Polysaccharides and various secondary metabolites are the major bioactive ingredients in Bletilla striata tubers and their biosynthesis and accumulation are influenced by light intensity. However, the mechanisms underlying shading effects remain largely unknown. In the present study, we used a combined analysis of the physiology, metabolome, and transcriptome to investigate the physiological activities and bioactive component accumulation of B.
View Article and Find Full Text PDFAn organic cathode material for zinc-ion batteries shows a reliable proton transport mechanism. It uses a pyrazine ring as the energy storage unit and H as the shuttle ion, enabling high functionality utilization with rapid redox kinetics.
View Article and Find Full Text PDFOrganic cathode materials for aqueous rechargeable zinc batteries (ARZBs) are rapidly gaining prominence, while the exploration of compounds with affordable synthesis, satisfactory electrochemical performance, and understandable mechanisms still remains challenging. In this study, 6,8,15,17-tetraaza-heptacene-5,7,9,14,16,18-hexaone (TAHQ) as an easily synthesized organic cathode material with novel quinone/pyrazine alternately conjugated molecule structure is presented. This organic electrode exhibits good capacity with highly reversible redox reactions, and the influence of multi-active structures on the Zn/H loading behavior is systematically investigated by ex situ spectroscopy, electrochemical tests, and computation.
View Article and Find Full Text PDFSeeking organic cathode materials with low cost and long cycle life that can be employed for large-scale energy storage remains a significant challenge. This work has synthesized an organic compound, triphenazino[2,3-b](1,4,5,8,9,12-hexaazatriphenylene) (TPHATP), with as high as 87.16% yield.
View Article and Find Full Text PDFSodium ion batteries (SIBs) are expected to replace lithium ion batteries (LIBs) as the next generation of large-scale energy storage applications because of their superior cost performance. However, the larger ionic radius of Na causes a remarkable volume expansion than that of Li during charge and discharge, which reduces the performance of the battery. In this work, we engineered a composite material in that monodispersed 2 nm SbS particles are uniformly loaded into a carbon matrix (SbS/CZM), which is obtained by carbonization of a zirconium-based MOF with adsorption of Sb.
View Article and Find Full Text PDFCrops face increased risk from heat stress due to climate change. Potato (Solanum tuberosum L.) tubers grown in hot summers often have defects including pre-harvest sprouting ("heat sprouts").
View Article and Find Full Text PDFHeat stress has a severe impact on potato growth and tuberization process, always resulting in the decrease of tuber yield and quality. Therefore, it is of great significance for potato breeding to illuminate the mechanism of heat stress on potato and explore heat resistant genes. In this study, two cDNA libraries from normal potato leaves (20 °C day/18 °C night) and potato leaves with 3 days of heat treatment (35 °C day/28 °C night) were constructed respectively.
View Article and Find Full Text PDFStarch contents were found to be positively correlated with organelle/nuclear DNA ratios, suggesting that these ratios are involved in starch accumulation and may serve as a target trait in genetic engineering and a biomarker in breeding for improving the dry matter and starch production in potato. Starch is the main dry matter component of various staple food crops, including potato. Starch synthesis and accumulation is in plastids, uses sugar, consumes cellular energy, and requires active expression of starch synthesis genes.
View Article and Find Full Text PDFPolyploidy in plants can bestow long-term evolutionary flexibility and resistance to biotic and abiotic stresses. The upstream activation mechanisms of salt response remain unknown. Here we integrated transcriptome, miRNA and proteome data to describe the link between abscisic acid (ABA)-effectors and salt resistance against the background of Paulownia genome.
View Article and Find Full Text PDFDrought stress adversely affects plant productivity. Growth and timber production of Paulownia trees are limited under drought stress. Changes in gene expression patterns and miRNA in different ploidy of have been investigated.
View Article and Find Full Text PDFMicroRNAs (miRNAs) are small, non-coding RNAs that play vital roles in plant growth, development, and stress response. Increasing numbers of studies aimed at discovering miRNAs and analyzing their functions in plants are being reported. In this study, we investigated the effect of drought stress on the expression of miRNAs and their targets in plants of a diploid and derived autotetraploid Paulownia australis.
View Article and Find Full Text PDFMicroRNAs (miRNAs) play major roles in plant responses to various biotic and abiotic stresses by regulating gene expression at the transcriptional and post-transcriptional levels. Paulownia witches' broom (PaWB) disease caused by phytoplasmas reduces Paulownia production worldwide. In this study, we investigated the miRNA-mediated plant response to PaWB phytoplasma by Illumina sequencing and degradome analysis of Paulownia fortunei small RNAs (sRNAs).
