution of components of the vascular system (including protophloem and protoxylem) is discussed in relation to the means by which the pattern of development may be controlled. Rates of production of vessels and the final lengths of the vessels are estimated. The observations and deductions are discussed in relation to other studies of root growth, vascular differentiation, and vascular pattern formation and maintenance.

show abstract

The quiescent center and primary vascular tissue pattern formation in cultured roots of Zea

Cited by 50 publications

References 21 publications

The Temperature-Sensitive brush Mutant of the Legume Lotus japonicus Reveals a Link between Root Development and Nodule Infection by Rhizobia

The Temperature-Sensitive brush Mutant of the Legume Lotus japonicus Reveals a Link between Root Development and Nodule Infection by Rhizobia

Apical meristems of tomato roots and their modifications induced by arbuscular mycorrhizal and soilborne pathogenic fungi

Primary vascular patterns in root meristems of Pontederia cordata and their relevance to studies of root development

Contact Info

Product

Resources

About