Understanding of treeline ecotone ecophysiological adaptation to climate warming is still very limited. Furthermore, it is difficult to predict which plant species could dominate in the future. For this reason, a stud...Understanding of treeline ecotone ecophysiological adaptation to climate warming is still very limited. Furthermore, it is difficult to predict which plant species could dominate in the future. For this reason, a study was conducted in the treeline ecotone, East Tibetan Plateau to detect the adaptation of the dwarf willow(Salix eriostachya) to experimental warming. Compared to ambient conditions, the experimental warming advanced the bud break by 12 days, delayed the leaf abscission by20 days, and prolonged the growing period by 28 days.It also increased photosynthesis(47%), number of leaves(333%), leaf area(310%), and carbon sequestration of the dwarf willow. Experimental warming did not affect carbon use efficiency, but decreased water use efficiency significantly.Experimental warming enhanced the clonal ramets of Salix eriostachya(+ 3.7 shrubs m-2). The frequent air temperature fluctuations had minor effect on Salix eriostachya. Based on these findings, we highlighted that Salix eriostachya could dominate in the community treeline ecotone of east Tibetan Plateau in the future climate warming scenario.展开更多
The predicted increase of temperature by effect of climatic change （1.5 ℃ to 4.5 ℃）, will affect some berry components. Anthocyanins and flavonols concentration are responsible of wine color. The level of anthocya...The predicted increase of temperature by effect of climatic change （1.5 ℃ to 4.5 ℃）, will affect some berry components. Anthocyanins and flavonols concentration are responsible of wine color. The level of anthocyanin is affected by light intensity, temperature, sugars, growth regulators and vineyard management. Abscisic acid （ABA） increases the synthesis of anthocyanin in grape. The object of study was to evaluate the effect of different temperature in berries in vitro, of two cultivars combined with ABA treatments. The treatments were control （C, water） and ABA treatment （1,000 ppm） and temperature： 25, 33 and 40 ℃. In Cabemet Sauvignon, 25 and 33 ~C did not affect anthocyanin total concentration but 40 ℃ produced a 30% decrease in anthocyanin. ABA treatment increased anthocyanin vs. C at 25 and 33 ℃, mainly due to glucosylated forms. But ABA ＋ 40 ℃ showed a 44-60% decrease in all anthocyanins forms compounds. Response of Malbec to the highest temperature （40 ℃）, at the end of ripening, was different; higher temperature produced only slight decrease of total anthocyanins concentration （decrease of 7%）. Combination of temperature ＋ ABA at 20℃ and 33℃ increased anthocyanin. But ABA ＋ 40℃ decreased glucosylated and cumarylated forms of anthocyanin.展开更多
Objective To find out a specific method for diagnosis of malignant pleural effusions (MPEs)with higher sensitivity and practicality. Methods The diagnosis of MPEs were made using density gradient cen-trifugation(DGC) ...Objective To find out a specific method for diagnosis of malignant pleural effusions (MPEs)with higher sensitivity and practicality. Methods The diagnosis of MPEs were made using density gradient cen-trifugation(DGC) , smear cytologic examination( SCE) and pleural needle biopsy (PNB). Comparisons between these results and those of benign pleural effusions were also made. Results The positive rates of DGC,SCE and PNB for diagnosing MPEs were 94. 3% ,62. 9% and 44. 6% , respectively, and the positive rate of SCE combined with PNB for diagnosing MPEs was 73. 2%. The positive rate of the exfoliative tumor cells ( ETCs ) by DGC was much higher than that of SCE or/and PNB with no false-positive. Conclusion The ETCs isolated by DGC from the MPEs is quite specific for the diagnosis of malignant tumors with higher sensitivity and practicality in clinico-patho-logical practice.展开更多
基金National Natural Science Foundation of China(NSFC)(Grant Nos.31170423,31200375)
文摘Understanding of treeline ecotone ecophysiological adaptation to climate warming is still very limited. Furthermore, it is difficult to predict which plant species could dominate in the future. For this reason, a study was conducted in the treeline ecotone, East Tibetan Plateau to detect the adaptation of the dwarf willow(Salix eriostachya) to experimental warming. Compared to ambient conditions, the experimental warming advanced the bud break by 12 days, delayed the leaf abscission by20 days, and prolonged the growing period by 28 days.It also increased photosynthesis(47%), number of leaves(333%), leaf area(310%), and carbon sequestration of the dwarf willow. Experimental warming did not affect carbon use efficiency, but decreased water use efficiency significantly.Experimental warming enhanced the clonal ramets of Salix eriostachya(+ 3.7 shrubs m-2). The frequent air temperature fluctuations had minor effect on Salix eriostachya. Based on these findings, we highlighted that Salix eriostachya could dominate in the community treeline ecotone of east Tibetan Plateau in the future climate warming scenario.
文摘The predicted increase of temperature by effect of climatic change （1.5 ℃ to 4.5 ℃）, will affect some berry components. Anthocyanins and flavonols concentration are responsible of wine color. The level of anthocyanin is affected by light intensity, temperature, sugars, growth regulators and vineyard management. Abscisic acid （ABA） increases the synthesis of anthocyanin in grape. The object of study was to evaluate the effect of different temperature in berries in vitro, of two cultivars combined with ABA treatments. The treatments were control （C, water） and ABA treatment （1,000 ppm） and temperature： 25, 33 and 40 ℃. In Cabemet Sauvignon, 25 and 33 ~C did not affect anthocyanin total concentration but 40 ℃ produced a 30% decrease in anthocyanin. ABA treatment increased anthocyanin vs. C at 25 and 33 ℃, mainly due to glucosylated forms. But ABA ＋ 40 ℃ showed a 44-60% decrease in all anthocyanins forms compounds. Response of Malbec to the highest temperature （40 ℃）, at the end of ripening, was different; higher temperature produced only slight decrease of total anthocyanins concentration （decrease of 7%）. Combination of temperature ＋ ABA at 20℃ and 33℃ increased anthocyanin. But ABA ＋ 40℃ decreased glucosylated and cumarylated forms of anthocyanin.
文摘Objective To find out a specific method for diagnosis of malignant pleural effusions (MPEs)with higher sensitivity and practicality. Methods The diagnosis of MPEs were made using density gradient cen-trifugation(DGC) , smear cytologic examination( SCE) and pleural needle biopsy (PNB). Comparisons between these results and those of benign pleural effusions were also made. Results The positive rates of DGC,SCE and PNB for diagnosing MPEs were 94. 3% ,62. 9% and 44. 6% , respectively, and the positive rate of SCE combined with PNB for diagnosing MPEs was 73. 2%. The positive rate of the exfoliative tumor cells ( ETCs ) by DGC was much higher than that of SCE or/and PNB with no false-positive. Conclusion The ETCs isolated by DGC from the MPEs is quite specific for the diagnosis of malignant tumors with higher sensitivity and practicality in clinico-patho-logical practice.
