Nutrient influences on leaf photosynthesis

Journal Article · Tue Jan 01 00:00:00 EST 1980 · Plant Physiol.; (United States)

OSTI ID:6539393

Longstreth, D J; Nobel, P S

The net rate of CO/sub 2/ uptake for leaves of Gossypium hirsutum L. was reduced when the plants were grown at low concentrations of NO/sub 3//sup -/, PO/sub 4//sup 2 -/, or K/sup +/. The water vapor conductance was relatively constant for all nutrient levels, indicating little effect on stomatal response. Although leaves under nutrient stress tended to be lower in chlorophyll and thinner, the ratio of mesophyll surface area to leaf area did not change appreciably. Thus, the reduction in CO/sub 2/ uptake rate at low nutrient levels was due to a decrease in the CO/sub 2/ conductance expressed per unit mesophyll cell wall area (g/sub CO/sup cell//sub 2/). The use of g/sub CO//sup cell//sub 2/ and nutrient levels expressed per unit of mesophyll cell wall provides a new means of assessing nutrient effects on CO/sub 2/ uptake of leaves. 14 figures, 1 table.

• Research Organization: Univ. of California, Los Angeles
• OSTI ID: 6539393
• Journal Information: Plant Physiol.; (United States), Vol. 65
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
09 BIOMASS FUELS
CARBON DIOXIDE
FOLIAR UPTAKE
LEAVES
PHOTOSYNTHESIS
CELL WALL
CHLOROPHYLL
COTTON
NITRATES
NUTRIENTS
PHOSPHATES
POTASSIUM IONS
STOMATA
WATER VAPOR
CARBON COMPOUNDS
CARBON OXIDES
CARBOXYLIC ACIDS
CELL CONSTITUENTS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
FLUIDS
GASES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
IONS
NITROGEN COMPOUNDS
OPENINGS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHYTOCHROMES
PIGMENTS
PORPHYRINS
SYNTHESIS
UPTAKE
VAPORS
550500* - Metabolism
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)