Photosynthetic flexibility in maize exposed to salinity and shade

In maize, salinity reduced photosynthesis by decreasing stomatal conductance. Shade downregulated PEPC more than Rubisco, leading to decreased bundle-sheath CO2 leakiness. The treatments elicited plasticity in NADP-ME/PEP-CK activity ratio.

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Bibliographic Details
Published inJournal of experimental botany Vol. 65; no. 13; pp. 3715 - 3724
Main Authors Sharwood, Robert E, Sonawane, Balasaheb V, Ghannoum, Oula
Format Journal Article
LanguageEnglish
Published England Oxford University Press [etc.] 01.07.2014
Oxford University Press
Subjects
C4 photosynthesis
carbon dioxide
Carbon Dioxide - metabolism
Carbon isotopes
Carbon Isotopes - analysis
Corn
Enzymes
Light
Malate Dehydrogenase - genetics
Malate Dehydrogenase - metabolism
Nitrogen - metabolism
Phosphoenolpyruvate Carboxykinase (ATP) - genetics
Phosphoenolpyruvate Carboxykinase (ATP) - metabolism
Phosphoenolpyruvate Carboxylase - genetics
Phosphoenolpyruvate Carboxylase - metabolism
Photosynthesis
Plant biochemistry
Plant physiology
Plant Proteins - genetics
Plant Proteins - metabolism
Plant Transpiration
RESEARCH PAPER
ribulose-bisphosphate carboxylase
Ribulose-Bisphosphate Carboxylase - genetics
Ribulose-Bisphosphate Carboxylase - metabolism
Salinity
Stomatal conductance
Stress, Physiological
Sunlight
Zea mays - genetics
Zea mays - growth & development
Zea mays - physiology
Zea mays - radiation effects
NADP-ME
carbon isotope discrimination
Rubisco
C4 photosynthesis
PEPC
leakiness
PEP-CK
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Summary:In maize, salinity reduced photosynthesis by decreasing stomatal conductance. Shade downregulated PEPC more than Rubisco, leading to decreased bundle-sheath CO2 leakiness. The treatments elicited plasticity in NADP-ME/PEP-CK activity ratio.
Bibliography:http://dx.doi.org/10.1093/jxb/eru130
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0022-0957
1460-2431
DOI:10.1093/jxb/eru130