Objective: To study the chemical constituents of leaves of Paulownia fortunei (Seem.) Hemsl.
Methods: The constituents were isolated by column chromatography and their structures were elucidated through spectroscopic analysis.
Results: The compounds were identified as mimulone (I), apigenin (II), luteolin (III), 2alpha, 3beta, 19beta-trihydroxyurs-28-O-beta-D-galactonopyranos ylester (anserinoside, IV), 3alpha-hydroxyl-ursolicacid (V), ursolicacid (VI), daucosterol (VII), beta-sitosterol (VIII).
Conclusion: The compounds I - V are obtained from leaves of Paulownia fortunei (Seem.) Hemsl for the first time.
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Sensors (Basel)
September 2024
College of Forestry, Henan Agricultural University, Zhengzhou 450046, China.
This study explored the quantitative inversion of the chlorophyll content in seedling leaves under drought stress and analyzed the factors influencing the chlorophyll content from multiple perspectives to obtain the optimal model. seedlings were selected as the experimental materials for the potted water control experiments. Four drought stress treatments were set up to obtain four types of seedlings: one pair of top leaves (T1), two pairs of leaves (T2), three pairs of leaves (T3), and four pairs of leaves (T4).
View Article and Find Full Text PDFScientifica (Cairo)
May 2024
Institute of Botany, University of the Punjab, Lahore, Pakistan.
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June 2024
Botany and Microbiology Department, Faculty of Science, Helwan University, Egypt; School of Biotechnology, Badr University in Cairo, Badr City, Cairo, 11829, Egypt. Electronic address:
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July 2024
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PeerJ
January 2024
Institute of Dendrology, Polish Academy of Sciences, Kórnik, Wielkopolskie, Polska.
The aim of the study was to investigate changes in proline metabolism in seedlings of tree species during drought stress. One month old seedlings were exposed to moisture conditions at various levels (irrigation at 100, 75, 50 and 25% of field capacity), and then the material (leaves and roots) was collected three times at 10-day intervals. The activity of enzymes involved in proline metabolism was closely related to drought severity; however, proline content was not directly impacted.
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