Reversibility of photosynthetic inhibition in cotton after long-term exposure to elevated CO2 concentrations

Thomas W. Sasek, Evan H. Delucia, Boyd R. Strain

Research output: Contribution to journalArticle

Abstract

Cotton (Gossypium hirsutum L. cv Stoneville 213) was grown at 350 and 1000 microliters per liter CO2. The plants grown at elevated CO2 concentrations contained large starch pools and showed initial symptoms of visible physical damage. Photosynthetic rates were lower than expected based on instantaneous exposure to high CO2. A group of plants grown at 1000 microliters per liter CO2 was switched to 350 microliters per liter CO2. Starch pools and photosynthetic rates were monitored in the switched plants and in the two unswitched control groups. Photosynthetic rates per unit leaf area recovered to the level of the 350 microliters per liter CO2 grown control group within four to five days. To assess only nonstomatal limitations to photosynthesis, a measure of photosynthetic efficiencies was calculated (moles CO2 fixed per square meter per second per mole intercellular CO2). Photosynthetic efficiency also recovered to the levels of the 350 microliters per liter CO2 grown controls within three to four days. Recovery was correlated to a rapid depletion of the starch pool, indicating that the inhibition of photosynthesis is primarily a result of feedback inhibition. However, complete recovery may involve the repair of damage to the chloroplasts caused by excessive starch accumulation. The rapid and complete reversal of photosynthetic inhibition suggests that the appearance of large, strong sinks at certain developmental stages could result in reduction of the large starch accumulations and that photosynthetic rates could recover to near the theoretical capacity during periods of high photosynthate demand.

Original languageEnglish (US)
Pages (from-to)619-622
Number of pages4
JournalPlant physiology
Volume78
Issue number3
DOIs
StatePublished - Jul 1985
Externally publishedYes

Fingerprint

chronic exposure
Starch
cotton
starch
Photosynthesis
photosynthesis
Gossypium
Control Groups
photosynthates
Chloroplasts
Gossypium hirsutum
signs and symptoms (plants)
leaf area
chloroplasts
developmental stages

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science

Cite this

Reversibility of photosynthetic inhibition in cotton after long-term exposure to elevated CO2 concentrations. / Sasek, Thomas W.; Delucia, Evan H.; Strain, Boyd R.

In: Plant physiology, Vol. 78, No. 3, 07.1985, p. 619-622.

Research output: Contribution to journalArticle

@article{c74084d506244a3094a2c5860f290708,
title = "Reversibility of photosynthetic inhibition in cotton after long-term exposure to elevated CO2 concentrations",
abstract = "Cotton (Gossypium hirsutum L. cv Stoneville 213) was grown at 350 and 1000 microliters per liter CO2. The plants grown at elevated CO2 concentrations contained large starch pools and showed initial symptoms of visible physical damage. Photosynthetic rates were lower than expected based on instantaneous exposure to high CO2. A group of plants grown at 1000 microliters per liter CO2 was switched to 350 microliters per liter CO2. Starch pools and photosynthetic rates were monitored in the switched plants and in the two unswitched control groups. Photosynthetic rates per unit leaf area recovered to the level of the 350 microliters per liter CO2 grown control group within four to five days. To assess only nonstomatal limitations to photosynthesis, a measure of photosynthetic efficiencies was calculated (moles CO2 fixed per square meter per second per mole intercellular CO2). Photosynthetic efficiency also recovered to the levels of the 350 microliters per liter CO2 grown controls within three to four days. Recovery was correlated to a rapid depletion of the starch pool, indicating that the inhibition of photosynthesis is primarily a result of feedback inhibition. However, complete recovery may involve the repair of damage to the chloroplasts caused by excessive starch accumulation. The rapid and complete reversal of photosynthetic inhibition suggests that the appearance of large, strong sinks at certain developmental stages could result in reduction of the large starch accumulations and that photosynthetic rates could recover to near the theoretical capacity during periods of high photosynthate demand.",
author = "Sasek, {Thomas W.} and Delucia, {Evan H.} and Strain, {Boyd R.}",
year = "1985",
month = "7",
doi = "10.1104/pp.78.3.619",
language = "English (US)",
volume = "78",
pages = "619--622",
journal = "Plant Physiology",
issn = "0032-0889",
publisher = "American Society of Plant Biologists",
number = "3",

