Using stems as materials,propagation in vitro of Dioscorea fordii Prain et Burkill was studied under the temperature of(25±1)℃,illumination intensity of 24～30 μmol·m-2·s-1 and illumination time of 10 h/d,in the MS basic culture medium.
以淮山(Dioscorea fordii Prain et Burkill)茎段为材料,以MS为基本培养基,在(25±1)℃、光照强度24~30μmol/m2.s-1、光照时间10 h/d条件下对淮山的组织培养与快速繁殖技术进行了研究.
Under different tissue cultureconditions, the regeneration frequency of adventitious shoots from hypocotyls varied as: thatof light culture in alternating temperatures of day 26-28X2 and night 18-20C > that of darkculture in constant temperature of 26-28XD > that of light culture in constant temperature of26-28 0C, which revealed that the differentiation of shoots was more sensitive to temperaturethan to illumination.
Within 10s illumination (20μmol.m-2.s-1), the main physiological and biochemical changes of seeding leaves include the reduction of photoactive Pchlide to Chlide (absorption peak in 690nm and 672nm), and the fast esterification of Chlide into Chi a.
In the condition of dim-light (200μmol·m-2·s-1) ,local present normal light intensity (1100μmol·m-2·s-1) and powerfull light (2600μmol·m-2·s-1),Pn increased respectively by 45.06%,41.11% and 36.65 % . with the CO2 concentration increased by one time.
When fertility sensitive stage photoperiod were at I, II, III, IV and V, the percentages of fertile pollen vary in the ranges 0.00%、 1.65%、 10.48%、 51.89% and 60.84%, respectively. The critical photoperiod of sterility and fertility in the eight PGMS lines were 13.0h~13.8h.
To optimize the cell growth and metabolite production, the effect of phytohormone combinations, basal medium, inoculum density, sucrose concentration and photoperiod was studied. The optimal medium formulation was found to be 1/2MS + 0.25mg/L NAA + 0.5mg/L KT + 30 g/L sucrose.
In light of Brenti's work on certain R-polynomials, this formula raises interesting questions about the possibility of relating Ext groups between Weyl modules to Kazhdan-Lusztig combinatorics.
Light microscopy revealed compressed villi, oedema, mononuclear cell filtration, and vacuolization on the cytoplasm of epithelial cells in the jejunum of hyperlipidemic rats.
A seaweed-chamber experiment was performed, indicating that gaseous I2 is one of the important precursors that lead to new particle formation in the presence of solar light in the ambient air at the coastal tidal area.
Investigation on the acute biochemical effects of light rare earths on rat serum by NMR-based metabonomic approaches
1H-NMR spectroscopy and pattern recognition (PR) method were used to assess the acute biochemical effects of light rare earths.
But when it was irradiated under UV illumination or solar irradiation for some time, the catalyst could be reused without loss of catalytic activity.
For three tested samples, under UV illumination CCT01 has the highest activity for MB photocatalytic degradation, while in the case of RB, CCT02 is the most active photocatalyst.
Under visible light illumination, CCT005 has the highest activity for both MB and RB photocatalytic degradation.
After treatment of the mycelium with 5-azacytidine, the protoperithecia formation was accompanied by inversely proportional changes in the formation of conidia, both in the dark and after illumination.
A New Type of Adaptation of the Cyanobacterium Spirulina platensis to Illumination Conditions
However, in habitats lacking sufficient nutrition and with higher light intensity, survival rates and space-occupying ability of two kinds of seedlings (sexual and asexual produced) were low and the space would be preempted by grown-up plantlets.
The time required for fluorescence to reach its peak intensity and the degree of fluorescence quenching depending on light intensity are analyzed.
In the diatoms limited in nitrogen and assimilating exogenous glucose, P was found to decrease or increase depending on the light intensity, glucose concentration, and the duration of exposure.
In the diatoms assimilating both nitrate nitrogen and glucose, compared to those supplied with nitrates alone, P was higher at the medium and high light intensities and lower at the low light intensity.
High light intensity improved the physiological state of carp yearlings, while zero illumination had an inverse effect.