Ammonia Accumulation and Inhibition of Photosynthesis in Methionine Sulfoximine Treated Spinach
نویسندگان
چکیده
منابع مشابه
The Effect of Phosphinothricin (Glufosinate) on Photosynthesis I. Inhibition of Photosynthesis and Accumulation of Ammonia
Phosphinothricin (glufosinate) is an irreversible inhibitor of glutamine synthetase in plants. En zyme inhibition results in substantial light-dependent accumulation of ammonia, inhibition of photosynthesis and ultimately the death of the plants. First o f all the metabolic processes in which NH 3 is liberated were established. Comparative investigations under photorespiratory and nonphotoresp...
متن کاملInhibition of glutamine synthetase by methionine sulfoximine. Studies on methionine sulfoximine phosphate.
The irreversible inhibition of glutamine synthetase by methionine sulfoximine is associated with the tight binding to the enzyme of adenosine diphosphate and methionine sulfoximine phosphate; the latter compound can be cleaved nonenzymatically and also by phosphatases to equimolar amounts of methionine sulfoximine and inorganic phosphate. Methionine sulfoximine phosphate is oxidized by L-amino ...
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Photosynthetic oxygen evolution by isolated spinach (Spinacia oleracea L.) chloroplasts approached complete inhibition in the presence of a 5 mm concentration of sulfur dioxide. A similar inhibition was observed in the presence of equimolar concentrations of bisulfite ions, suggesting a parallel mode of action. In contrast, an equimolar concentration of sulfite ions was markedly less inhibitory...
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The inhibition of photosynthetic CO(2) fixation by O(2), commonly referred to as the Warburg effect, was examined in isolated intact spinach (Spinacia oleracea) chloroplasts. The major characteristics of this effect in isolated chloroplasts are rapid reversibility when O(2) is replaced by N(2), an increased inhibition by O(2) at low concentrations of CO(2) and a decreased effect of O(2) with in...
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The inhibition of photosynthetic CO9 fixation by O,, commonly referred to as the Warburg effect, was examined in isolated intact spinach (Spinacia oleracea) chloroplasts. The major characteristics of this effect in isolated chloroplasts are rapid reversibility when 02 is replaced by N2, an inoreased inhibition by 09 at low concentrations of CO2 and a decreased effect of 09 with increased concen...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1981
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.67.3.509