The growth response in deepwater rice: Biophysical and ultrastructural investigations

Journal Article · Sat Apr 01 00:00:00 EST 1989 · Plant Physiology, Supplement; (USA)

OSTI ID:6875317

Kende, H; Kutshera, U ^[1]

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1. Michigan State Univ., East Lansing (USA)

Partial submergence induces rapid internodal elongation in deepwater rice. This response is mediated by ethylene and gibberellin and is based, in part, on enhanced cell elongation. Rapidly growing internodes exhibit increased plastic extensibility of the cell walls and tissue tension. The latter indicates that the outer epidermis is growth limiting. The ultrastructure of the cell wall/plasmalemma interface was investigated in the region where cell elongation takes place. In submerged internodes, electron-dense particles of about 100 nm diameter were found at the outer epidermal cell wall but not at the inner epidermal wall at the inner epidermal walls or the walls of interior cells. They were also not detected at the outer epidermal walls of air-grown internodes. We suggest that these particles are related to growth of the outer epidermis.

• OSTI ID: 6875317
• Journal Information: Plant Physiology, Supplement; (USA), Vol. 89:4; ISSN 0079-2241
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
CELL WALL
ULTRASTRUCTURAL CHANGES
ETHYLENE
BIOCHEMICAL REACTION KINETICS
GIBBERELLIC ACID
RICE
PLANT GROWTH
ELONGATION
ALKENES
CARBOXYLIC ACIDS
CELL CONSTITUENTS
CEREALS
ESTERS
GRASS
GROWTH
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROXY ACIDS
KINETICS
LACTONES
LILIOPSIDA
MAGNOLIOPHYTA
MORPHOLOGICAL CHANGES
ORGANIC ACIDS
ORGANIC COMPOUNDS
PLANTS
REACTION KINETICS
550200* - Biochemistry
550300 - Cytology