[Objectives]The effects of"Glimmer"treatment on dry matter accumulation,yield and cadmium accumulation in different types of rice varieties were investigated,in order to provide a theoretical basis for the r...[Objectives]The effects of"Glimmer"treatment on dry matter accumulation,yield and cadmium accumulation in different types of rice varieties were investigated,in order to provide a theoretical basis for the regulation of low cadmium accumulation in rice grains.[Methods]Under the treatment of cadmium contaminated soil with a concentration of 0.58 mg/kg,the effects of"Glimmer"treatment on dry matter accumulation,yield and cadmium content of different rice varieties were studied by pot experiment.[Results]Spraying"Glimmer"can increase the biological yield of rice,and the different types of rice showed the order of conventional rice>two-line hybrid rice>three-line hybrid rice.Among the conventional rice,most significant increase was observed in Huanghuazhan,and in two-line hybrid rice,C Liangyou 651 increased the most.The"Glimmer"treatment had an obvious yield increasing effect on conventional rice,among which such two varieties as Xiangwanxian 13 and Huanghuazhan had the largest increases,followed by the two-line hybrid rice,and a little effect was observed on the three-line hybrid rice.The"Glimmer"treatment resulted in a significant reduction in cadmium content in different types of rice,which decreased by 13.33%-26.09%,and seven varieties showed a reduction over 21.74%.[Conclusions]The"Glimmer"treatment can significantly reduce the cadmium content in rice,and generally promote the dry matter accumulation and yield increase of rice,of which conventional rice performed better.展开更多
Modern scleractinian corals are classified into robust,complex,and basal clades through comparative molecular studies.However,only few morphological or biological criteria can systematically determine the evolutionary...Modern scleractinian corals are classified into robust,complex,and basal clades through comparative molecular studies.However,only few morphological or biological criteria can systematically determine the evolutionary trajectories of these major scleractinian coral clades.Here,we obtained the structural information of 21 scleractinian coral species representing robust and complex clades:High-resolution micro-computed tomography was used to reconstruct the polyp-canal systems in their colonies and to visualize the dynamic polyp growth processes.We found that the emergence of mesh-like canals may distinguish representatives of complex and robust clades.The differences in polyp-canal connections suggest distinct evolutionary trajectories among coral species:The formation of the canal network promoted the development of more complex coral structures,and coral polyps within this network formed calices of very similar volume,following precise axial growth directions.The influence of individual polyps on the coral colony becomes less significant as coral structures become more complex,and coral species with more complicated polyp-canal systems occupied niches more efficiently.This work supplements current evolutionary studies on reef-building corals,providing insight for further studies on coral growth patterns.展开更多
基金Supported by Hunan Provincial Financial FundHunan Hybrid Rice Research Center Project(38018136)
文摘[Objectives]The effects of"Glimmer"treatment on dry matter accumulation,yield and cadmium accumulation in different types of rice varieties were investigated,in order to provide a theoretical basis for the regulation of low cadmium accumulation in rice grains.[Methods]Under the treatment of cadmium contaminated soil with a concentration of 0.58 mg/kg,the effects of"Glimmer"treatment on dry matter accumulation,yield and cadmium content of different rice varieties were studied by pot experiment.[Results]Spraying"Glimmer"can increase the biological yield of rice,and the different types of rice showed the order of conventional rice>two-line hybrid rice>three-line hybrid rice.Among the conventional rice,most significant increase was observed in Huanghuazhan,and in two-line hybrid rice,C Liangyou 651 increased the most.The"Glimmer"treatment had an obvious yield increasing effect on conventional rice,among which such two varieties as Xiangwanxian 13 and Huanghuazhan had the largest increases,followed by the two-line hybrid rice,and a little effect was observed on the three-line hybrid rice.The"Glimmer"treatment resulted in a significant reduction in cadmium content in different types of rice,which decreased by 13.33%-26.09%,and seven varieties showed a reduction over 21.74%.[Conclusions]The"Glimmer"treatment can significantly reduce the cadmium content in rice,and generally promote the dry matter accumulation and yield increase of rice,of which conventional rice performed better.
基金the Open Research Fund Program of Guangxi Key Laboratory of Mangrove Conservation and Utilization(grant number GKLMC-202002)Guangxi Key Research and Development Programme funding(grant number AB19245045).
文摘Modern scleractinian corals are classified into robust,complex,and basal clades through comparative molecular studies.However,only few morphological or biological criteria can systematically determine the evolutionary trajectories of these major scleractinian coral clades.Here,we obtained the structural information of 21 scleractinian coral species representing robust and complex clades:High-resolution micro-computed tomography was used to reconstruct the polyp-canal systems in their colonies and to visualize the dynamic polyp growth processes.We found that the emergence of mesh-like canals may distinguish representatives of complex and robust clades.The differences in polyp-canal connections suggest distinct evolutionary trajectories among coral species:The formation of the canal network promoted the development of more complex coral structures,and coral polyps within this network formed calices of very similar volume,following precise axial growth directions.The influence of individual polyps on the coral colony becomes less significant as coral structures become more complex,and coral species with more complicated polyp-canal systems occupied niches more efficiently.This work supplements current evolutionary studies on reef-building corals,providing insight for further studies on coral growth patterns.