NDLI: Diurnal Changes in Photosynthesis in Sugarcane Leaves: I. Carbon dioxide exchange rate, photosynthetic enzyme activities and metabolite levels relating to the C4 pathway and the Calvin cycle

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Diurnal Changes in Photosynthesis in Sugarcane Leaves: I. Carbon dioxide exchange rate, photosynthetic enzyme activities and metabolite levels relating to the C4 pathway and the Calvin cycle

Diurnal Changes in Photosynthesis in Sugarcane Leaves: II. Enzyme activities and metabolite levels relating to sucrose and starch metabolism

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Volume 2, 1999

Volume 1, 1998

Diurnal Changes in Photosynthesis in Sugarcane Leaves: I. Carbon dioxide exchange rate, photosynthetic enzyme activities and metabolite levels relating to the C4 pathway and the Calvin cycle

Content Provider	Taylor & Francis Online
Author	Du, Yu-Chun Kondo, Ayumu Wasano, Kikuo Nose, Akihiro
Abstract	Diurnal changes in carbon dioxide exchange rate (CER), stomatal conductance (gs), photosynthetic enzyme activities and metabolite levels relating to the C4 pathway and the Calvin cycle in sugarcane (Saccharum sp. cv. NiF4) leaves were characterized during a natural 24 h day-night cycle. The activities of phosphoenolpyruvate carboxylase (PEPcase), NADP-malic enzyme (NADP-ME), pyruvate, P1 dikinase (PPDK), ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and chloroplast fructose-1,6-bisphosphatase (FBPase) all exhibited distinct diurnal changes. The levels of C4 metabolites, malate, phosphoenolpyruvate (PEP) and pyruvate, showed large diurnal fluctuations, but the oxaloacetate levels were extremely low and exhibited no significant changes in the day-night cycle. Diurnal changes in CER and gs paralleled the changes in radiation of sunlight. The results in this study suggest that at midday when CER is in steady-state and saturated by full sunlight, CER is limited by PPDK activity ; under lower radiation of sunlight, i.e., before CER is saturated in the morning and during the period when CER is decreasing in the afternoon, CER is possibly limited by PEPcase activity or gs.
Starting Page	3
Ending Page	8
Page Count	6
File Format	PDF HTM / HTML
ISSN	1343943X 13491008
DOI	10.1626/pps.3.3
Journal	Plant Production Science
Volume Number	3
Issue Number	1
Language	English
Publisher	Taylor & Francis
Publisher Date	2015-12-07
Access Restriction	Open
Subject Keyword	C4 metabolites C4 photosynthesis Diurnal changes Photosynthetic enzymes Sugarcane
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science

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Diurnal Changes in Photosynthesis in Sugarcane Leaves: II. Enzyme activities and metabolite levels relating to sucrose and starch metabolism

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Diurnal Changes in Photosynthesis in Sugarcane Leaves: I. Carbon dioxide exchange rate, photosynthetic enzyme activities and metabolite levels relating to the C4 pathway and the Calvin cycle

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