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Articles by Thi Man Le
Total Records ( 3 ) for Thi Man Le
  Thi Man Le , Thi Lan Huong Phung and Phi Bang Cao
  Background and Objective: Magnesium is a mineral element that affects growth, crop yield as well as agricultural product quality. This work aimed to investigate the effect of magnesium on growth, fruit yield and some biochemical indices of hydroponic black tomato. Materials and Methods: The black tomatoes were grown in the modified Hoagland solutions by various concentrations of magnesium (0, 24, 48 and 96 ppm). Experiments have been conducted by using Randomized Complete Block Design (RCBD) with three replications. Duncan’s Multiple Range Test was being used at the 5% level of significance (p = 0.05). Results: The plant height of black tomato was higher in the magnesium-free plot than that in all magnesium treated plots. However, magnesium treatment improved the yield of black tomatoes, especially at a concentration of 48 ppm. The total soluble sugar and anthocyanin content were higher in magnesium-treated plots compared to the magnesium-free plot. Conclusion: The current study provides further insight into the effectiveness of magnesium on the growth, yield as well as the biochemical characteristics of black tomato. Especially, magnesium at 48 ppm had the maximum effect on plant growth, fruit yield and quality of black tomatoes grown in hydroponic solution.
  Phi Bang Cao , Van Huy Nguyen , Thi Man Le , Thi Lan Huong Phung , Xuan Duong Vu and Thi Bich Ngoc Chu
  Background and Objective: Salicylic Acid (SA) is a plant hormone that plays a key role in regulating many physiological processes in plants, including seed germination, plant growth, photosynthetic efficiency, crop yield, flowering and senescence. This study aimed to investigate the physiological responses of Chrysanthemum variety “Mai Vang” to different concentrations of SA (0, 0.5, 1.0, 1.5 and 2.0 mM). Materials and Methods: The Chrysanthemum were treated by various concentrations of SA (0.5, 1.0, 1.5 and 2.0 mM), water treatment (SA0) was considered as control. The experiment conducted in a complete randomized design with a total of five treatments, each plot consisted of 15 plants. Duncan’s multiple range test was being used for statistical analysis at the 5% level of significance (p = 0.05). Results: The SA treatments affected the content of photosynthetic pigments, proline and malondialdehyde (MDA) in leaves as well as anthocyanin in florets. Generally, SA treatments at a concentration of 0.5 and 1.0 increased the content of chlorophylls and carotenoids while decreasing the content of MDA compared to water treatments. In contrast, SA1.5 and SA2.0 treatments decreased the content of these pigments while enhancing the accumulation of MDA compared to control. All SA treatments displayed higher content of proline in leaves than control. Also, plants treated by SA at 0.5 and 1.0 mM exhibited higher maximum quantum yield of photosystem II (Fv/Fm) value than untreated and 1.5 and 2.0 mM of SA treated ones. Conclusion: The present study provides further insight into the effectiveness of SA on the physiological characteristics of Chrysanthemum “Mai Vang”. Especially, SA at 1.0 mM had the maximum positive effect on the content of photosynthetic pigments, proline, anthocyanin and Fv/Fm index. Moreover, SA1.0 treatments exhibited a significant decrease in MDA content compared to control.
  Phi Bang Cao , Ha Duc Chu , Sahar Azar , Viet Hong La , Thi Thanh Huyen Tran , Xuan Duong Vu , Thi Man Le , Linh Hung Le and Thao Duc Le
  Background and Objective: In plants, the aldehyde dehydrogenases (ALDHs) have been regarded as the key enzymes involving in numerous growth and developmental processes. This study aimed to identify and analyze ALDH gene family in genome of Eucalyptus grandis, an important woody tree. Materials and Methods: The ALDH family members in the E. grandis genome were identified by a basic local alignment search tool (BLASTP) against the E. grandis proteome database using known Arabidopsis and Vitis ALDHs as queries. Sequences were analyzed by various bioinformatics tools. Results: In this study, a total of 32 members of EgrALDH gene superfamily were identified in E. grandis and their characteristics, including chromosomal distribution, subcellular localization, protein features, gene structure and phylogenetic tree were subsequently analyzed. It has been predicted that the segmental and tandem duplication events (20 out of 21 duplicated pairs) might be the major mechanism of the expansion of EgrALDH genes. The EgrALDH genes have differentially expressed in young leaves, mature leaves, shoot tips, phloem, immature xylem and xylem. Conclusion: Results from this work showed the characteristics, evolutionary and expression analysis of ALDH gene superfamily of this important woody plant. This study provided a comprehensive understanding of the EgrALDH gene superfamily in E. grandis as well as proposed a list of candidate genes for further functional characterization.
 
 
 
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