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A quantitative model of wheat root systems is developed that links the size and distribution of the root system to the capture of water and nitrogen (which are assumed to be evenly distributed with depth) during grain filling, and allows estimates of the economic consequences of this capture to be assessed. A particular feature of the model is its use of(More)
Wheat provides 20% of calories and protein consumed by humans. Recent genetic gains are <1% per annum (p.a.), insufficient to meet future demand. The Wheat Yield Consortium brings expertise in photosynthesis, crop adaptation and genetics to a common breeding platform. Theory suggest radiation use efficiency (RUE) of wheat could be increased ~50%; strategies(More)
We report here the complete amino acid sequence of another member of the type beta transforming growth factor gene family, deduced from the nucleotide sequence of three overlapping cDNA clones. The C-terminal 112 amino acids share approximately 80% sequence identity with type beta 1 and beta 2 transforming growth factors, with many of the remaining(More)
The genetic variability of the duration of leaf senescence during grain filling has been shown to affect both carbon and nitrogen acquisition. In particular, maintaining green leaves during grain filling possibly leads to increased grain yield, but its associated effect on grain protein concentration has not been studied. The aim of this study was to(More)
The steady-state interaction between protein phosphatase-1 and its two inhibitor proteins was studied in vitro at low enzyme concentrations where the assumptions of the Michaelis-Menten equation appeared to be valid. Under these conditions, and in the absence of divalent cations, inhibitor-1 behaved as a mixed inhibitor using phosphorylase alpha as a(More)
Meiotic maturation of amphibian oocytes induced by progesterone is known to be regulated by protein phosphorylation. To investigate a possible role for protein phosphatase-1 in this process, the effect of phosphatase inhibitor-2 was determined on the in vivo rate of dephosphorylation of phosphorylase a and on the rate of oocyte maturation. Dephosphorylation(More)
To address the need for new approaches to antibiotic drug development, we have identified a large number of essential genes for the bacterial pathogen, Staphylococcus aureus, using a rapid shotgun antisense RNA method. Staphylococcus aureus chromosomal DNA fragments were cloned into a xylose-inducible expression plasmid and transformed into S. aureus.(More)
OBJECTIVES This study evaluated the effectiveness of cardiac counseling and rehabilitation programs led by a nurse counselor, compared with normal care on outcomes for myocardial infarction (MI) patients and their partners. METHODS A randomized controlled trial with follow-up to 1 year was conducted with 100 patients recruited within 72 hours of a first(More)