+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Regulation of Photosynthetic Induction State by the Magnitude and Duration of Low Light Exposure

, : Regulation of Photosynthetic Induction State by the Magnitude and Duration of Low Light Exposure. Plant Physiology 105(4): 1115-1123

This study was undertaken to examine the dependence of the regulatory enzymes of photosynthetic induction on photon flux density (PFD) exposure in soybean (Glycine max L). The induction state varies as a function of both the magnitude and duration of the PFD levels experienced prior to an increase in PFD. The photosynthetic induction state results from the combined activity of separate processes that each in turn depend on prior PFD environment in different ways. Direct measurement of enzyme activities coupled with determination of in situ metabolite pool sizes indicated that the fast-indudion component was associated with the activation state of stromal fructose-1,6-bisphosphatase (FBPase, EC and showed rapid deactivation in the dark and at low PFD. The fast-indudion component was activated at low PFD levels, around 70 micromoles photons m-2 s-1. Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco, EC deactivated very slowly in the dark and required higher PFD for activation. Both enzymes saturated at lower PFD than did photosynthesis, around 400 micromoles photons m-2 s-1 Ribulose-5-phosphate kinase (EC appeared never to be limiting to photosynthesis, and saturated at much lower PFD than either FBPase or Rubisco. Determination of photosynthetic metabolite pool sizes from leaves at different positions within a soybean canopy showed a limitation to carbon uptake at the stromal FBPase and possibly the sedoheptulose-1,7bisphosphatase (EC in shade leaves upon initial illumination at saturating PFD levels.

(PDF same-day service: $19.90)

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 002477225

PMID: 12232269

DOI: 10.2307/4275961

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Adamska, I.; Scheel, B.; Kloppstech, K., 1991: Circadian oscillations of nuclear-encoded chloroplast proteins in pea (Pisum sativum). The diurnal and circadian expression of light-inducible chloroplast proteins, i.e. light-harvesting chlorophylla/b protein (LHCP), early light-inducible protein (ELIP) and Fe-S Rieske, has been studied in young pea plantlets at the level of mRNA i...

Kohyama, K., 2005: Japanese foods for elderly people. The mastication characteristics of elderly individuals was measured by electromyography (EMG) in order to gather information on the preparation of foods for this age group. Healthy elderly subjects showed lower EMG activity per chew and more chewi...

Sudhakar, K.; Veeresh, GK., 1988: Swarming patterns of different species of termites in an agroforest ecosystem. Journal of Soil Biology and Ecology, 82: 137-139

Pandey, K.C.; Agrawal, N.; Vishwakarma, P.; Sharma, J., 2003: Redescription of some Indian species of Thaparocleidus Jain, 1952 (Monogenea), with aspects of the developmental biology and mode of attachment of T. pusillus (Gusev, 1976). Thaparocleidus wallagonius Jain, 1952, the type-species of the genus, is redescribed from the type-host and locality. T. gomtius (Jain, 1952), T. seenghali (Jain, 1961), T. indicus (Kulkarni, 1969), T. malabaricus (Gusev, 1976) and T. pusillus (Gu...

Kitahara, Takeshi; Tanida, Kaichi; Mori, Kenji, 1983: The synthesis of ((plus or minus))-c-irones. Agricultural and Biological Chemistry 47: 1-6

Korpelainen, R.; Orava, S.; Karpakka, J.; Siira, P.; Hulkko, A., 2001: Risk factors for recurrent stress fractures in athletes. Our aim was to identify factors predisposing athletes to multiple stress fractures, with the emphasis on biomechanical factors. Our hypothesis was that certain anatomic factors of the ankle are associated with risk of multiple stress fractures of...

Yamada, R.; Kuba, H.; Ishii, T.M.; Ohmori, H., 2005: Hyperpolarization-activated cyclic nucleotide-gated cation channels regulate auditory coincidence detection in nucleus laminaris of the chick. Coincidence detection of bilateral acoustic signals in nucleus laminaris (NL) is the first step in azimuthal sound source localization in birds. Here, we demonstrate graded expression of hyperpolarization-activated cyclic nucleotide-gated (HCN) ca...

Ledencan, T.; Simic, D.; Brkic, I.; Jambrovic, A.; Zdunic, Z., 2003: Resistance of maize inbreds and their hybrids to Fusarium stalk rot. The resistance of 35 inbred lines and their 70 hybrids with two testers to stalk rot is described and the results of natural and artificial stalk infection are compared. A mixture of Fusarium spp. spores was used for artificial infections. The dis...

Oliveira, A. M.; Aigner, T.; Nascimento, A. G., 2002: Chondrocytic differentiation An unusual feature of extraskeletal myxoid chondrosarcoma. Laboratory Investigation 82(1): 21A, January

Babcock A.M.; Gunion M.W.; Rosenthal M.J.; Lomax P.; Barton C., 1990: Bombesin infusion into the preoptic area alters plasma metabolic fuels and produces hypothermia in food deprived and insulin pretreated rats. Society for Neuroscience Abstracts 16(1): 518