Cytological and ultrastructural studies on root tissues.

R. D. Slocum, John Gaynor, A. W. Galston

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)

Abstract

The anatomy and fine structure of roots from oat and mung bean seedlings, grown under microgravity conditions for 8 days aboard the Space Shuttle, was examined and compared to that of roots from ground control plants grown under similar conditions. Roots from both sets of oat seedlings exhibited characteristic monocotyledonous tissue organization and normal ultrastructural features, except for cortex cell mitochondria, which exhibited a 'swollen' morphology. Various stages of cell division were observed in the meristematic tissues of oat roots. Ground control and flight-grown mung bean roots also showed normal tissue organization, but root cap cells in the flight-grown roots were collapsed and degraded in appearance, especially at the cap periphery. At the ultrastructural level, these cells exhibited a loss of organelle integrity and a highly-condensed cytoplasm. This latter observation perhaps suggests a differing tissue sensitivity for the two species to growth conditions employed in space flight. The basis for abnormal root cap cell development is not understood, but the loss of these putative gravity-sensing cells holds potential significance for long term plant growth orientation during space flight.

Original languageEnglish
Pages (from-to)65-76
Number of pages12
JournalAnnals of botany
Volume54
Issue numberSuppl 3
StatePublished - 1 Nov 1984

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oats
space flight
root cap
mung beans
cells
flight
microgravity
seedlings
gravity
organelles
tissues
cell division
cortex
mitochondria
cytoplasm
plant growth

Cite this

Slocum, R. D., Gaynor, J., & Galston, A. W. (1984). Cytological and ultrastructural studies on root tissues. Annals of botany, 54(Suppl 3), 65-76.
Slocum, R. D. ; Gaynor, John ; Galston, A. W. / Cytological and ultrastructural studies on root tissues. In: Annals of botany. 1984 ; Vol. 54, No. Suppl 3. pp. 65-76.
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Slocum, RD, Gaynor, J & Galston, AW 1984, 'Cytological and ultrastructural studies on root tissues.', Annals of botany, vol. 54, no. Suppl 3, pp. 65-76.

Cytological and ultrastructural studies on root tissues. / Slocum, R. D.; Gaynor, John; Galston, A. W.

In: Annals of botany, Vol. 54, No. Suppl 3, 01.11.1984, p. 65-76.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Galston, A. W.

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Slocum RD, Gaynor J, Galston AW. Cytological and ultrastructural studies on root tissues. Annals of botany. 1984 Nov 1;54(Suppl 3):65-76.