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25 papers found.
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Nitrogen nutrition and the role of root–shoot nitrogen signalling particularly in symbiotic systems

To obtain and concentrate reduced N from the environment, plants have evolved a diverse array of adaptations to utilize soil, biotic and atmospheric N. In symbiotic N2‐fixing systems the potential for oversupply exists and regulation of activity to match demand is crucial. N status in plants is likely to be most strongly sensed in the shoot and signals translocated to the roots...

Cycling of amino compounds in symbiotic lupin

Richard Parsons 0 Andrea Baker 0 0 Department of Biological Sciences, University of Dundee , Dundee DD14HN, UK The composition of amino acids was determined in the xylem and phloem sap of symbiotic

Evidence for N feedback regulation of N2 fixation in Alnus glutinosa L.

Andrea Baker 0 Graham F. Hill 0 Richard Parsons 0 0 Department of Biological Sciences, University of Dundee , Dundee DD1 4HN , UK Treatments were applied to vary C and N availability in Alnus

Relations of Changes in Coronary Disease Rates and Changes in Risk Factor Levels: Methodological Issues and a Practical Example

One of the main hypotheses of the World Health Organization (WHO) MONICA Project is that trends in the major coronary disease risk factors are related to trends in rates of fatal and non-fatal coronary disease events. The units of study are populations rather than individuals. The WHO MONICA Project involves continuous monitoring of all coronary disease events in the populations...

Declining Rates of Coronary Heart Disease in New Zealand and Australia, 1983–1993

The authors report the results of 10 years of monitoring of trends in the rates of major nonfatal and fatal coronary events and in case fataJHy in Auckland, New Zealand, and in Newcastle and Perth, Australia. Continuous surveillance of all suspected myocardial infarctions and coronary deaths in people aged 35–64 years was undertaken in the three centers as part of the World...