Relationships of net CO/sub 2/ assimilation and leaf expansion to vegetative growth in Lycospersicum esculentum, var Jubilee

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Plant Physiol.; (United States)

OSTI ID:6942483

Campbell, D E; Lyman, M; Corse, J; Hautala, E

Relationships between net plant CO/sub 2/ exchange rate (CER) and canopy development were examined in jubilee tomato over the initial 4 weeks of vegetative growth. A comparison was made between two plant groups that were alternatively exposed to 200 or 800 microeinsteins per square meter per second midday irradiation to establish a differential in net CER. Plants exposed to higher irradiation demonstrate a 2- and 4-fold greater net photosynthetic rate per leaf area and 100% average higher net CO/sub 2/ assimilation rate/plant day. However, leaf-stem growth differed by <50% suggesting a poor relationship to CER. Leaf area growth rate (LAGR) of individual leaves appeared closely related to CER during initial leaf expansion but a greater function of odor of emergence in successive leaf growth. LAGR on a per plant basis increased linearly with leaf dry weight but appeared more limited by factors determining maximum leaf enlargement and rate of new leaf development. Net CO/sub 2/ assimilation/leaf area and leaf starch consistently declined with time while net CO/sub 2/ assimilation plant/day approached a constant rate following 2 to 3 weeks growth. Composite results suggested a simple relationship for successive growth where accumulated leaf carbohydrate in excess of 200 milligrams/plant day could be expected to be partitioned to other plant segments. 30 references, 5 figures, 1 table.

• Research Organization: Dept. of Agriculture, Albany, CA
• OSTI ID: 6942483
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 80; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

550500* -- Metabolism
59 BASIC BIOLOGICAL SCIENCES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON DIOXIDE FIXATION
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
FOOD
FRUITS
GROWTH
HERBS
INFORMATION
LEAVES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANT GROWTH
PLANT STEMS
PLANTS
SYNTHESIS
TOMATOES
UPTAKE