In order to determine the physiological mechanism of drought resistance of northern wheat in China,six drought resistant wheat and one sensitivity to drought wheat were planted in pots.They were subjected to drought t...In order to determine the physiological mechanism of drought resistance of northern wheat in China,six drought resistant wheat and one sensitivity to drought wheat were planted in pots.They were subjected to drought treatment and normal water when the plants grew to the 3-leaf stage.Samples were collected at 10,20,30,and 40 days after the drought treatment,respectively.The electrical conductivity,photosynthetic parameters,chlorophyll fluorescence parameters,sugar content,proline content,protein content,and active oxygen scavenging enzyme activity of the plants were detected,and the agronomic traits of the wheat varieties were investigated at maturity.The results indicated that the phenotype and yield-related factors of Darkhan 144 changed little under the drought stress.The relative electrical conductivity of Kefeng 6 and Darkhan 166 was lower under the drought stress,and their cell membrane was less damaged.The Darkhan 144 and Darkhan 166 had higher drought resistance coefficients,and were the wheat varieties with stronger drought resistance.However,the physiological mechanisms of drought resistance of these three wheat were different:Darkhan 144 maintained a higher photosynthetic activity under the drought stress;Darkhan 166 maintained a higher protein content,photosynthetic activity and active oxygen scavenging enzyme activity.In addition,other drought-resistant varieties Kefeng 6,Kefeng 10 and Longmai 26 had a higher content of osmoregulatory substances under the drought stress.展开更多
Mixing processes are universal in the genesis of thermal waters from Xinzhou basin. Chemical and isotopic (δD-δ18O,34S/32S,87Sr/86Sr,T) data are comprehensively used to dis cern the geochemical and hydrodynamic envi...Mixing processes are universal in the genesis of thermal waters from Xinzhou basin. Chemical and isotopic (δD-δ18O,34S/32S,87Sr/86Sr,T) data are comprehensively used to dis cern the geochemical and hydrodynamic environments of these waters. Based on a two-year hydrochemical monitoring on thermal waters from the well XD1 in Duncun geothermal field . a series of changes in quality have been observed , which are attributed to the change in the proportion of end members making up the thermal waters being withdrawn .展开更多
基金the National Ministry of Science and Technology Key Project(2018YFE0123300)the National Modern Agricultural Wheat Industry Technology System Keshan Comprehensive Test Station(CARS‒03‒54)the Collaborative Innovation and Extension System of Modern Agricultural Wheat in Heilongjiang Province。
文摘In order to determine the physiological mechanism of drought resistance of northern wheat in China,six drought resistant wheat and one sensitivity to drought wheat were planted in pots.They were subjected to drought treatment and normal water when the plants grew to the 3-leaf stage.Samples were collected at 10,20,30,and 40 days after the drought treatment,respectively.The electrical conductivity,photosynthetic parameters,chlorophyll fluorescence parameters,sugar content,proline content,protein content,and active oxygen scavenging enzyme activity of the plants were detected,and the agronomic traits of the wheat varieties were investigated at maturity.The results indicated that the phenotype and yield-related factors of Darkhan 144 changed little under the drought stress.The relative electrical conductivity of Kefeng 6 and Darkhan 166 was lower under the drought stress,and their cell membrane was less damaged.The Darkhan 144 and Darkhan 166 had higher drought resistance coefficients,and were the wheat varieties with stronger drought resistance.However,the physiological mechanisms of drought resistance of these three wheat were different:Darkhan 144 maintained a higher photosynthetic activity under the drought stress;Darkhan 166 maintained a higher protein content,photosynthetic activity and active oxygen scavenging enzyme activity.In addition,other drought-resistant varieties Kefeng 6,Kefeng 10 and Longmai 26 had a higher content of osmoregulatory substances under the drought stress.
基金The research is supported by the IET Education Foundation
文摘Mixing processes are universal in the genesis of thermal waters from Xinzhou basin. Chemical and isotopic (δD-δ18O,34S/32S,87Sr/86Sr,T) data are comprehensively used to dis cern the geochemical and hydrodynamic environments of these waters. Based on a two-year hydrochemical monitoring on thermal waters from the well XD1 in Duncun geothermal field . a series of changes in quality have been observed , which are attributed to the change in the proportion of end members making up the thermal waters being withdrawn .
