نتایج جستجو برای: phosphate starvation

تعداد نتایج: 116758  

Journal: :Journal of bacteriology 1987
T K Ray J E Cronan

The inhibition of phospholipid synthesis engendered by starving glycerol 3-phosphate (G3P) auxotrophs of Escherichia coli (plsB or gpsA) for G3P is incomplete; 5 to 10% of the normal rate of phospholipid synthesis remains, even after prolonged starvation. We report that G3P starvation of a strain having lesions in both the gpsA and plsB genes resulted in essentially complete (greater than 98.5%...

Journal: :Plant physiology 1988
A H Goldstein A Danon D A Baertlein R G McDaniel

Three-day-old suspension cultured cells of Lycopersicon esculentum transferred to a Pi-depleted medium had 2.7 times the excreted acid phosphatase (Apase) activity of cells transferred to a Pi-sufficient medium. Cell growth during this time period was identical for the two treatments. Excreted Apase activity was resolved into two fractions on a Sephadex G-150 column. Most of the phosphate starv...

Journal: :Plant physiology 2003
Ping Wu Ligeng Ma Xingliang Hou Mingyi Wang Yungrong Wu Feiyan Liu Xing Wang Deng

Arabidopsis genome expression pattern changes in response to phosphate (Pi) starvation were examined during a 3-d period after removal of Pi from the growth medium. Available Pi concentration was decreased after the first 24 h of Pi starvation in roots by about 22%, followed by a slow recovery during the 2nd and 3rd d after Pi starvation, but no significant change was observed in leaves within ...

Journal: :Journal of bacteriology 1999
M L Summers M C Denton T R McDermott

Recent work in this laboratory has shown that the gene coding for acetate kinase (ackA) in Sinorhizobium meliloti is up-regulated in response to phosphate limitation. Characterization of the region surrounding ackA revealed that it is adjacent to pta, which codes for phosphotransacetylase, and that these two genes are part of an operon composed of at least two additional genes in the following ...

Journal: :Plant physiology 2007
Caifu Jiang Xiuhua Gao Lili Liao Nicholas P Harberd Xiangdong Fu

Phosphate (Pi) is a macronutrient that is essential for plant growth and development. However, the low mobility of Pi impedes uptake, thus reducing availability. Accordingly, plants have developed physiological strategies to cope with low Pi availability. Here, we report that the characteristic Arabidopsis thaliana Pi starvation responses are in part dependent on the activity of the nuclear gro...

Journal: :Journal of bacteriology 1990
S C Winans

Transcription of the virG gene of Agrobacterium tumefaciens was previously shown to be expressed from two tandem promoters and to be responsive to three stimuli: plant-released phenolic compounds, phosphate starvation, and acidic media. In this report, I describe a set of deletions and other alterations of the 5' end of virG that show that the upstream promoter (P1) is necessary for induction b...

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