Lignification in rapidly elongating internodes of deep water rice as a limiting factor in growth

Conference · Tue May 01 00:00:00 EDT 1990 · Plant Physiology, Supplement; (USA)

OSTI ID:5841738

Sauter, M; Kende, H ^[1]

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

Internodes of deep water rice are induced to elongate rapidly by partial submergence, or by treatment with ethylene or gibberellin. This growth response is based, in part, on enhanced cell elongation and an increase in the size of the internodal growing zone. For this to occur, processes that limit growth, e.g. lignification, must be delayed. We examined the activity and distribution of two enzymes of the lignin biosynthetic pathway, phenylalanine ammonia-lyase (PAL) and coniferylalcohol dehydrogenase (CAD) in rapidly growing and control internodes. CAD activity decreased in the rapidly growing region of submerged or gibberellin-treated internodes to about 25% of the activity found in air-grown control internodes. No comparable change in CAD activity was observed in the older, non-growing portions of the internodes. PAL activity changed in similar fashion upon induction of rapid growth.

• OSTI ID: 5841738
• Report Number(s): CONF-9007196-; CODEN: PPYSA
• Journal Information: Plant Physiology, Supplement; (USA), Vol. 93:1; Conference: Annual meeting of the American Society of Plant Physiologists, Indianapolis, IN (USA), 29 Jul - 2 Aug 1990; ISSN 0079-2241
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
ETHYLENE
BIOLOGICAL EFFECTS
LYASES
BIOSYNTHESIS
OXIDOREDUCTASES
GIBBERELLIC ACID
LIGNIN
RICE
ALKENES
CARBOHYDRATES
CARBOXYLIC ACIDS
CEREALS
ENZYMES
ESTERS
GRAMINEAE
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROXY ACIDS
LACTONES
LILIOPSIDA
MAGNOLIOPHYTA
ORGANIC ACIDS
ORGANIC COMPOUNDS
PLANTS
POLYSACCHARIDES
SACCHARIDES
SYNTHESIS
550200* - Biochemistry