}

TY - JOUR

T1 - Reversibility of photosynthetic inhibition in cotton after long-term exposure to elevated CO2 concentrations

AU - Sasek, Thomas W.

AU - Delucia, Evan H.

AU - Strain, Boyd R.

PY - 1985/7

Y1 - 1985/7

N2 - Cotton (Gossypium hirsutum L. cv Stoneville 213) was grown at 350 and 1000 microliters per liter CO2. The plants grown at elevated CO2 concentrations contained large starch pools and showed initial symptoms of visible physical damage. Photosynthetic rates were lower than expected based on instantaneous exposure to high CO2. A group of plants grown at 1000 microliters per liter CO2 was switched to 350 microliters per liter CO2. Starch pools and photosynthetic rates were monitored in the switched plants and in the two unswitched control groups. Photosynthetic rates per unit leaf area recovered to the level of the 350 microliters per liter CO2 grown control group within four to five days. To assess only nonstomatal limitations to photosynthesis, a measure of photosynthetic efficiencies was calculated (moles CO2 fixed per square meter per second per mole intercellular CO2). Photosynthetic efficiency also recovered to the levels of the 350 microliters per liter CO2 grown controls within three to four days. Recovery was correlated to a rapid depletion of the starch pool, indicating that the inhibition of photosynthesis is primarily a result of feedback inhibition. However, complete recovery may involve the repair of damage to the chloroplasts caused by excessive starch accumulation. The rapid and complete reversal of photosynthetic inhibition suggests that the appearance of large, strong sinks at certain developmental stages could result in reduction of the large starch accumulations and that photosynthetic rates could recover to near the theoretical capacity during periods of high photosynthate demand.

AB - Cotton (Gossypium hirsutum L. cv Stoneville 213) was grown at 350 and 1000 microliters per liter CO2. The plants grown at elevated CO2 concentrations contained large starch pools and showed initial symptoms of visible physical damage. Photosynthetic rates were lower than expected based on instantaneous exposure to high CO2. A group of plants grown at 1000 microliters per liter CO2 was switched to 350 microliters per liter CO2. Starch pools and photosynthetic rates were monitored in the switched plants and in the two unswitched control groups. Photosynthetic rates per unit leaf area recovered to the level of the 350 microliters per liter CO2 grown control group within four to five days. To assess only nonstomatal limitations to photosynthesis, a measure of photosynthetic efficiencies was calculated (moles CO2 fixed per square meter per second per mole intercellular CO2). Photosynthetic efficiency also recovered to the levels of the 350 microliters per liter CO2 grown controls within three to four days. Recovery was correlated to a rapid depletion of the starch pool, indicating that the inhibition of photosynthesis is primarily a result of feedback inhibition. However, complete recovery may involve the repair of damage to the chloroplasts caused by excessive starch accumulation. The rapid and complete reversal of photosynthetic inhibition suggests that the appearance of large, strong sinks at certain developmental stages could result in reduction of the large starch accumulations and that photosynthetic rates could recover to near the theoretical capacity during periods of high photosynthate demand.

UR - http://www.scopus.com/inward/record.url?scp=84942813898&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84942813898&partnerID=8YFLogxK

U2 - 10.1104/pp.78.3.619

DO - 10.1104/pp.78.3.619

M3 - Article

AN - SCOPUS:84942813898

VL - 78

SP - 619

EP - 622

JO - Plant Physiology

JF - Plant Physiology

SN - 0032-0889

IS - 3

ER -