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Environmental and genetic control of morphogenesis in crops: towards models simulating phenotypic plasticity
CSIRO Publishing - Tập 56 Số 11 - Trang 1289 - 2005
As molecular biologists are realising the importance of physiology in
understanding functional genomics of quantitative traits, and as physiologists
are realising the formidable prospects for improving their phenotypic models
with information on the underlying gene networks, researchers worldwide are
working on linked physiological–genetic models. These efforts are in their early
methodological st...
Photosynthetic dysfunction and in vivo changes in chlorophyll a fluorescence from manganese-deficient wheat leaves
CSIRO Publishing - Tập 36 Số 2 - Trang 157 - 1985
Leaves on wheat plants growing in manganese-deficient media showed much higher
constant-yield fluorescence (Fo) but greatly reduced variable fluorescence (Fv).
Higher Fo was symptomatic of a stronger overall emission which derived from
functional changes within photosynthetic membranes and was not simply
attributable to differences in leaf reflectivity of wavelengths relevant to
fluorescence measu...
The analysis of adaptation in a plant-breeding programme
CSIRO Publishing - Tập 14 Số 6 - Trang 742 - 1963
The adaptation of barley varieties was studied by the use of grain yields of a
randomly chosen group of 277 varieties from a world collection, grown in
replicated trials for several seasons at three sites in South Australia. For
each variety a linear regression of yield on the mean yield of all varieties for
each site and season was computed to measure variety adaptation. In these
calculations the...
Phosphorus export at the paddock, farm-section, and whole farm scale on an irrigated dairy farm in south-eastern Australia
CSIRO Publishing - Tập 56 Số 1 - Trang 1 - 2005
Phosphorus (P) exported from agricultural land contributes to the eutrophication
of inland water systems. Although P export has been extensively researched at
the paddock scale, our understanding of farm-scale export is limited. This paper
presents the results of a 3-year monitoring project that investigated P export
at the paddock, farm-section, and whole farm scales on an irrigated dairy farm
in...
Ecosystem processes in semiarid grasslands. I. Primary production and water use of two communities possessing different photosynthetic pathways
CSIRO Publishing - Tập 29 Số 4 - Trang 773 - 1978
Above- and below-ground productivity and estimated evapotranspiration rates of a
C3 native grassland and a sown C4 buffel grassland community growing on sandy
red earth soils at Charleville were studied over a 12-month period. Resistance
to water vapour transfer from leaves of both species was measured in the field
and glasshouse. Although buffel grass had the highest maximum above-ground
growth r...
The histotropic phase of the nematode parasite, Ostertagia circumcinta.
CSIRO Publishing - Tập 5 Số 1 - Trang 130 - 1954
The histotropic phase of Ostertagia circumcincta in the abomasal mucosa of the
sheep has been investigated. Larvae were found to enter the gastric pits and
glands and there pass the third ecdysis, three days after oral administration to
the host. Some of these larvae failed to grow after ecdysis, and were found in
the mucosa as long as three months from the date of infestation. Other larvae
migrat...
Thermal status of sheep at pasture in western New South Wales
CSIRO Publishing - Tập 22 Số 5 - Trang 797 - 1971
The thermal status of three unrestrained rams at pasture was studied for a
period of 5 days during March in central western New South Wales. A temperature
telemetry system was used to measure rectal temperatures, skin surface and
subcutaneous temperatures on the mid back, and subcutaneous temperatures of the
scrotum of each ram. Rectal temperatures of 40�C and above were recorded for all
rams on e...
Distance between food and water supply and its effect on drinking frequency, and food and water intake of Merino and Border Leicester sheep
CSIRO Publishing - Tập 22 Số 2 - Trang 283 - 1971
The walking and drinking behaviour of Merino and Border Leicester wethers was
compared in summer 1968 when a diet containing 15 % sodium chloride was fed at
points that were separated from the water supply by distances of up to 5.6 km.
All sheep maintained two journeys daily to water until the distance between food
and water reached 4.0 km. At this point Merino sheep drank three times every two
da...
Effects of sheep grazing Astrebla grassland in central western Queensland. 1. Effects of grazing pressure and livestock distribution
CSIRO Publishing - Tập 31 Số 4 - Trang 797 - 1980
The effects of grazing pressure on plant responses and livestock distribution in
Astrebla grassland were determined from paddocks subject to commercial grazing
by sheep at light, medium or heavy grazing pressure. Increased grazing pressure
reduced the projected foliage cover of Astrebla spp., the basal area of which
was similar under light and medium grazing pressure, and was reduced under heavy
g...
Radiation use efficiency increases when the diffuse component of incident radiation is enhanced under shade
CSIRO Publishing - Tập 49 Số 4 - Trang 665 - 1998
Theoretical analyses have shown the radiation use efficiency of maize, soybean,
and peanut to increase with a decrease in the level of incident radiation and an
increase in the proportion of diffuse radiation. This study compared the growth
and radiation use efficiency of Panicum maximum cv. Petrie (green panic) and
Bothriochloa insculpta cv. Bisset (creeping bluegrass) beneath shading
treatments ...
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