12 research outputs found
Looking for new insights into the role of glutamate dehydrogenase in plant metabolism through the use of antisense, T-DNA tagged and over-expressing gdh mutants of Nicotiana plumbaginifolia and Arabidopsis thaliana
Wheat endosperm mRNA and polysomes and their in vitro translation products during development and early stages of germination
Over-expression of a glutamate dehydrogenase gene, MgGDH, from Magnaporthe grisea confers tolerance to dehydration stress in transgenic rice
Expression of glutamate dehydrogenase genes in Arabidopsis thaliana depends on the redox state of plastoquinone pool
Molecular analyses of tomato GS, GOGAT and GDH gene families and their response to abiotic stresses
Effects of nitrogen form on growth, CO2 assimilation, chlorophyll fluorescence, and photosynthetic electron allocation in cucumber and rice plants*
Cucumber and rice plants with varying ammonium (NH4
+) sensitivities were used to examine the effects of different nitrogen (N) sources on gas exchange, chlorophyll (Chl) fluorescence quenching, and photosynthetic electron allocation. Compared to nitrate (NO3
−)-grown plants, cucumber plants grown under NH4
+-nutrition showed decreased plant growth, net photosynthetic rate, stomatal conductance, intercellular carbon dioxide (CO2) level, transpiration rate, maximum photochemical efficiency of photosystem II, and O2-independent alternative electron flux, and increased O2-dependent alternative electron flux. However, the N source had little effect on gas exchange, Chl a fluorescence parameters, and photosynthetic electron allocation in rice plants, except that NH4
+-grown plants had a higher O2-independent alternative electron flux than NO3
−-grown plants. NO3
− reduction activity was rarely detected in leaves of NH4
+-grown cucumber plants, but was high in NH4
+-grown rice plants. These results demonstrate that significant amounts of photosynthetic electron transport were coupled to NO3
− assimilation, an effect more significant in NO3
−-grown plants than in NH4
+-grown plants. Meanwhile, NH4
+-tolerant plants exhibited a higher demand for the reduced form of nicotinamide adenine dinucleotide phosphate (NADPH) for NO3
− reduction, regardless of the N form supplied, while NH4
+-sensitive plants had a high water-water cycle activity when NH4
+ was supplied as the sole N source