This paper dealt with the studying the germination percentage. germination potential and analyzing thegermination of the seeds wtith different treatments by systematic statistics method Seeds were collected from 14 p...This paper dealt with the studying the germination percentage. germination potential and analyzing thegermination of the seeds wtith different treatments by systematic statistics method Seeds were collected from 14 prove-nances in September 1994. The results indicated that the germination percentage and germinalion potential of the seeds invarious provenances were different. Both indexes in Nanchang area was much lower than those in the rest provcnances.The germination percentage and germination potenlial of the seeds in different provenance deelined after the seeds weretreated with aging for one year. The light treatment might promotes the germination percentage more effectively than thegermination potential. In addition. fuzzy cluster may refleet the relationship among germination in different protenances.展开更多
High concentrations of heavy metals (Pb, Zn, As, Cd) were found in the vegetative and generative organs of Paulownia tomentosa (Thunb.) Steud., 1841) in industrial production zones and along transport routes in Samark...High concentrations of heavy metals (Pb, Zn, As, Cd) were found in the vegetative and generative organs of Paulownia tomentosa (Thunb.) Steud., 1841) in industrial production zones and along transport routes in Samarkand, Samarkand region of the Republic of Uzbekistan. The obtained results confirm the potential of using this plant for phytoremediation purposes.展开更多
Species of Paulownia are fast-growing trees that are planted in many countries in green spaces and agroforestry systems. We studied the influence of irrigation on the diameter growth of 2-year-old Paulownia tomentosa ...Species of Paulownia are fast-growing trees that are planted in many countries in green spaces and agroforestry systems. We studied the influence of irrigation on the diameter growth of 2-year-old Paulownia tomentosa saplings planted in 3 m 9 3 m grids at Nazlou Campus of Urmia University, Iran. Completely randomized experimental design was used with four irrigation amount, viz.10, 15, 20 and 25 L, and three irrigation intervals, viz. 3-and 6-days, in 8 replications. During the growth season, we measured collar diameters of all saplings at the end of each month. Diameter growth declined with reduced irrigation amount and increased irrigation interval. The lowest average diameter growth（9 mm） was recorded for 10 L water at 6-day intervals and maximum average diameter growth（28.7 mm） was recorded for 25 L volume at 3-day intervals. The latter treatment resulted in significantly greater diameter growth than any other treatment（except20 L at 3-day intervals）. More than 80 % of diameter growth was achieved in the first 3 months. Therefore, it is essential to irrigate with 25 L of water at 3-day intervals during the first three growth months to achieve maximum diameter growth for 2-year-old P. tomentosa saplings.展开更多
The work reports about the establishment and the development after two years of a Paulownia tree plantation in a large and homogeneous agricultural area, representative as a test site for climate, soil and land use ch...The work reports about the establishment and the development after two years of a Paulownia tree plantation in a large and homogeneous agricultural area, representative as a test site for climate, soil and land use characters of the countryside of Oristano, central Sardinia, Italy. The first results showed that the role assigned to Paulownia trees can be a beneficial system leading to a low carbon and high biomass productive agriculture in short time.展开更多
The effects of oxytetracycline on the morphology of the seedling with witches’ broom and global DNA methylation level of Paulownia tomentosa × Paulownia fortunei were investigated.The results indicated that the ...The effects of oxytetracycline on the morphology of the seedling with witches’ broom and global DNA methylation level of Paulownia tomentosa × Paulownia fortunei were investigated.The results indicated that the infected seedlings by phytoplasma recovered to normal morphology of the healthy seedlings after being treated with more than 20 mg L-1 oxytetracycline,and the pathogen could not be detected with PCR in the seedlings.The global DNA methylation level of diseased seedlings was lower than that of healthy one.The oxytetracycline treatment was able to increase the DNA methylation level,and the methylation level of the diseased seedlings increased with the dose of applied oxytetracycline.However the increased methylation of infected seedlings with oxytetracycline treatment could still not reach to level of healthy seedling（CK）,even the seedlings treated with lethal oxytetracycline concentration.展开更多
文摘This paper dealt with the studying the germination percentage. germination potential and analyzing thegermination of the seeds wtith different treatments by systematic statistics method Seeds were collected from 14 prove-nances in September 1994. The results indicated that the germination percentage and germinalion potential of the seeds invarious provenances were different. Both indexes in Nanchang area was much lower than those in the rest provcnances.The germination percentage and germination potenlial of the seeds in different provenance deelined after the seeds weretreated with aging for one year. The light treatment might promotes the germination percentage more effectively than thegermination potential. In addition. fuzzy cluster may refleet the relationship among germination in different protenances.
文摘High concentrations of heavy metals (Pb, Zn, As, Cd) were found in the vegetative and generative organs of Paulownia tomentosa (Thunb.) Steud., 1841) in industrial production zones and along transport routes in Samarkand, Samarkand region of the Republic of Uzbekistan. The obtained results confirm the potential of using this plant for phytoremediation purposes.
文摘Species of Paulownia are fast-growing trees that are planted in many countries in green spaces and agroforestry systems. We studied the influence of irrigation on the diameter growth of 2-year-old Paulownia tomentosa saplings planted in 3 m 9 3 m grids at Nazlou Campus of Urmia University, Iran. Completely randomized experimental design was used with four irrigation amount, viz.10, 15, 20 and 25 L, and three irrigation intervals, viz. 3-and 6-days, in 8 replications. During the growth season, we measured collar diameters of all saplings at the end of each month. Diameter growth declined with reduced irrigation amount and increased irrigation interval. The lowest average diameter growth（9 mm） was recorded for 10 L water at 6-day intervals and maximum average diameter growth（28.7 mm） was recorded for 25 L volume at 3-day intervals. The latter treatment resulted in significantly greater diameter growth than any other treatment（except20 L at 3-day intervals）. More than 80 % of diameter growth was achieved in the first 3 months. Therefore, it is essential to irrigate with 25 L of water at 3-day intervals during the first three growth months to achieve maximum diameter growth for 2-year-old P. tomentosa saplings.
文摘The work reports about the establishment and the development after two years of a Paulownia tree plantation in a large and homogeneous agricultural area, representative as a test site for climate, soil and land use characters of the countryside of Oristano, central Sardinia, Italy. The first results showed that the role assigned to Paulownia trees can be a beneficial system leading to a low carbon and high biomass productive agriculture in short time.
文摘The effects of oxytetracycline on the morphology of the seedling with witches’ broom and global DNA methylation level of Paulownia tomentosa × Paulownia fortunei were investigated.The results indicated that the infected seedlings by phytoplasma recovered to normal morphology of the healthy seedlings after being treated with more than 20 mg L-1 oxytetracycline,and the pathogen could not be detected with PCR in the seedlings.The global DNA methylation level of diseased seedlings was lower than that of healthy one.The oxytetracycline treatment was able to increase the DNA methylation level,and the methylation level of the diseased seedlings increased with the dose of applied oxytetracycline.However the increased methylation of infected seedlings with oxytetracycline treatment could still not reach to level of healthy seedling（CK）,even the seedlings treated with lethal oxytetracycline concentration.
基金National Natural Science Foundation of China(U1204309)Outstanding Talents Project of Henan Province(122101110700)+1 种基金Outstanding Talents Project of Henan Province(174200510001)Natural Science Foundation of Henan Province of China(162300410158)
