+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Control of photosynthesis in barley plants with reduced activities of glycine decarboxylase

, : Control of photosynthesis in barley plants with reduced activities of glycine decarboxylase. Planta 02(2): 171-178

A mutant (LaPr 87/30) of barley (Hordeum vulgare L.) deficient in glycine decarboxylase (GDC; EC was crossed with wild-type plants to generate heterozygous plants with reduced GDC activities. Plants of the F2 generation were grown in air and analysed for reductions in GDC proteins and GDC activity. The leaves of heterozygous plants contained reduced amounts of H-protein, and when the content of H-protein was lower than 60% of the wild-type, the P-protein was also reduced. The contents of the other two proteins of the GDC complex, T-protein and L-protein were not affected. Glycine decarboxylase activities, measured as the decarboxylation of [1-14C] glycine by intact mitochondria released from protoplasts, were between 47% and 63% of the wild-type activity in heterozygous plants and between 86% and 100% in plants with normal contents of H-protein. The enzyme activity was linearly correlated with the relative content of H-protein. Plants with reduced GDC activities developed normally and did not show major pleiotropic effects. In air, the reduction in GDC activity had no effect on the leaf metabolite content or photosynthesis,but under conditions of enhanced photorespiration (low CO2 and and high light), glycine accumulated and the rates of photosynthesis decreased compared to the wild-type. The accumulation of glycine did not lead to a depletion of amino donors or to the accumulation of glyoxylate. The lower rates of photosynthesis were probably caused by an impaired recycling of carbon in the photorespiratory pathway. It is concluded that GDC has no control over CO2 assimilation under normal growth conditions, but appreciable control by GDC becomes apparent under conditions leading to higher rates of photorespiration.


DOI: 10.1007/s004250050116

Other references

Tang, Y-Nan.; Wei, L.; Tang, Y-Yan.; Wang, Z-Hong.; Zhang, H-Min.; Zhao, F-Lin., 2011: A follow-up of the survival and medical factors responsible for the termination of treatment in very or extremely low birth weight infants. To study the outcomes of very or extremely low birth weight (VLBW/ELBW) infants born between 2000 and 2008 in a single NICU and the medical factors associated with the termination of treatment in some infants. In this case control study, the clini...

Allen, A.A., 1981: Apion simile Kby Col Apionidae in SE London. Entomologist's Record and Journal of Variation 93.3-4: 82

Liang, J-xian.; Zhang, Y-qin.; Zhai, Y-fei., 2013: Anesthetic management in neonates receiving percutaneous balloon pulmonary valvuloplasty for critical pulmonary stenosis/atresia with intact ventricular septum. Nan Fang Yi Ke Da Xue Xue Bao 30(12): 2718-2720

Balas, P.; Bonatsos, G.; Xeromeritis, N.; Karamanakos, P.; Kambilafkas, J., 1985: Early surgical results on acute arterial occlusion of the extremities. Although the earliest possible embolectomy is still correlated with best rates of limb salvage, we consider, as do most other authors, that the only critical criterion for operability must be the viability of the ischemic limb. Even in the presenc...

Bae, N.; Lödl, M.; Pollak, A.; Lubec, G., 2012: Mass spectrometrical analysis of cuticular proteins from the wing of Hebemoia glaucippe (Linnaeus, 1758) (Lepidoptera: Pieridae). Although several insect cuticular genes and proteins are annotated and an arthropod cuticular database is available, mass spectrometrical data on cuticular proteins and their post-translational modifications are limited. Wings from Hebemoia glauci...

Spolders, M.; Flachowsky, G., 2006: Spurenelemente und futterqualitat - Vergleich von Bedarfsemfehlungen und zulassigen Hochstgehalten von Spurenelementen. The deduction of trace element requirements or recommendations for domestic animals based primarily on dose-response studies, in some cases on the factorial method. Various influencing factors on absorption of trace elements make the deduction of...

Werth, S.; Sork, V.L., 2011: Identity and genetic structure of the photobiont of the epiphytic lichen Ramalina menziesii on three oak species in southern California. Lichens, a classic example of an obligate symbiosis between fungi and photobionts (which could be algae or cyanobacteria), are abundant in many terrestrial ecosystems. The genetic structure of the photobiont population found in association with a...

Mazigo, H.D.; Bahemana, E.; Konje, E.T.; Dyegura, O.; Mnyone, L.L.; Kweka, E.J.; Kidenya, B.R.; Heukelbach, J., 2012: Jigger flea infestation (tungiasis) in rural western Tanzania: high prevalence and severe morbidity. Epidemiologic and clinical data on the parasitic skin disease tungiasis are limited from sub-Saharan Africa, and virtually nonexistent from the East African region. We performed a community-based cross-sectional study in two villages in Kasulu dis...

Paroda, R.S.; Arora, R.K., 1992: Genetic resources, crop improvement and sustainable agriculture. The rich source of genetic resources of food plants and their wild relatives that occur in 12 world centres of diversity are briefly described. With emphasis on India, information is presented on the germplasm accessions assembled in 9 internal ag...

Margalef R., 1975: Typology of reservoirs. Sladecek, V (Ed ) Internationale Vereinigung Fuer Theoretische Und Angewandte Limnologie, Verhandlungen International Association Of Theoretical And Applied Limnology, Proceedings, Vol 19, Parts 1-4 Winnipeg, Manitoba, Canada, 1974 Iii+748p (Pt 1 ); Iv+848p (Pt 2 ); Iv+928p (Pt 3 ); Iii+886p (Pt 4 ) E Schweizerbart'sche Verlagsbuchhandlung: Stuttgart, West Germany Isbn 3-510-54008-5(Pt 1 ); Isbn 3-510-54009-3(Pt 2); Isbn 3-510-54010-7(Pt 3 ); Isbn 3-510-54011-5(Pt 4 ) 18