4) Both the aboveground and underground fresh weight, dry weight, change of leaf length and width on different position of rape seedlings of all 10s-120s laser group have increased as compared with those of the check;
The results show that,wheat seedlings and oil-seed rape seedlings can absorb chlorpyrifos residue from soil to reach the concentration of 0.257～4.50μg/g and 0.249～2.02μg/g,respectively, 20 days later since chlorpyrifos was introduced into the pots,on condition that the initial concentration of chlorpyrifos residue in red soil was 1～10μg/g.
4) Both the aboveground and underground fresh weight, dry weight, change of leaf length and width on different position of rape seedlings of all 10s-120s laser group have increased as compared with those of the check;
The results also indicated that foliar sprays of 25-75 S-3307 mg/L reduced seedling height, increased leaf chlorophyll content, root oxidizability and total dry matter of rape seedlings.
The overground growth indexes of rape seedlings on stem (plant) height, leaf number, leaf area, leaf fresh/dry weight and stem fresh/dry weight are obviously decreased as compared with CK. The range of decrease is 13.2%～44.1% (T1) and 21.4%～49.3% (T2) respectively.
griseoviridis in the rhizosphere of turnip rape seedlings and is not due to the movement of microbe through the rhizosphere by water infiltration.
Bacterial growth rates on the rhizoplane of rape seedlings grown in sand were determined using 3H-thymidine incorporation into DNA.
During the same time period, RbcS IV transcript levels decreased simultaneously, suggesting that GSBF1 acts as a developmental, stage-specific, negative regulator of RbcS IV gene expression in rape seedlings.
Similar results were observed in whole rape seedlings subjected to drought conditions.
A novel screening test is described for the discrimination of transgenic phosphinothricin tolerant oilseed rape from non transgenic rape seedlings.
Among the plant species with a wide range of radiosensitivity to ionizing radiation, Brassica napus L. is one of the most resistant plants, and barley is a rather sensitive one. The inhibition of barley growth induced by medium dosage of Xirradiation was decreased by pre-irradiation treatment with the extract of rape seedlings. After dilution of the extract 4 or 6 times, there was still the radioprotective effect of the extract. After the extract was heated in boiling water bath for 5 minutes. The protective...
Among the plant species with a wide range of radiosensitivity to ionizing radiation, Brassica napus L. is one of the most resistant plants, and barley is a rather sensitive one. The inhibition of barley growth induced by medium dosage of Xirradiation was decreased by pre-irradiation treatment with the extract of rape seedlings. After dilution of the extract 4 or 6 times, there was still the radioprotective effect of the extract. After the extract was heated in boiling water bath for 5 minutes. The protective effect remained. The extracts of wheat, pea and soybean prepared by the same method had no such protective effect. The extracts of B. chinensis L. and B. juncea Coss. had the same protective effect on barley.
The rape seedling which germinated in hormone media were with bigger and thicker cotyledens,lesser and shorter roots,stronger and shorter hypoco-tyls.Sometimes, calluses were directly formed from hypocotyls fo seedling, alluses could usually be induced formation in the range from 1-3 mg/1 2,4-D, but adding 0.1 to 1 mg/1 6BA in them,it was beneficial to calluses defferen-tiation later. The induced frequency of callus of cotyleden was higher than hypocotyl's. The induced frequency of DSV-SR-50, a'double...
The rape seedling which germinated in hormone media were with bigger and thicker cotyledens,lesser and shorter roots,stronger and shorter hypoco-tyls.Sometimes, calluses were directly formed from hypocotyls fo seedling, alluses could usually be induced formation in the range from 1-3 mg/1 2,4-D, but adding 0.1 to 1 mg/1 6BA in them,it was beneficial to calluses defferen-tiation later. The induced frequency of callus of cotyleden was higher than hypocotyl's. The induced frequency of DSV-SR-50, a'double lower'cultivar, was the highest in three cultivars.The calluses derived from hypocotyl which germinated in hormone medium were initiated earlier, developed quicklier and a higher induced frequency . However, they could be directly differentiated shoots in induced medium. Calluses could be differentiated shoots in B5 media containing 1 mg/1 IAA and 1 to 7 mg/1 6BA, but its differentiated frequency was the highest in 3 or 5 mg/1 6BA media . The differentiated frequency of Small Tower was the highest with 45. 65%, following DSV-SR-50 34.32%, Liglando 22.79%.The pre-medium and genotype of meterials related with the inducation and differentiation of calluse was discussed.
The authors' experiment showed that spraying palcobutrazol (PP_(333)) upon rape seedlings might make leaf color darker,leaf blade thicker,total number of leaves per plant greater,chlorophyll content higher,leaf stalk shorter,root collar thicker,root system more developed and shoot-root ratio smaller as compared with control (non-sprayed) seedlings.The results of determination indicated that carbohyd- rate content and dry weight per plant of sprayed plants were higher than those of con- trol seedlings.The...
The authors' experiment showed that spraying palcobutrazol (PP_(333)) upon rape seedlings might make leaf color darker,leaf blade thicker,total number of leaves per plant greater,chlorophyll content higher,leaf stalk shorter,root collar thicker,root system more developed and shoot-root ratio smaller as compared with control (non-sprayed) seedlings.The results of determination indicated that carbohyd- rate content and dry weight per plant of sprayed plants were higher than those of con- trol seedlings.The sprayed plant had cellular seructure closely arranged and tissues well developed.They were consistently more vigourous than the control plants from winter to spring.Their flower bud differentiation was also stronger.The experiment proved that rape seed yield of plants sprayed with 100—200 ppm PP_(333) at 2 or 3-leaf stages was 10.0—17.5% higher than that of the control plant with significant diffe- rence at the 1% level.The main reason of higher seed yield of sprayed plants was that siliqua number per plant increased as compared to that of control plants.
rape seedlings
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