View Article and Find Full Text PDFBackground: Paulownia witches' broom (PaWB) is a fatal disease of Paulownia caused by a phytoplasma. In previous studies, we found that plants with PaWB symptoms would revert to a healthy morphology after methyl methane sulfonate (MMS) treatment. To completely understand the gene expression profiles of the Paulownia-phytoplasma interaction, three high-throughput sequencing technologies were used to investigate changes of gene expression and microRNAs (miRNAs) in healthy Paulownia tomentosa plantlets, PaWB-infected plantlets, and PaWB-infected plantlets treated with 60 mg · L(-1) MMS.
View Article and Find Full Text PDFPaulownia witches' broom (PaWB) caused by a phytoplasma, has caused extensive losses in the yields of paulownia timber and resulted in significant economic losses. However, the molecular mechanisms in Paulownia that underlie the phytoplasma stress are poorly characterized. In this study, we use an Illumina platform to sequence four small RNA libraries and four degradome sequencing libraries derived from healthy, PaWB-infected, and PaWB-infected 15 mg·L-1 and 30 mg·L-1 methyl methane sulfonate (MMS)-treated plants.
View Article and Find Full Text PDFPaulownia witches' broom (PaWB) caused by the phytoplasma is a devastating disease of Paulownia trees. It has caused heavy yield losses to Paulownia production worldwide. However, knowledge of the transcriptional and post-transcriptional regulation of gene expression by microRNAs (miRNAs), especially miRNAs responsive to PaWB disease stress, is still rudimentary.
View Article and Find Full Text PDFMicroRNAs (miRNAs) play important regulatory roles in development and stress responses in plants. Lead (Pb) is a non-essential element that is highly toxic to living organisms. Platanus acerifolia is grown as a street tree in cities throughout temperate regions for its importance in improving the urban ecological environment.
View Article and Find Full Text PDFTimber properties of autotetraploid Paulownia tomentosa are heritable with whole genome duplication, but the molecular mechanisms for the predominant characteristics remain unclear. To illuminate the genetic basis, high-throughput sequencing technology was used to identify the related unigenes. 2677 unigenes were found to be significantly differentially expressed in autotetraploid P.
View Article and Find Full Text PDFPhytoplasmas are mycoplasma-like pathogens of witches' broom disease, and are responsible for serious yield losses of Paulownia trees worldwide. The molecular mechanisms of disease development in Paulownia are of considerable interest, but still poorly understood. Here, we have applied transcriptome sequencing technology and a de novo assembly approach to analyze gene expression profiles in Paulownia fortunei infected by phytoplasmas.
View Article and Find Full Text PDFPaulownia is a fast-growing deciduous hardwood species native to China, which has high ecological and economic value. In an earlier study, we reported ploidy-dependent differences in Paulownia drought tolerance by the microscopic observations of the leaves. Autotetraploid Paulownia has a higher resistance to drought stress than their diploid relatives.
View Article and Find Full Text PDFPaulownia is a fast-growing deciduous tree native to China. It has great economic importance for the pulp and paper industries, as well as ecological prominence in forest ecosystems. Paulownia is of much interest to plant breeder keen to explore new plant varieties by selecting on the basis of phenotype.
View Article and Find Full Text PDFMicroRNAs (miRNAs) are involved in plant growth, development, and response to biotic and abiotic stresses. Most of the miRNAs that have been identified in model plants are well characterized, but till now, no reports have previously been published concerning miRNAs in Paulownia australis. In order to investigate miRNA-guided transcript target regulation in P.
View Article and Find Full Text PDFMicroRNAs (miRNAs) play profound roles in plant growth and development by regulating gene expression. Tetraploid plants often have better physical characteristics and stress tolerance than their diploid progenitors, but the role of miRNAs in this superiority is unclear. Paulownia tomentosa, (Paulowniaceae) is attracting research attention in China because of its rapid development, wide distribution, and potential economic uses.
View Article and Find Full Text PDFIn spite of its economic importance, very little molecular genetics and genomic research has been targeted at the family Paulownia spp. The little genetic information on this plant is a big obstacle to studying the mechanisms of its ability to resist Paulownia Witches' Broom (PaWB) disease. Analysis of the Paulownia transcriptome and its expression profile data are essential to extending the genetic resources on this species, thus will greatly improves our studies on Paulownia.
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