New lines of wheat ( Triticum aestivum L.) was obtained by introducing the DNA of sorghum (Sorghum vulgare Pers.) into wheat cultivar 'Longchun 13'. The changes of respiratory pathway, contents of protein, Na+...New lines of wheat ( Triticum aestivum L.) was obtained by introducing the DNA of sorghum (Sorghum vulgare Pers.) into wheat cultivar 'Longchun 13'. The changes of respiratory pathway, contents of protein, Na+ and K+ in the leaves and roots of the new lines of wheat under salt stress were determined and compared with the control cultivar, 'Longchun 13'. The decrease of the content of K+ was observed with the increase of NaCl concentrations, but the decrease was more in the control than that in the new lines, and more in roots than in leaves. Content of proline and Na+ in both two wheats lines increased greatly, but the former increased more significantly in the new lines and the latter more significantly in control both in leaves and roots. The operation of the cyanide-resistant pathway of respiration was enhanced at different degrees after salt stress and it increased much more in roots and leaves of the control plant than that in the new lines, but the cytochrome pathway of electron transport was still the main one consistently. The possible significance of these changes was discussed.展开更多
Freshwater biofouling threatens a variety of human activities,from the supply of water and energy to recreation.Several species of freshwater bryozoans are notorious for clogging pipes and filters but have been relati...Freshwater biofouling threatens a variety of human activities,from the supply of water and energy to recreation.Several species of freshwater bryozoans are notorious for clogging pipes and filters but have been relatively poorly studied to date.We report,for the first time,a biofouling species of freshwater bryozoan,Pectinatella magnifica(Leidy,1851),from several freshwater rivers,lakes and ponds in China.A complete description,national distribution and the fouling problems are provided.Exactly how Pectinatella magnifica arrived in China remains unclear,but anthropochory and zoochory are considered to be important dispersal pathways.展开更多
文摘New lines of wheat ( Triticum aestivum L.) was obtained by introducing the DNA of sorghum (Sorghum vulgare Pers.) into wheat cultivar 'Longchun 13'. The changes of respiratory pathway, contents of protein, Na+ and K+ in the leaves and roots of the new lines of wheat under salt stress were determined and compared with the control cultivar, 'Longchun 13'. The decrease of the content of K+ was observed with the increase of NaCl concentrations, but the decrease was more in the control than that in the new lines, and more in roots than in leaves. Content of proline and Na+ in both two wheats lines increased greatly, but the former increased more significantly in the new lines and the latter more significantly in control both in leaves and roots. The operation of the cyanide-resistant pathway of respiration was enhanced at different degrees after salt stress and it increased much more in roots and leaves of the control plant than that in the new lines, but the cytochrome pathway of electron transport was still the main one consistently. The possible significance of these changes was discussed.
基金Supported by the National Natural Science Foundation of China(Nos.31100407,31471962)
文摘Freshwater biofouling threatens a variety of human activities,from the supply of water and energy to recreation.Several species of freshwater bryozoans are notorious for clogging pipes and filters but have been relatively poorly studied to date.We report,for the first time,a biofouling species of freshwater bryozoan,Pectinatella magnifica(Leidy,1851),from several freshwater rivers,lakes and ponds in China.A complete description,national distribution and the fouling problems are provided.Exactly how Pectinatella magnifica arrived in China remains unclear,but anthropochory and zoochory are considered to be important dispersal pathways.
