Publications by authors named "A V Ryndin"
Background: Breeding programs for nutrient-efficient tea plant varieties could be advanced by the combination of genotyping and phenotyping technologies. This study was aimed to search functional SNPs in key genes related to the nitrogen-assimilation in the collection of tea plant (L.) Kuntze.
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- The study utilized a novel experimental design to identify key biological pathways affected by nitrogen deficiency in an evergreen tree crop, highlighting processes like lignin biosynthesis and defense responses.
- The research found significant upregulation of the MAPK pathway and ATP-binding cassette transporters, with a greater focus on calcium signaling over hormone signaling, particularly involving auxin and abscisic acid.
- A total of 45 transcription factors were increased under nitrogen deficiency, indicating a shared regulatory role in both nitrogen and pathogen responses, especially in relation to flavanoids and cell wall integrity.
Article Synopsis
- Early detection of stress in tea plants is essential for improving breeding strategies and understanding plant genetics.
- Hyperspectral technology enables rapid assessment of plant health through specific reflectance indices, but these must be validated for each crop.
- Out of 31 vegetation indices studied, several were effective in distinguishing between stress-tolerant and susceptible tea plants, particularly those that utilize near-infrared reflectance, which aids in managing tea germplasm under abiotic stress conditions.
Macroalgae have long served as bioindicators of pollution in coastal marine environments. However, conventional pollution assessment methods often take a compartmentalized approach, either focusing on macrophyte biological parameters or independently analyzing heavy metal and oil product bioaccumulation within them. This study establishes connections between: (1) the characteristics of chemical pollution in brown, green, and red macroalgae, (2) organic pollution in the nutrient medium, and (3) the resulting changes in phytocenosis composition and macrophyte morphological characteristics.
View Article and Find Full Text PDFThis study discusses the genetic mutations that have a significant association with economically important traits that would benefit tea breeders. The purpose of this study was to analyze the leaf quality and SNPs in quality-related genes in the tea plant collection of 20 mutant genotypes growing without nitrogen fertilizers. Leaf N-content, catechins, L-theanine, and caffeine contents were analyzed in dry leaves via HPLC.
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