Influence of elevated CO{sub 2} on leaf starch of field-grown cotton

Journal Article · Thu Dec 31 04:00:00 EST 1992 · CRC Critical Reviews in Plant Sciences

DOI:https://doi.org/10.1080/07352689209382342· OSTI ID:54363

Hendrix, D L ^[1]

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1. Western Cotton Lab., Phoenix, AZ (United States)

Experiments were conducted to determine the effects of free-air carbon dioxide enrichment (FACE) upon cotton grown in fields near Yazoo City, MS and Maricopa, AZ. Among the measured responses was the starch content of cotton leaves. Leaf starch is an important carbon pool in cotton, since its degradation during the night and subsequent translocation of the products from the leaf is the major process supplying substrates for energy necessary for nocturnal growth and metabolism in this species. The nocturnal carbon supply is of particular importance in cotton as it provides the energy for a number of significant growth events which occur during dark periods, including flowering, fruit set and leaf growth. Earlier work has shown that the magnitude of cotton leaf carbon export during dark periods could be established by comparing the starch content in leaf samples collected from the same leaf at dusk and dawn. The difference between evening and morning leaf starch content equals the nocturnal contribution of carbon from that particular leaf to the growth and respiration of the plant. Moreover, the cotton growth model COTCO2 accounts for such diurnal changes in the starch pool and observations of actual leaf starch content can provide data with which to validate this aspect of the model. 6 refs., 3 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 54363
• Journal Information: CRC Critical Reviews in Plant Sciences, Journal Name: CRC Critical Reviews in Plant Sciences Journal Issue: 2/3 Vol. 11; ISSN 0735-2689; ISSN CRPSD3
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
55 BIOLOGY AND MEDICINE
BASIC STUDIES
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
BIOLOGICAL EFFECTS
CARBON DIOXIDE
CLIMATIC CHANGE
COTTON
CROPS
DAILY VARIATIONS
ECOLOGICAL CONCENTRATION
ENRICHMENT
LEAVES
METABOLISM
PLANT GROWTH
STARCH