Gravitropic Reaction in the Growth of Tea Roots.

Yamashita, Masataka; Takyu, Toshio; Sasa, Tetsuji

doi:10.1626/jcs.66.472

Cited by 8 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast to the above papers by the Moore group and similar to our results with Arabidopsis lateral roots, a recent study (Yamashita et al 1997) suggested a direct relationship between amyloplast sedimentation and response to gravity in lateral roots. Yamashita et al (1997) reported that lateral roots of Camellia sinenesis (tea), which lack sedimented amyloplasts in the columella cells, are not positively gravitropic.…”

Section: Gravitropism In Lateral Rootssupporting

confidence: 85%

“…Oparka et al 1995), but in this paper, we have quantified this correlation between increases in length and positive gravitropism. However, other species can exhibit a range of gravitropic behavior in their lateral roots from being agravitropic (Ransom and Moore 1983) to exhibiting plagiogravitropism (Rufelt 1962, Yamashita et al 1997.…”

Section: Gravitropism In Lateral Rootsmentioning

confidence: 99%

“…Yamashita et al (1997) reported that lateral roots of Camellia sinenesis (tea), which lack sedimented amyloplasts in the columella cells, are not positively gravitropic. In contrast, seminal roots of Camellia, which have extensive amyloplast sedimentation in the columella, do exhibit a vigorous positive gravitropism.…”

Section: Gravitropism In Lateral Rootsmentioning

confidence: 99%

“…In fact, while the response is positively orthogravitropic (i.e. oriented along the gravity vector) in primary roots, lateral roots in some species appear to be unresponsive to gravity (Ransom and Moore 1983) while in other species (Rufelt 1962, Yamashita et al 1997, there is a plagiogravitropic response (i.e. an oblique orientation relative to the gravity vector).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Phototropism and Gravitropism in Lateral Roots of Arabidopsis

Kiss

Miller

Ogden

et al. 2002

Plant and Cell Physiology

View full text Add to dashboard Cite

;Gravitropism and, to a lesser extent, phototropism have been characterized in primary roots, but little is known about structural/functional aspects of these tropisms in lateral roots. Therefore, in this study, we report on tropistic responses in lateral roots of Arabidopsis thaliana. Lateral roots initially are plagiogravitropic, but when they reach a length of approximately 10 mm, these roots grow downward and exhibit positive orthogravitropism. Light and electron microscopic studies demonstrate a correlation between positive gravitropism and development of columella cells with large, sedimented amyloplasts in wild-type plants. Lateral roots display negative phototropism in response to white and blue light and positive phototropism in response to red light. As is the case with primary roots, the photoresponse is weak relative to the graviresponse, but phototropism is readily apparent in starchless mutant plants, which are impaired in gravitropism. To our knowledge, this is the first report of phototropism of lateral roots in any plant species.

show abstract

Section: Gravitropism In Lateral Rootssupporting

confidence: 85%

Section: Gravitropism In Lateral Rootsmentioning

confidence: 99%

Section: Gravitropism In Lateral Rootsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phototropism and Gravitropism in Lateral Roots of Arabidopsis

Kiss

Miller

Ogden

et al. 2002

Plant and Cell Physiology

View full text Add to dashboard Cite

show abstract

“…resulting in a small amount of amyloplast particles in the root cap cells of the adventitious roots (Vinterhalter and Vinterhalter, 1999;Yamashita et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

Propagation Techniques and Grafting Modify the Morphological Traits of Roots and Biomass Allocation in Avocado Trees

Fassio

Cautin

Pérez-Donoso

et al. 2016

hortte

View full text Add to dashboard Cite

Root morphological traits and biomass allocation were studied in 2-year-old ‘Duke 7’ avocado (Persea americana) trees propagated using seedling and clonal techniques. The plants either were or were not grafted with the scion ‘Hass’. Whole tree excavation 1 year after planting revealed that the propagation technique affected the root growth angle of the main roots (third order roots), the root length density (defined as the total length of roots per volume of soil), and the number of first and second order roots present. The root system of clonal trees showed a typical morphology of rooted cuttings, with a crown of roots originating from a relatively short stem, resulting in a shallow root system. Clonal trees, compared with seedlings, produced main framework roots with shallower angles and more fine roots (first and second order roots) that increased the root length density (defined as the total length of roots per volume of soil). Nongrafted seedlings exhibited a main taproot and lateral roots with narrow angles that penetrated deeper into the soil and increased the aboveground biomass but had a lower root-to-shoot ratio than nongrafted clonal trees. The grafting of both clonal and seedling trees resulted in similar root architecture and revealed that grafting significantly decreased the soil volume explored and the shoot and root biomass. Although both root systems were shallow, grafted clonal trees had a higher root-to-shoot ratio than grafted seedlings. In this study, a distinct class of roots with large diameter and unbranched growth was more abundant in the root systems of clonal trees. These types of roots (previously undescribed in avocado trees), called pioneer roots, may enhance soil exploration in clonal trees.

show abstract

The relationship between profiles of plagiogravitropism and morphometry of columella cells during the development of lateral roots of Vigna angularis

Kuya

Sato

2011

Advances in Space Research

View full text Add to dashboard Cite

Gravitropic Reaction in the Growth of Tea Roots.

Cited by 8 publications

References 6 publications

Phototropism and Gravitropism in Lateral Roots of Arabidopsis

Phototropism and Gravitropism in Lateral Roots of Arabidopsis

Propagation Techniques and Grafting Modify the Morphological Traits of Roots and Biomass Allocation in Avocado Trees

The relationship between profiles of plagiogravitropism and morphometry of columella cells during the development of lateral roots of Vigna angularis

Contact Info

Product

Resources

About