Abstract:This paper evaluates the level of modernization of higher education in China and analyses the regional differences between provincial and provincial levels of modernization of higher education by constructing five objectives and 23 indicators, including modernization of educational concept, content, equipment, contingent and management, in order to provide reference for the reform of modernization of higher education. The results show that: (1) The overall level of higher education modernization in China's pro… Show more
“…Approximately 0.5 g of poplar seedling dry sample (after ball milling) was placed in a centrifuge tube. The content of soluble sugars was determined using the 80% ethanol + anthrone colorimetric procedure, and starch was determined using the perchloric acid method + anthrone colorimetric procedure [53][54][55][56]. The detailed experimental operation can be found in the previous research methods of this research group [49].…”
Section: Measurement Of Photosynthetic Indicatorsmentioning
The concentrations of exogenous nitrogen and calcium can significantly regulate plant growth and photosynthesis and mutually affect their absorption and utilization. However, whether there is an optimal nitrogen–calcium ratio (N:Ca ratio) in poplar seedling growth and physiological adaptation and what the mechanism of changes in the transcriptome is remain unclear. In this study, three different N:Ca ratios were used to grow poplar seedlings, and physiological and transcriptomic methods were used to study the molecular mechanisms of poplar growth under nitrogen–calcium synergy and to determine the optimal N:Ca ratio for poplar seedling growth. The results of this study showed that maximum poplar seedling growth occurred in the treatment with an N:Ca ratio of 2, which resulted in significantly greater induction of growth than the two other treatments (p < 0.05). Under the lowest N:Ca ratio, poplar seedlings can ensure normal development by regulating photosynthesis, while under the highest N:Ca ratio, regulating nitrogen metabolism can achieve the same result. These results contribute to a better understanding of the molecular mechanisms by which poplar seedlings respond to different ratios of N:Ca. This study provides a valuable basis for exploring the synergistic effects of nitrogen and calcium on the growth of poplar shelterbelts.
“…Approximately 0.5 g of poplar seedling dry sample (after ball milling) was placed in a centrifuge tube. The content of soluble sugars was determined using the 80% ethanol + anthrone colorimetric procedure, and starch was determined using the perchloric acid method + anthrone colorimetric procedure [53][54][55][56]. The detailed experimental operation can be found in the previous research methods of this research group [49].…”
Section: Measurement Of Photosynthetic Indicatorsmentioning
The concentrations of exogenous nitrogen and calcium can significantly regulate plant growth and photosynthesis and mutually affect their absorption and utilization. However, whether there is an optimal nitrogen–calcium ratio (N:Ca ratio) in poplar seedling growth and physiological adaptation and what the mechanism of changes in the transcriptome is remain unclear. In this study, three different N:Ca ratios were used to grow poplar seedlings, and physiological and transcriptomic methods were used to study the molecular mechanisms of poplar growth under nitrogen–calcium synergy and to determine the optimal N:Ca ratio for poplar seedling growth. The results of this study showed that maximum poplar seedling growth occurred in the treatment with an N:Ca ratio of 2, which resulted in significantly greater induction of growth than the two other treatments (p < 0.05). Under the lowest N:Ca ratio, poplar seedlings can ensure normal development by regulating photosynthesis, while under the highest N:Ca ratio, regulating nitrogen metabolism can achieve the same result. These results contribute to a better understanding of the molecular mechanisms by which poplar seedlings respond to different ratios of N:Ca. This study provides a valuable basis for exploring the synergistic effects of nitrogen and calcium on the growth of poplar shelterbelts.
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