Research on the Diurnal Courses of Abscissic Acid, 1-Aminocyclopropane Carboxylic Acid and Its Malonyl Conjugate Contents in Needles of Damaged and Undamaged Spruces

Ethylene regulates many aspects of plant growth, development and senescence. The immediate precursor of ethylene was identified as 1-aminocyclopropane carboxylic acid (ACC) [7]. Amrhein et al. [1] discovered that ACC supplied exogenously was efficiently converted into ACC malonyl conjugate (MACC) along with ethylene production.

Transcranial Doppler diagnosis of cerebral vasospasm following subarachnoid haemorrhage: correlation and analysis of results in relation to the age of patients.

A retrospective analysis was undertaken to determine whether cerebral vasospasm following subarachnoid haemorrhage (SAH) correlates with the age of patients. For at least 3 weeks after bleeding 80 subjects underwent very close follow-up with clinical examination and transcranial Doppler records of the blood velocities within the basal cerebral arteries. Firstly a correlation between measured maximal mean blood flow velocities and age was made. Secondly, according to their age and the maximum of recorded mean velocities (v), the patients were divided into groups as follows: age 55 years or less, age more than 55 years; and maximum velocity v190 cm/s, 90 cm/sv2120 cm/s, 120 cm/sv3160 cm/s, v4…

The Influence of Brassinosteroid, a Growth-promoting Steroidal Lactone, on Development and CO2-fixation Capacity of Intact Wheat and Mustard Seedlings

In 1970, Mitchell et al. isolated a lipoidal complex from the pollen of rape (Brassica napus L.). This complex, called “Brassins” was found to have partly powerful growth-promoting properties. The novel growth response of young bean plants in the second internode assay (Worley, Mitchell 1971; Mitchell, Gregory 1972) and other physiological changes following Brassin-treatment have been studied under several aspects (Krizek, Worley 1981; Gregory 1981).

A Red Eye Colour Mutation in Culex pipiens after X-irradiation

FOUR 1–2-day-old males of Culex pipiens were irradiated with a dose of 4,000 r. The mutant ‘red eye’ (r) was isolated from F3 cultures of two of the irradiated males (♂ II and ♂ IV). From male II, there were three red-eyed females which arose out of a single F2 brother–sister mating; from male IV, 80 red-eyed females and one red-eyed male from 14 F2 brother–sister matings. According to the experimental procedure, this means that at least one sperm from male II and at least fourteen sperms from male IV carried the mutation r. Thus, the same mutation was recovered in parallel from two irradiated males. The clustered appearance of the mutation in male IV was presumably caused by the occurrence…

The accumulation of proline in needles of damaged spruces

Im Rahmen einer vergleichenden physiologischen und cytologischen Charakterisierung geschadigter und schadsymptomfreier Fichten am naturlichen Standort wurden im Spatsommer und Herbst 1984 erste Untersuchungen zum Wasserhaushalt der Baume durchgefuhrt. Messungen des Gesamtwasserpotentials, des osmotischen Potentials, des Gehaltes an verschiedenen Kohlenhydraten und an der freien Aminosaure Prolin deuten auf Veranderungen im Wasserhaushalt geschadigter Fichten. Besonders signifikante Ergebnisse waren beim Prolin zu verzeichnen. Wahrend bei den symptomfreien Fichten der Prolingehalt der Nadeln ungeachtet des Standortes und der Witterungsverhaltnisse konstant niedrig lag, trat bei Schadigung ei…

Comparative Investigation on the Nutrient Composition of Healthy and Injured Spruces of Different Locations

Investigations on the content of cations (Ca2+, K+, Mg2+ and Mn2+) were carried out in spruce trees at two exemplary locations in the Taunus montains (Konigstein) and in the Hunsruck mountains (Hattgenstein) in the course of the vegetation period in 1985 and 1986.

Aneurysm surgery of patients in poor grade condition. Indications and experience

Out of a total of 196 patients admitted with aneurysmal subarachnoid haemorrhage (SAH) to the neurological department in Mainz over a 42 month period, 48 patients (24.5%) were considered as grade IV or V on admission. Aneurysm surgery within 48 hours after SAH was performed in 56.3% of these patients, 2% were operated between day 3 and 7 and 16.6% were operated after day 7. 25% did not undergo operation because of severe neurological deficit and brain damage. The overall outcome according to the Glasgow outcome scale in the surgically treated group was full recovery in 11.1%, moderate disability in 16.7%, severe disability in 47.2%, vegetative state in 2.8% and death in 22.2%. All patients …

Molecular Characterization of the Multigene Family Encoding the Different Glutamine Synthetase Isoforms in the Amphidiploid CROP Brassica Napus

The fusion of the A genome of Brassica campestris (AA/n=10) and the C genome type of Brassica oleracea (CC/n=9) has led to the origin of the amphidiploid crucifer Brassica napus (AACC/n=19) [1], one of the most important oil crop in modern farming. The production of high quality industrial lubricants, edible oils and fatty acids or the supply of high protein press-residues for animal mast are only some utilizations of oilseed rape. Furthermore, rape oil can also be used for the manufacture of alternative fuels like ‘Bio-Dieser’.

The Effect of Blue and Red Light on the Content of Chlorophyll, Cytochrome f, Soluble Reducing Sugars, Soluble Proteins and the Nitrate Reductase Activity During Growth of the Primary Leaves of Sinapis alba

The photosynthetic characteristics of many species of plants are influenced by the light intensity under which the plant is grown. This is shown by the light saturation curves for CO2 uptake. Both the light intensity required for saturation and the light-saturated rate of CO2 uptake increase with the light intensity under which the plant is grown. Photosynthetic adaptation to different light levels involves balanced changes of many leaf factors. Low-light and high-light plants differ in a number of component steps of photosynthesis as well as in the structure and composition of the photosynthetic apparatus and in the leaf anatomy (see reviews by Boardman 1977; Wild 1979).

Session 10 Photosynthesis

Studies on the Content of P 700 and Cytochromes in Sinapis alba During Growth Under Two Different Light Intensities

Sinapis alba was grown under two extremely different light intensities. We obtained two different modifications which hold several physiological and biochemical characteristics comparable to the relations in light- and shade plants. In the strong light the maximum rate of CO2-uptake increases within five days to a three-fold rate. At the same time the content of several redox systems of photosynthetic electron transport increases while the content of P 700 remains equivalent in both types of plants. In the high-light plants we find a ratio P 700: Cytochrome f of 1 but a ratio of 3 in the low-light plants. These ratios could be probably essential features of various sun- and rainforest speci…