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Is autophagy always a death sentence? A case study of highly selective cytoplasmic degradation during phloemogenesis.
Ann Bot
November 2024
Department of General Botany, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
Background And Aims: The transformation of sieve elements (SEs) from meristematic cells, equipped with a full complement of organelles, to specialized transport tubes devoid of a nucleus, has long been enigmatic. We hypothesized a strong involvement of various degradation pathways, particularly macroautophagy in this context, emphasizing the importance of autophagic selectivity in the remaining viability of these cells.
Methods: Experiments were performed on pioneer roots of Populus trichocarpa cultivated in rhizotrons under field conditions.
Transcriptomics and metabolomics revealed the molecular basis of the color formation in the roots of .
Heliyon
September 2024
Key Laboratory of Beijing for Identification and Safety Evaluation of Chinese Medicine, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, 100700, Beijing, China.
Article Synopsis
- The study compares two cultivars of a traditional Chinese medicine, 'Miaoxiang Sanqi No. 2' (yellow root) and 'Wenyuan Ziqi No. 1' (purple root), focusing on their morphological, transcriptional, and metabolic differences.
- It was found that 'Wenyuan Ziqi No. 1' has a higher accumulation of anthocyanins, particularly cyanidin 3-O-galactoside, leading to its purple coloration, and contains 155 different metabolites, including flavones and phenylpropanoids.
- The research highlights the strong expression of phenylpropanoid biosynthesis pathway genes and identifies eight genes potentially involved in anthocyanin
Single-cell RNA sequencing reveals a high-resolution cell atlas of petals in at different flowering development stages.
Hortic Res
September 2024
College of Landscape Architecture and Arts, Northwest A&F University, Yangling, Shaanxi 712100, China.
(mei), a traditional ornamental plant in China, is renowned for its fragrant flowers, primarily emitted by its petals. However, the cell types of mei petals and where floral volatile synthesis occurs are rarely reported. The study used single-cell RNA sequencing to characterize the gene expression landscape in petals of 'Fenhong Zhusha' at budding stage (BS) and full-blooming stage (FS).
View Article and Find Full Text PDFPositive pressure in bamboo is generated in stems and rhizomes, not in roots.
AoB Plants
July 2024
Department of Biological Science, California State University Fullerton, 800 N. State College Blvd., Fullerton, CA 92831, USA.
Bamboos stand out among other tall plants in being able to generate positive pressure in the xylem at night, pushing water up to the leaves and causing drops to fall from leaf tips as guttation that can amount to a steady nocturnal 'bamboo rain'. The location and mechanism of nocturnal pressure generation in bamboos are unknown, as are the benefits for the plants. We conducted a study on the tall tropical bamboo species (giant timber bamboo) growing outdoors in southern California under full irrigation to determine where in the plant the nocturnal pressure is generated, when it rises in the evening, and when it dissipates in the morning.
View Article and Find Full Text PDFCanopy Architecture and Sun Exposure Influence Berry Cluster-Water Relations in the Grapevine Variety Muscat of Alexandria.
Plants (Basel)
May 2024
LEAF-Linking Landscape, Environment, Agriculture and Food Research Center, Associate Laboratory TERRA, School of Agriculture, University of Lisbon, Tapada da Ajuda, 1349-017 Lisboa, Portugal.
Climate-change-related increases in the frequency and intensity of heatwaves affect viticulture, leading to losses in yield and grape quality. We assessed whether canopy-architecture manipulation mitigates the effects of summer stress in a Mediterranean vineyard. The L variety Muscat of Alexandria plants were monitored during 2019-2020.
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